Decorative tea powder for baking and preparation method thereof

Abstract

The invention relates to the technical field of food processing, in particular to decorative tea powder for baking and a preparation method thereof. The invention provides decorative tea powder for baking, which comprises the following components in parts by weight: 100 parts of tea powder and 11-30 parts of an embedding agent, the decorative tea powder for baking is prepared by spraying an embedding agent onto suspended tea powder for embedding. A fluidized bed or a paddle type mixer is used for spraying, grease is directly wrapped on the surface of the tea powder, the damp-proof effect and appearance stability of the damp-proof tea powder are improved, an organic solvent is not needed to serve as a grease dispersing medium, and therefore residues of the organic solvent are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of food processing, in particular to decorative tea powder for baking and a preparation method thereof. Background Art

[0002] Tea is one of the three major traditional beverages in the world and has always been loved by people. Chinese tea culture is profound and far-reaching. With the improvement of living standards, people no longer regard tea as just a beverage. The usage of tea has begun to diversify. Tea is ground into powder and then sprinkled on the surface of baked products as a decoration, which improves the appearance of the product and enriches the taste of the product, which is deeply loved by consumers.

[0003] However, tea powder is easily affected by moisture when exposed to the air and changes color. In addition, some baked products themselves have a high water content. If ordinary tea powder is used as a decoration, the tea powder will absorb moisture and change color in a very short time, affecting the appearance of the product, shortening the shelf life of the product and affecting sales.

[0004] Chinese patent CN108617812A discloses a moisture-proof tea powder and its preparation method and application in food, which consists of tea powder and oil phase, wherein tea powder particles are embedded in the oil phase; the preparation method is prepared by solvent mixing, homogenization and drying, wherein the mass ratio of oil phase, solvent and tea powder is: 0.5-10:10-50:10-50 respectively; the oil phase can effectively block the contact between tea powder particles and water, oxygen and other substances, prevent the tea powder from absorbing water and becoming damp, discoloring when encountering oxygen, and prolong the storage time of tea powder. The prepared moisture-proof tea powder is evenly dispersed on the surface of food, the tea powder is not easy to absorb moisture and discolor, and the appearance stability of tea food is improved. It effectively solves the problems of moisture absorption and discoloration of tea powder when used on the surface of high-moisture food, improves the added value of tea powder, and broadens its application field. Although the invention can embed tea powder, it also involves the evaporation and recovery of organic solvents and the drying of tea powder. The whole process is relatively complicated, costly, and faces the risk of organic residues. Summary of the invention

[0005] The technical problem to be solved by the present invention is how to reduce the residual organic solvent in the decorative tea powder for baking, and at the same time improve the embedding effect and moisture-proof effect of the tea powder.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a decorative tea powder for baking, which comprises, by weight, 100 parts of tea powder and 11-30 parts of an embedding agent;

[0008] The decorative tea powder for baking is prepared by spraying an embedding agent onto the suspended tea powder for embedding.

[0009] In one embodiment of the present invention, the decorative tea powder for baking comprises 100 parts of tea powder and 20-30 parts of embedding agent, by weight;

[0010] In one embodiment of the present invention, the embedding agent is a vegetable oil;

[0011] Preferably, the solidification point of the vegetable oil is 24-51° C., and the vegetable oil is preferably selected from one or a combination of two or more of soybean oil, rapeseed oil, corn oil, palm oil and peanut oil;

[0012] More preferably, the vegetable oil is a mixture of 51-degree palm oil and one or more of 24-degree palm oil, corn oil or soybean oil. Preferably, the vegetable oil is 51-degree palm oil and 24-degree palm oil or 51-degree palm oil and corn oil; more preferably, the mass ratio of 51-degree palm oil to one or more of 24-degree palm oil, corn oil or soybean oil is 1:5-5:1, preferably 1:5-2:1;

[0013] Further preferably, the vegetable oil is 51 degree palm oil and 24 degree palm oil and / or corn oil, preferably the mass ratio of 51 degree palm oil to 24 degree palm oil and / or corn oil is 1:1-1:4, preferably 1:2-1:3.

