An onion compressed sugar sheet and a method for preparing the same

Abstract

The application discloses an onion compressed sugar tablet and a preparation method thereof, and belongs to the technical field of flavor food, which comprises 70-75 parts of onion powder, 20-25 parts of yam powder, 2-6 parts of radix astragali powder, 1-3 parts of American ginseng powder, 40-45 parts of water, 5-10 parts of sucrose and 5-10 parts of erythritol, wherein the onion powder is obtained by grinding onion after freeze-drying. The application adopts the above-mentioned onion compressed sugar tablet and the preparation method thereof, and through reasonable formula design and process optimization, effective reservation of active ingredients of various raw materials is ensured, and the application has both nutritional function and good palatability, and can be accepted by more people.

Description

Technical Field

[0001] This invention relates to the field of flavored food technology, and in particular to a compressed onion sugar tablet and its preparation method. Background Technology

[0002] Onions, as a common food and medicine ingredient, are rich in quercetin, a natural flavonoid compound with various medicinal values ​​such as anti-oxidation, anti-inflammation, and blood lipid regulation. They have shown good application potential in improving human metabolism and enhancing the body's immunity, and therefore have received widespread attention from the food and medicine fields.

[0003] However, onions have a strong, pungent odor, and when eaten directly, they have a spicy and irritating taste. Some people (such as children and those with sensitive stomachs) have a low tolerance for this odor, which greatly limits the widespread use of onions in everyday foods. To solve this problem, related technical fields usually process onions into onion powder to weaken their pungent odor and make them easier to add to various foods. However, onion powder contains a certain amount of polysaccharides and moisture, which makes it prone to absorbing moisture and clumping. This not only affects the flowability and mixing uniformity of the powder but also makes subsequent processing and shaping difficult, thereby reducing the stability of product quality.

[0004] Therefore, there is an urgent need to develop a food form that combines nutritional functionality with good palatability. At the same time, through reasonable formula design and process optimization, the stability of the active ingredients of each raw material and the product molding effect should be guaranteed to meet the public's demand for healthy and convenient food. Summary of the Invention

[0005] The purpose of this invention is to provide an onion compressed sugar tablet and its preparation method. Through reasonable formula design and process optimization, the active ingredients of each raw material are effectively preserved, which combines nutritional functionality and good palatability, and can be accepted by a wider range of people.

[0006] To achieve the above objectives, the present invention provides an onion compressed sugar tablet, comprising 70-75 parts onion powder, 20-25 parts yam powder, 2-6 parts astragalus powder, 1-3 parts American ginseng powder, 40-45 parts water, 5-10 parts sucrose, and 5-10 parts erythritol; the onion powder is obtained by grinding freeze-dried onions.

[0007] Preferably, the process parameters for freeze-drying onions are as follows: pre-freezing temperature -35℃~-40℃, holding temperature for 2~3 hours; sublimation drying stage vacuum degree controlled at 10~30Pa, temperature -25℃~-15℃, drying time 10~12 hours; desorption drying stage temperature 25~35℃, vacuum degree 5~15Pa, drying time 4~6 hours.

[0008] Preferably, the onion powder has a particle size of 100~125μm and a moisture content of ≤3%.

[0009] Preferably, the particle size of the yam powder is 100~150μm.

[0010] Preferably, the particle size of Astragalus powder is 80~120μm.

[0011] Preferably, the particle size of American ginseng powder is 80~120μm.

[0012] This invention also provides a method for preparing compressed onion tablets, comprising the following steps: S1. Mix the onion powder obtained by freeze-drying and grinding with yam powder, astragalus powder, American ginseng powder and sucrose, stir, and pass through a 100-mesh sieve to obtain a dry mixture; S2. Spray water into the dry mixture and stir to obtain a wet mixture; S3. Pass the wet mixture through a 12-mesh sieve to obtain granules. Dry the granules and compress them into tablets to obtain unprocessed tablets. S4. Mix erythritol with water, heat, cool to obtain a sugar coating solution, spray the sugar coating solution onto the surface of the unprocessed tablets for coating, and dry to obtain compressed onion sugar tablets.

[0013] Preferably, in S1, the stirring speed is 150~200 rpm and the stirring time is 10~15 min.

[0014] Preferably, in S2, the water spraying speed is 2.5~3 mL / min, the stirring speed is 80~120 rpm, and the stirring time is 3~5 min.

[0015] Preferably, in S3, the particle size is 1.2~1.8mm, the drying temperature is 55~65℃, the drying time is 90~110min, the moisture content after drying is 3%~3.5%, and the weight of the tablet is 0.3~0.6g / tablet.