[0014] In one embodiment of the present invention, the decorative tea powder for baking further comprises a first auxiliary material and / or a second auxiliary material.

[0015] Preferably, the first auxiliary material is a sweetener and / or a flavor, more preferably, in parts by weight, the sweetener is 10-80 parts, preferably the flavor is 0.001-0.1 parts; and / or,

[0016] The second auxiliary material is a pigment, and preferably, the pigment is 0.01-0.05 parts by weight.

[0017] In a second aspect, the present invention further provides a method for preparing the above-mentioned decorative tea powder, which comprises the following steps: spraying an embedding agent onto the suspended tea powder for embedding to obtain the decorative tea powder for baking.

[0018] In one embodiment of the present invention, the preparation method comprises the following steps:

[0019] (1) suspending tea powder in a fluidized bed or paddle mixer, and adding the first auxiliary material as needed;

[0020] (2) Control the temperature of tea powder to 10-25°C;

[0021] (3) heating the embedding agent to melt it, and adding the second auxiliary material as needed;

[0022] (4) Spraying the embedding agent into a fluidized bed or paddle mixer in which tea powder is suspended to obtain the decorative tea powder for baking.

[0023] In one embodiment of the present invention, in step (3), the heating temperature of the embedding agent is 25-35°C.

[0024] In one embodiment of the present invention, the embedding agent is sprayed from the top of a fluidized bed or paddle mixer;

[0025] Preferably, the spraying is carried out using an air atomizing nozzle, more preferably the air pressure during spraying is 0.1-0.3 MPa, further preferably the peristaltic pump speed during spraying the embedding agent is 10-20 rpm / min; further preferably the fluidized bed air inlet temperature is 10-25°C.

[0026] In a third aspect, the present invention also provides the use of the above-mentioned decorative tea powder for baking or the decorative tea powder for baking prepared by the above-mentioned preparation method in food, preferably in baked food, and more preferably the baked food is donuts.

[0027] In a fourth aspect, the present invention further provides a donut containing the above-mentioned decorative tea powder for baking or the decorative tea powder for baking prepared by the above-mentioned preparation method, which is prepared by sprinkling the decorative tea powder for baking on the surface of the donut.

[0028] Beneficial effects of the present invention:

[0029] 1. The present invention realizes one-step embedding by spray embedding in a fluidized bed or a paddle mixer. After embedding, the tea powder is moisture-proof and does not need to be dried, which greatly reduces the cost and improves the production efficiency.

[0030] 2. The present invention utilizes fluidized bed or paddle mixer spraying to directly wrap the oil on the surface of tea powder, thereby improving the embedding effect of moisture-proof tea powder and not requiring organic solvent as a medium for oil dispersion, thereby avoiding the residue of organic solvent. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A photo of the doughnuts freshly sprinkled with decorative tea powder;

[0032] Figure 2 This is a photo of the donuts sprinkled with decorative tea powder after being left for 12 hours. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and technical effect of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention is described clearly and completely. The embodiments described below are part of the embodiments of the present invention, not all of them. In combination with the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The object of the present invention is to provide a decorative tea powder for baking, which has good embedding effect and moisture-proof effect.

[0035] In a first aspect, in a specific embodiment of the present invention, the present invention provides a decorative tea powder for baking, wherein the decorative tea powder for baking comprises 100 parts of tea powder and 11-30 parts of embedding agent in parts by weight;

[0036] The decorative tea powder for baking is prepared by spraying an embedding agent onto the suspended tea powder for embedding.

[0037] In one embodiment of the present invention, the baking decorative tea powder comprises 100 parts of tea powder and 20-30 parts of embedding agent by weight. The inventors have found through experimental research that the embedding rate of the decorative tea powder can be further improved by further selecting a specific ratio of tea powder and embedding agent.

[0038] In one embodiment of the present invention, the embedding agent is a vegetable oil; the solidification point of the vegetable oil is 24-51°C; selecting a vegetable oil with a low solidification point can prevent high temperature oxidation and discoloration, and is also conducive to improving the taste of the tea powder;

[0039] Preferably, the vegetable oil is selected from one or a combination of two or more of soybean oil, rapeseed oil, corn oil, palm oil and peanut oil.

[0040] More preferred is palm oil or a mixture of palm oil and at least one of soybean oil and corn oil.

[0041] More preferably, the vegetable oil is a mixture of 51-degree palm oil and one or more of 24-degree palm oil, corn oil or soybean oil. Preferably, the vegetable oil is a mixture of 51-degree palm oil and 24-degree palm oil or 51-degree palm oil and corn oil. More preferably, the mass ratio of 51-degree palm oil to one or more of 24-degree palm oil, corn oil or soybean oil is 1:5-5:1, preferably 1:5-2:1. By selecting a specific combination of oils and fats, not only the taste and appearance stability of the tea powder can be improved, but also the embedding effect and moisture-proof effect during low-temperature embedding can be further improved.

[0042] In some embodiments of the present invention, the mass ratio of the above-mentioned 51-degree palm oil to one or more oils containing 24-degree palm oil, corn oil, or soybean oil can be 1:5-5:1, 1:5-4:1, 1:5-3:1, 1:5-2:1, 1:5-1:1, 1:4-5:1, 1:3-5:1, 1:2-5:1 or 1:1-5:1. In some embodiments of the present invention, the mass ratio of the above-mentioned 51-degree palm oil to one or more oils containing 24-degree palm oil, corn oil, or soybean oil can be 1:5, 1:4, 1:3, 1:2, 1:1, 2:1, 3:1, 4:1 or 5:1, or a mass ratio within the numerical range consisting of any two of the above-mentioned specific values ​​as endpoints. It should be understood that in a specific embodiment, any of the above ranges can be combined with any other ranges, as long as the baking decorative tea powder with the desired performance of the present invention can be obtained.

[0043] In some embodiments of the present invention, the vegetable oil can be 51 degree palm oil and 24 degree palm oil and / or corn oil, preferably, the mass ratio of 51 degree palm oil to 24 degree palm oil and / or corn oil is 1:1-1:4, preferably 1:2-1:3.

[0044] In one embodiment of the present invention, auxiliary materials such as sweeteners, pigments, flavors, etc. may be added as needed, wherein the auxiliary materials include a first auxiliary material and / or a second auxiliary material, preferably, the first auxiliary material is a sweetener and / or a flavor; more preferably, the second auxiliary material is a pigment.

[0045] The sweetener is selected from one or a combination of two or more of glucose powder, sucrose powder, maltooligosaccharide powder, xylose powder, trehalose powder, sorbitol powder, erythritol powder or isomalt powder, preferably glucose.

[0046] The flavor is selected from one or a combination of two or more of strawberry flavor, banana flavor, sweet orange flavor, coconut flavor, peach flavor, pineapple flavor, milk flavor and vanillin, preferably strawberry flavor;

[0047] The pigment is selected from one or a combination of two or more of red yeast rice, β-carotene, curcumin, caramel color, spinach powder, pumpkin powder and pitaya powder, preferably chlorophyll;

[0048] Preferably, the sweetener is 10-80 parts by weight;

[0049] Preferably, the flavor is 0.001-0.01 parts by weight;

[0050] Preferably, the pigment is 0.01-0.05 parts by weight.

[0051] In a second aspect, the present invention also provides a method for preparing the above-mentioned decorative tea powder for baking, comprising the following steps: spraying an embedding agent onto the suspended tea powder for embedding to obtain the decorative tea powder for baking.

[0052] It should be noted that the suspended tea powder of the present invention can be achieved by a fluidized bed or a paddle mixer. For example, the bottom of the fluidized bed is ventilated. When the wind speed reaches a critical value, the tea powder inside the fluidized bed will be suspended in the fluidized bed under the action of wind. The paddle mixer can also throw the tea powder into the air through stirring to form suspended tea powder.