[0016] Preferably, in step S4, the heating temperature is 120~125℃, the cooling temperature is 20~25℃, the spraying speed of the sugar coating liquid is 2~3mL / min, and the ratio of the amount of water in step S4 to the amount of water in step S2 is 3~3.5:1.

[0017] Therefore, the present invention, employing the above-mentioned onion compressed sugar tablets and their preparation method, has the following beneficial effects: (1) The onion compressed sugar tablets provided by the present invention have good palatability. The freeze-dried onion powder has a mild odor. Furthermore, by compounding pure plant powders without adding additives and combining them with sugar coating process, the pungent odor and taste of onions are significantly weakened, making them more acceptable to a wider range of people.

[0018] (2) This invention uses freeze-dried onion powder as the main raw material. The freeze-drying process is carried out under low temperature and vacuum conditions, which can minimize the degradation and oxidation of heat-sensitive active ingredients in onions (such as quercetin and thiosulfinates). The quercetin retention rate is significantly improved compared with hot-air dried onion powder. At the same time, the formula is compounded with yam powder, astragalus powder, and American ginseng powder, which fully retains a variety of natural active ingredients such as astragaloside A and ginsenosides, realizing the diversified synergistic effects of multiple nutritional functions such as strengthening the spleen and stomach, replenishing qi and raising yang, and nourishing qi and yin, significantly improving the health value of the product.

[0019] (3) The present invention uses freeze-dried onion powder with a moisture content of ≤3% and a particle size of 100-125μm. The powder is loose and porous, has good flowability, and is not prone to moisture absorption and clumping, which is conducive to uniform mixing with raw materials such as yam powder, astragalus powder, and American ginseng powder. On this basis, by adding yam powder with good molding properties, the overall flowability and compressibility of the raw materials are further improved. Combined with optimized granulation and tableting processes, the molding quality and batch stability of the tablets are effectively improved.

[0020] The technical solution of the present invention will be further described in detail below through embodiments. Detailed Implementation

[0021] The technical solution of the present invention will be further described below through embodiments.

[0022] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0023] In this invention, unless otherwise specified, the test materials and instruments are all conventional test materials in the field and can be purchased through commercial channels.

[0024] Example 1 A type of compressed onion sugar tablet comprises 72 parts onion powder, 22 parts yam powder, 4 parts astragalus powder, 2 parts American ginseng powder, 42 parts water, 8 parts sucrose, and 5 parts erythritol; the onion powder is obtained by grinding freeze-dried onions.

[0025] The onion powder has a particle size of 125μm and a moisture content of 3%. The particle size of yam powder is 150μm; The particle size of Astragalus powder is 100μm; The particle size of American ginseng powder is 100μm.

[0026] The preparation method of the above-mentioned compressed onion tablets includes the following steps: S1. Fresh onions are peeled, washed, and sliced, then placed in a vacuum freeze-drying equipment for freeze-drying. The specific process parameters are: pre-freezing temperature -35℃, holding time 2.5h; sublimation drying stage vacuum degree controlled at 20Pa, temperature at -20℃, drying time 12h; desorption drying stage temperature 30℃, vacuum degree 10Pa, drying time 5h, until the material moisture content ≤3%; the freeze-dried onion slices are crushed and sieved to obtain onion powder with a particle size of 125μm; the onion powder, yam powder, astragalus powder, American ginseng powder and sucrose are mixed and stirred at 180rpm for 12min to ensure uniform mixing without lumps, and then passed through a 100-mesh sieve to obtain a dry mixture; S2. Spray 10 portions of water into the dry mixture at a rate of 3 mL / min, and stir at a speed of 100 rpm for 5 min to obtain a wet mixture; S3. Pass the wet mixture through a 12-mesh sieve to form granules with a particle size of 1.4 mm. Dry the granules at 60°C for 100 min to control the moisture content at 3%. Then clean the tableting mold, adjust the tableting machine, and compress the tablets. Set the tablet weight to 0.5 g / tablet to obtain unprocessed tablets. S4. Mix erythritol with 32 parts water, heat to 120°C, stir until erythritol is completely dissolved, turn off the heat and cool to 25°C to obtain a sugar coating solution; put the uncoated slices into a coating pan, preheat to 30°C, spray the sugar coating solution onto the surface of the uncoated slices at a speed of 3 mL / min for coating, dry for 15 minutes after coating until the surface is smooth, without pits and the color is uniform to obtain onion compressed sugar slices.