[0053] In one embodiment of the present invention, the preparation method comprises the following steps:

[0054] (1) suspending tea powder in a fluidized bed or paddle mixer, and adding the first auxiliary material as needed;

[0055] (2) Control the temperature of tea powder to 10-25°C;

[0056] (3) heating the embedding agent to melt it, and adding the second auxiliary material as needed;

[0057] (4) Spraying the embedding agent into a fluidized bed or paddle mixer in which tea powder is suspended to obtain the decorative tea powder for baking.

[0058] In one embodiment of the present invention, the heating temperature of the embedding agent in step (3) is 25-35°C.

[0059] In one embodiment of the present invention, the embedding agent is sprayed from the top of a fluidized bed or paddle mixer. Preferably, the speed of the peristaltic pump is 10-20 rpm / min when the embedding agent is sprayed. It is further preferred that the spraying is performed using an air atomizing nozzle. It is further preferred that the air pressure during spraying is 0.1-0.3 MPa.

[0060] In one embodiment of the present invention, the embedding agent can be sprayed from any position of the fluidized bed or the paddle mixer, preferably from the top, and after atomization, the embedding agent is sprayed on the tea powder to complete the embedding; preferably, the embedding agent is sprayed from the top of the fluidized bed, and the air inlet volume of the fluidized bed is preferably 40-60m 3 / h, more preferably the inlet air temperature of the fluidized bed is 10-25°C.

[0061] The embedding agent is sprayed from the top, which can make the embedding agent and tea powder mixed more evenly, thereby improving the embedding effect and moisture-proof effect. At the same time, the embedding agent can be fully utilized to further improve the appearance stability and taste of the moisture-proof tea powder.

[0062] In a third aspect, the present invention also provides the use of the above-mentioned decorative tea powder for baking or the decorative tea powder for baking prepared by the above-mentioned preparation method in food, preferably in baked food, and preferably the baked food is donuts.

[0063] In a fourth aspect, the present invention further provides a donut containing the above-mentioned decorative tea powder for baking or the decorative tea powder for baking prepared by the above-mentioned preparation method, wherein the decorative tea powder for baking is coated on the surface of the donut.

[0064] The beneficial effects of the present invention are further illustrated by specific examples below.

[0065] The raw materials and reagents used in the present invention are all purchased from mainstream manufacturers in the market. Those without manufacturer or concentration are all analytically pure raw materials and reagents that can be routinely obtained. As long as they can play the expected role, there is no special limitation.

[0066] If no specific technology or conditions are specified in this embodiment, the process shall be carried out according to the technology or conditions described in the literature in the art or according to the product manual.

[0067] Hereinafter, the present invention will be described in more detail using examples and comparative examples, but the technical scope of the present invention is not limited to these examples. It should be noted that, unless otherwise specified, all percentages, parts, and ratios used in the present invention are based on mass.

[0068] The sources of the reagents and instruments used in the following examples are shown in Table 1.

[0069] Table 1 Raw material information used in the examples

[0070] raw material Model / Purity Manufacturers for sale Soybean Oil Food Grade Yihai Kerry (Golden Arowana) Corn Oil Food Grade Yihai Kerry (Golden Arowana) Rapeseed Oil Food Grade Yihai Kerry (Golden Arowana) 51 degree palm oil Food Grade Yihai Kerry (Golden Swallow Brand) 24 degree palm oil Food Grade Yihai Kerry (Ocean King) Green tea powder Food Grade Hubei Caihua Tea Co., Ltd. Black tea powder Food Grade Hubei Caihua Tea Co., Ltd. glucose 60 mesh food grade Weifang Shengtai Pharmaceutical Co., Ltd. Curcumin Food Grade AIPU Fragrances & Fragrances Group Co., Ltd. Strawberry flavor Food Grade AIPU Fragrances & Fragrances Group Co., Ltd. Fluidized Bed WBF-2G Chongqing Yingge Granulation Coating Technology Co., Ltd. Paddle mixer JHT20 Zhengzhou Jinhe Equipment Manufacturing Co., Ltd. Homogenizer APV60 Shanghai Shunyi Experimental Equipment Co., Ltd.

[0071] Example 1

[0072] Weigh the raw materials according to the following weight parts, as follows:

[0073] Embedding medium: soybean oil 4g, 51 degree palm oil 7g

[0074] Green tea powder: 100g

[0075] Preparation method

[0076] Step 1: Weigh the embedding agent and heat it to 30°C;

[0077] Step 2: Place the tea powder into the fluidized bed and adjust the air volume to 60m 3 / h to suspend the material, the inlet air temperature is 20℃, and the temperature of the tea powder is maintained at 15-25℃;

[0078] Step 3: Turn on the spray gun and spray the embedding agent heated in step 1. The peristaltic pump speed is 10r / min to obtain decorative tea powder for baking. The spray gun nozzle adopts an air atomization nozzle with an atomization pressure of 0.1MPa. The spray gun is set on the top of the fluidized bed.

[0079] Example 2

[0080] Weigh the raw materials according to the following weight parts, as follows:

[0081] Embedding medium: corn oil 20g, 51 degree palm oil 10g

[0082] Green tea powder: 100g

[0083] Preparation method

[0084] Step 1: Weigh the embedding agent and heat it to 25°C;

[0085] Step 2: Place the tea powder into the fluidized bed and adjust the air volume to 40m 3 / h to suspend the material, the inlet air temperature is 15℃, and the temperature of the tea powder is maintained at 15-20℃;

[0086] Step 3: Turn on the spray gun and spray the embedding agent heated in step 1. The peristaltic pump speed is 10r / min to obtain decorative tea powder for baking. The spray gun nozzle adopts an air atomization nozzle with an atomization pressure of 0.2MPa. The spray gun is set on the top of the fluidized bed.

[0087] Example 3

[0088] Weigh the raw materials according to the following weight parts, as follows:

[0089] Embedding medium: 5g 51 degree palm oil, 15g 24 degree palm oil

[0090] Green tea powder: 100g

[0091] Glucose: 10g

[0092] Chlorophyll: 0.1g

[0093] Preparation method

[0094] Step 1: Weigh the embedding agent and heat it to 35°C, add chlorophyll and mix well;

[0095] Step 2: Place tea powder and glucose into the fluidized bed and adjust the air volume to 50m 3 / h to suspend the material, the inlet air temperature is 10℃, and the material temperature is maintained at 10-15℃;

[0096] Step 3: Turn on the spray gun and spray the embedding agent heated and mixed in step 1. The peristaltic pump speed is 20r / min to obtain decorative tea powder for baking. The spray gun nozzle adopts an air atomizing nozzle with an atomizing pressure of 0.3MPa. The spray gun is set on the top of the fluidized bed.

[0097] Example 4

[0098] Weigh the raw materials according to the following weight parts, as follows:

[0099] Embedding medium: 15g of palm oil (51 degrees) and corn oil in a mass ratio of 1:5,

[0100] Black tea powder: 100g

[0101] Glucose: 15g

[0102] Strawberry flavor: 0.01g

[0103] Preparation method

[0104] Step 1: Weigh the embedding medium and heat it to 35°C;

[0105] Step 2: Put tea powder, glucose and strawberry essence into a paddle mixer, start stirring to mix the materials evenly, and keep the material temperature at 20-25°C;

[0106] Step 3: Turn on the spray gun and spray the embedding agent heated in step 1. The peristaltic pump speed is 15 r / min to obtain decorative tea powder for baking. The spray gun nozzle adopts an air atomizing nozzle with an atomizing pressure of 0.3 MPa. The spray gun is set on the top of the paddle mixer.