[0027] Example 2 A type of compressed onion sugar tablet comprises 70 parts onion powder, 25 parts yam powder, 2 parts astragalus powder, 3 parts American ginseng powder, 40 parts water, 5 parts sucrose, and 8 parts erythritol; the onion powder is obtained by grinding freeze-dried onions.

[0028] The onion powder has a particle size of 125μm and a moisture content of 3%. The particle size of yam powder is 150μm; The particle size of Astragalus powder is 100μm; The particle size of American ginseng powder is 100μm.

[0029] The preparation method of the above-mentioned compressed onion tablets includes the following steps: S1. Fresh onions are peeled, washed, and sliced, then placed in a vacuum freeze-drying equipment for freeze-drying. The specific process parameters are: pre-freezing temperature -35℃, holding time 2.5h; sublimation drying stage vacuum degree controlled at 20Pa, temperature at -20℃, drying time 12h; desorption drying stage temperature 30℃, vacuum degree 10Pa, drying time 5h, until the material moisture content ≤3%; the freeze-dried onion slices are crushed and sieved to obtain onion powder with a particle size of 125μm; the onion powder, yam powder, astragalus powder, American ginseng powder and sucrose are mixed and stirred at 150rpm for 15min to ensure uniform mixing without lumps, and then passed through a 100-mesh sieve to obtain a dry mixture; S2. Spray 10 portions of water into the dry mixture at a rate of 2.5 mL / min, and stir at a speed of 120 rpm for 3 min to obtain a wet mixture; S3. Pass the wet mixture through a 12-mesh sieve to form granules with a particle size of 1.4 mm. Dry the granules at 65°C for 90 minutes to control the moisture content at 3%. Then clean the tableting mold, adjust the tableting machine, and compress the tablets. Set the tablet weight to 0.5 g / tablet to obtain unprocessed tablets. S4. Mix erythritol with 30 parts water, heat to 125°C, stir until erythritol is completely dissolved, turn off the heat and cool to 20°C to obtain a sugar coating solution; put the unsalted slices into a coating pan, preheat to 30°C, spray the sugar coating solution onto the surface of the unsalted slices at a speed of 3 mL / min for coating, dry for 15 minutes after coating until the surface is smooth, without pits and the color is uniform to obtain onion compressed sugar slices.

[0030] Example 3 A type of compressed onion sugar tablet comprises 75 parts onion powder, 20 parts yam powder, 6 parts astragalus powder, 1 part American ginseng powder, 45 parts water, 10 parts sucrose, and 10 parts erythritol; the onion powder is obtained by grinding freeze-dried onions.

[0031] The onion powder has a particle size of 125μm and a moisture content of 3%. The particle size of yam powder is 150μm; The particle size of Astragalus powder is 100μm; The particle size of American ginseng powder is 100μm.

[0032] The preparation method of the above-mentioned compressed onion tablets includes the following steps: S1. Fresh onions are peeled, washed, and sliced, then placed in a vacuum freeze-drying equipment for freeze-drying. The specific process parameters are as follows: pre-freezing temperature -35℃, holding time 2.5h; sublimation drying stage vacuum degree controlled at 20Pa, temperature at -20℃, drying time 12h; desorption drying stage temperature 30℃, vacuum degree 10Pa, drying time 5h, until the material moisture content ≤3%; the freeze-dried onion slices are crushed and sieved to obtain onion powder with a particle size of 125μm; the onion powder, yam powder, astragalus powder, American ginseng powder and sucrose are mixed and stirred at 200rpm for 10min to ensure uniform mixing without lumps, and then passed through a 100-mesh sieve to obtain a dry mixture; S2. Spray 10 portions of water into the dry mixture at a rate of 3 mL / min, and stir at a speed of 80 rpm for 5 min to obtain a wet mixture; S3. Pass the wet mixture through a 12-mesh sieve to form granules with a particle size of 1.4 mm. Dry the granules at 55°C for 110 min to control the moisture content at 3%. Then clean the tableting mold, adjust the tableting machine, and compress the tablets. Set the tablet weight to 0.5 g / tablet to obtain unprocessed tablets. S4. Mix erythritol with 35 parts water, heat to 122°C, stir until erythritol is completely dissolved, turn off the heat and cool to 20°C to obtain a sugar coating solution; put the plain slices into a coating pan, preheat to 30°C, spray the sugar coating solution onto the surface of the plain slices at a speed of 3 mL / min for coating, dry for 15 minutes after coating until the surface is smooth, without pits and the color is uniform to obtain onion compressed sugar slices.