[0107] Example 5

[0108] Weigh the raw materials according to the following weight parts, as follows:

[0109] Embedding medium: soybean oil 11g

[0110] Green tea powder: 100g

[0111] Preparation method

[0112] Step 1: Weigh the embedding agent and heat it to 25°C;

[0113] Step 2: Place the tea powder into the fluidized bed and adjust the air volume to 40m 3 / h to suspend the material, the inlet air temperature is 15℃, and the temperature of the tea powder is maintained at 15-20℃;

[0114] Step 3: Turn on the spray gun and spray the embedding agent heated in step 1. The peristaltic pump speed is 10r / min to obtain decorative tea powder for baking. The spray gun nozzle adopts an air atomization nozzle with an atomization pressure of 0.2MPa. The spray gun is set on the top of the fluidized bed.

[0115] Example 6

[0116] Weigh the raw materials according to the following weight parts, as follows:

[0117] Embedding medium: corn oil 30g

[0118] Green tea powder: 100g

[0119] Preparation method

[0120] Step 1: Weigh the embedding agent and heat it to 25°C;

[0121] Step 2: Place the tea powder into the fluidized bed and adjust the air volume to 40m 3 / h to suspend the material, the inlet air temperature is 15℃, and the temperature of the tea powder is maintained at 15-20℃;

[0122] Step 3: Turn on the spray gun and spray the embedding agent heated in step 1. The peristaltic pump speed is 10r / min to obtain decorative tea powder for baking. The spray gun nozzle adopts an air atomization nozzle with an atomization pressure of 0.2MPa. The spray gun is set on the top of the fluidized bed.

[0123] Example 7

[0124] Weigh the raw materials according to the following weight parts, as follows:

[0125] Embedding medium: soybean oil 4g, 51 degree palm oil 7g

[0126] Green tea powder: 100g

[0127] Preparation method

[0128] Step 1: Weigh the embedding agent and heat it to 30°C;

[0129] Step 2: Place the tea powder into the fluidized bed and adjust the air volume to 60m 3 / h to suspend the material, the inlet air temperature is 20℃, and the temperature of the tea powder is maintained at 15-25℃;

[0130] Step 3: Turn on the spray gun and spray the embedding agent heated in step 1. The peristaltic pump speed is 10r / min to obtain decorative tea powder for baking. The spray gun nozzle adopts an air atomizing nozzle with an atomizing pressure of 0.1MPa. The spray gun is set at the bottom of the fluidized bed.

[0131] Comparative Example 1

[0132] Weigh the raw materials according to the following weight parts, as follows:

[0133] Embedding medium: soybean oil 4g, 51 degree palm oil 7g, ethanol 100g

[0134] Green tea powder: 100g

[0135] Preparation method

[0136] (1) Homogenization: Soybean oil, palm oil, 95% ethanol, and tea powder were fully mixed and homogenized by a homogenizer; the speed of the homogenizer was set to 10,000 rpm and the homogenization time was 20 min;

[0137] (2) Drying: The homogenized tea powder mixture is taken out and dried at 60°C for 2 h to obtain moisture-proof tea powder.

[0138] The embedding rate, moisture proof rate, appearance stability and sensory evaluation results of the decorative tea powders obtained in Examples 1-7 and Comparative Example 1 were measured by the following method. The results are shown in Table 2.

[0139] Embedding rate: Tea polyphenols in tea powder can be dissolved in water, but tea powder wrapped in oil cannot be released because it is insoluble in water. Therefore, the content of tea polyphenols can be tested to calculate the embedding rate. The specific method is as follows:

[0140] Pour 50 ml of water into a small beaker of 250 ml, weigh 5.00 g of moisture-proof tea powder, and sprinkle it evenly on the water surface. After leaving it for 5 minutes, filter the solution, collect the filtrate, and detect the content of tea polyphenols in the filtrate, which is recorded as A.

[0141] Weigh the raw tea powder (the weight of the raw tea powder in 5g moisture-proof tea powder, each example and comparative example is converted according to the actual ratio), and measure the tea polyphenol content of the raw tea powder according to the above method, and record it as A 0 , embedding rate = (A 0 –A) / A 0 *100%.

[0142] Moisture-proof rate: Weigh 50.00g of moisture-proof tea powder or ordinary tea powder (tea powder without embedding treatment) respectively, and place it in an open glass culture dish that has been weighed in advance. Put the culture dish containing tea powder in a constant temperature and humidity box at 35℃ and 80% humidity for 24 hours, take it out and weigh the total weight of tea powder and culture dish, and subtract the weight of tea powder and culture dish from the total weight to get the weight of moisture absorbed by tea powder. The moisture absorption weight of ordinary tea powder is recorded as m 0 , record the moisture absorption weight of moisture-proof tea powder as m 1 ,

[0143] Moisture resistance = (m 0 –m 1 ) / m 0 *100%

[0144] Appearance stability: vacuum-pack the moisture-proof tea powder in an aluminum foil bag and place it in a constant temperature and humidity chamber at 35°C and 80% humidity for 30 days to observe whether the appearance of the tea powder changes.

[0145] The taste of the embodiments and comparative examples was evaluated by sensory evaluation. 20 professional sensory evaluators were randomly invited to set up a single-person tasting room according to the requirements of GB / T13868-2009. The evaluators performed sensory evaluation on the numbered samples and qualitatively described the taste and smell of the samples through descriptive sensory analysis. The results are shown in Table 2.

[0146] Table 2 Test results of various indicators of Examples 1-7 and Comparative Example 1

[0147]

[0148]

[0149] As can be seen from Table 2, the embedding rate of the decorative tea powder obtained in Examples 1-7 of the present invention is above 48%, and the tea aroma is rich. Furthermore, Examples 1-4 use a specific plant oil mixed with 51-degree palm oil and soybean oil, corn oil or 24-degree palm oil, and the embedding rate and moisture-proof rate of the obtained decorative tea powder are further improved, while the appearance is more stable, and the moisture-proof tea powder has a delicate taste; further, Example 2 uses 52-degree palm oil and corn oil, and Example 3 uses a plant oil mixed with 51-degree palm oil and 24-degree palm oil, and the embedding rate can reach more than 80%, and the moisture-proof rate can reach more than 70%. However, the embedding rate of the decorative tea powder obtained by the comparative example 1 using the ethanol miscibility method is only 43.09%, the appearance stability is poor, the granularity is strong, the tea aroma is light and accompanied by a light alcohol taste.

[0150] Compared with Example 5 which uses all soybean oil as the embedding agent, Example 1 uses soybean oil and 51-degree palm oil as the embedding agent, and the embedding effect and moisture-proof effect are further improved, and the moisture-proof tea powder obtained has a stable appearance and a delicate taste; compared with Example 6 which uses all corn oil as the embedding agent, Example 2 uses corn oil and 51-degree palm oil as the embedding agent, and the embedding effect and moisture-proof effect are further improved, and the moisture-proof tea powder obtained has a stable appearance and a delicate taste.

[0151] Compared with Example 7 in which the spray gun is arranged at the bottom of the fluidized bed, in Example 1, the spray gun is arranged at the top of the fluidized bed, and the embedding agent is sprayed downward from the top, so that the embedding agent and the tea powder can be mixed more evenly, and the embedding effect and moisture-proof effect are further improved. The moisture-proof tea powder obtained has a stable appearance and a delicate taste.

[0152] Experimental Example 1

[0153] The decorative tea powders prepared in Examples 1-7 of the present invention and Comparative Example 1 were applied to donuts.

[0154] 2.5 g of the decorative tea powders prepared in Examples 1-7 of the present invention and Comparative Example 1 were sprinkled on the surface of fresh donuts respectively, and placed in a constant temperature and humidity chamber at 35° C. and 80% humidity for 12 hours to observe whether the tea powders on the surface of the donuts were dissolved. Figure 1 A photo of the donuts just sprinkled with tea powder for decoration. Figure 2 This is a photo of the donuts sprinkled with decorative tea powder after 12 hours. Figure 1 It can be seen that the decorative tea powder is sprinkled on the surface of the donuts to form a good tea powder decorative effect. Figure 2 It can be seen that after 12 hours in a constant temperature and humidity chamber at 35°C and 80% humidity, the decorative effect of the donuts with the decorative tea powder of Examples 1-4 was basically unchanged, while the decorative effect of the donuts with the decorative tea powder of Examples 5-7 and Comparative Example 1 was significantly deteriorated, indicating that the moisture-proof decorative tea powder prepared by the specific oil combination of the present invention has better moisture-proof performance under high temperature and high humidity environment.