[0033] Flavor and mouthfeel tests were conducted on the onion compressed sugar tablets prepared in Examples 1-3. A fuzzy mathematical sensory evaluation method was used, with a scoring standard of 3 points for aroma, 5 points for mouthfeel, and 2 points for aftertaste. The passing score was 8 points. A blind evaluation was conducted by a group of 10 people, and the average score was taken. The results are shown in Table 1. Table 1 shows that the comprehensive scores of the onion compressed sugar tablets prepared in Examples 1-3 all exceeded 8 points, and the differences in comprehensive scores were small. This indicates that the medicinal and edible homology formula and sugar coating process of these onion compressed sugar tablets significantly weaken the pungent taste of onions, resulting in good overall palatability and meeting the consumption needs of target groups such as children and those with sensitive stomachs.

[0034] Table 1. Flavor and texture of the onion compressed sugar tablets prepared in Examples 1-3

[0035] The contents of quercetin, astragaloside A, and ginsenosides in the onion compressed sugar tablets prepared in Examples 1-3 were tested, and the results are shown in Table 2. Table 2 shows that the onion compressed sugar tablets prepared in Examples 1-3 effectively retained the activity of quercetin, astragaloside A, and ginsenosides, and the compound formula achieved diversified and synergistic nutritional functions.

[0036] Table 2. Content of functional active ingredients in the onion compressed sugar tablets prepared in Examples 1-3

[0037] Twenty to thirty volunteers with sensitive stomachs were selected and divided into three groups. Each group consumed the onion compressed tablets prepared in Examples 1-3. During the experiment, no gastrointestinal medications or supplements were taken, and a light diet was maintained. One tablet was consumed after breakfast and dinner daily for seven days, and gastrointestinal reactions were recorded daily. Observations and records showed that none of the volunteers experienced bloating or abdominal pain, indicating that the onion compressed tablets prepared in Examples 1-3 met the palatability design objectives.

[0038] Therefore, the present invention adopts the above-mentioned onion compressed sugar tablets and its preparation method. Through reasonable formula design and process optimization, the active ingredients of each raw material are effectively preserved, which not only has nutritional functionality but also good palatability and can be accepted by a wider range of people.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A type of compressed onion candy tablet, characterized in that: The ingredients include 70-75 parts onion powder, 20-25 parts yam powder, 2-6 parts astragalus powder, 1-3 parts American ginseng powder, 40-45 parts water, 5-10 parts sucrose, and 5-10 parts erythritol. Onion powder is obtained by grinding freeze-dried onions.

2. The onion compressed candy tablets according to claim 1, characterized in that: The onion powder has a particle size of 100~125μm and a moisture content of ≤3%.

3. The onion compressed candy tablets according to claim 1, characterized in that: The particle size of yam powder is 100~150μm.

4. The onion compressed candy tablets according to claim 1, characterized in that: The particle size of Astragalus powder is 80~120μm.

5. The onion compressed candy tablets according to claim 1, characterized in that: The particle size of American ginseng powder is 80~120μm.

6. A method for preparing an onion compressed candy tablet according to any one of claims 1-5, characterized in that: Includes the following steps: S1. Mix the onion powder obtained by freeze-drying and grinding with yam powder, astragalus powder, American ginseng powder and sucrose, stir, and pass through a 100-mesh sieve to obtain a dry mixture; S2. Spray water into the dry mixture and stir to obtain a wet mixture; S3. Pass the wet mixture through a 12-mesh sieve to obtain granules. Dry the granules and compress them into tablets to obtain unprocessed tablets. S4. Mix erythritol with water, heat, cool to obtain a sugar coating solution, spray the sugar coating solution onto the surface of the unprocessed tablets for coating, and dry to obtain compressed onion sugar tablets.

7. The method for preparing an onion compressed sugar tablet according to claim 6, characterized in that: In S1, the stirring speed is 150~200 rpm and the stirring time is 10~15 min.

8. The method for preparing an onion compressed sugar tablet according to claim 6, characterized in that: In S2, the water spraying speed is 2.5~3 mL / min, the stirring speed is 80~120 rpm, and the stirring time is 3~5 min.

9. The method for preparing an onion compressed sugar tablet according to claim 6, characterized in that: In S3, the particle size is 1.2~1.8mm, the drying temperature is 55~65℃, the drying time is 90~110min, the moisture content after drying is 3%~3.5%, and the weight of the tablet is 0.3~0.6g / tablet.

10. The method for preparing an onion compressed sugar tablet according to claim 6, characterized in that: In S4, the heating temperature is 120~125℃, the cooling temperature is 20~25℃, the spraying speed of the sugar coating liquid is 2~3mL / min, and the ratio of water used in S4 to water used in S2 is 3~3.5:1.

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