[0155] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A decorative tea powder for baking, It is characterized in that The decorative tea powder for baking comprises 100 parts of tea powder and 11-30 parts of embedding agent by weight; The decorative tea powder for baking is prepared by spraying an embedding agent onto the suspended tea powder for embedding.

2. The decorative tea powder for baking according to claim 1, It is characterized in that The decorative tea powder for baking comprises 100 parts of tea powder and 20-30 parts of embedding agent by weight.

3. The decorative tea powder for baking according to claim 1 or 2, It is characterized in that The embedding agent is vegetable oil; Preferably, the solidification point of the vegetable oil is 24-51° C., and the vegetable oil is preferably selected from one or a combination of two or more of soybean oil, rapeseed oil, corn oil, palm oil and peanut oil; More preferably, the vegetable oil is a mixture of 51-degree palm oil and one or more of 24-degree palm oil, corn oil or soybean oil. Preferably, the vegetable oil is 51-degree palm oil and 24-degree palm oil or 51-degree palm oil and corn oil; more preferably, the mass ratio of 51-degree palm oil to one or more of 24-degree palm oil, corn oil or soybean oil is 1:5-5:1, preferably 1:5-2:1; Further preferably, the vegetable oil is 51 degree palm oil and 24 degree palm oil and / or corn oil, preferably the mass ratio of 51 degree palm oil to 24 degree palm oil and / or corn oil is 1:1-1:4, preferably 1:2-1:

3.

4. The baking decorative tea powder according to any one of claims 1 to 3, It is characterized in that The baking decorative tea powder further comprises a first auxiliary material and / or a second auxiliary material. Preferably, the first auxiliary material is a sweetener and / or a flavor, more preferably, in parts by weight, the sweetener is 10-80 parts, and preferably the flavor is 0.001-0.1 parts; And / or, the second auxiliary material is a pigment, preferably, the pigment is 0.01-0.05 parts by weight.

5. A method for preparing the decorative tea powder for baking according to any one of claims 1 to 4, It is characterized in that The method comprises the following steps: spraying an embedding agent onto the suspended tea powder for embedding to obtain the decorative tea powder for baking.

6. The preparation method according to claim 5, It is characterized in that The preparation method comprises the following steps: (1) suspending tea powder in a fluidized bed or paddle mixer, and adding the first auxiliary material as needed; (2) Control the temperature of tea powder to 10-25°C; (3) heating the embedding agent to melt it, and adding the second auxiliary material as needed; (4) Spraying the embedding agent into a fluidized bed or paddle mixer in which tea powder is suspended to obtain the decorative tea powder for baking.

7. The preparation method according to claim 5 or 6, It is characterized in that In step (3), the heating temperature of the embedding agent is 25-35°C.

8. The preparation method according to any one of claims 5 to 7, It is characterized in that In step (4), the embedding agent is sprayed into the fluidized bed or paddle mixer from the top; Preferably, the spraying is performed using an air atomizing nozzle, more preferably the air pressure during spraying is 0.1-0.3 MPa, further preferably, the rotation speed of the peristaltic pump during spraying the embedding agent is 10-20 rpm / min, and further preferably, the air inlet temperature of the fluidized bed is 10-25°C.

9. Use of the decorative tea powder for baking according to any one of claims 1 to 4 or the decorative tea powder for baking prepared by the preparation method according to any one of claims 5 to 8 in food, preferably in baked food.

10. A donut containing the baking decorative tea powder according to any one of claims 1 to 4 or the baking decorative tea powder prepared by the preparation method according to any one of claims 5 to 8, It is characterized in that The method is prepared by sprinkling the baking decorative tea powder on the surface of the donut.

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