Mulberry nuts and preparation method thereof

Abstract

The invention discloses mulberry nuts and a preparation method of the mulberry nuts. The preparation method comprises the steps of quickly freezing mulberry raw materials, then defreezing the mulberry raw materials, performing infrared drying to obtain mulberry semifinished products, then performing variable-temperature differential pressure puffing drying, and cooling products to room temperature to obtain the mulberry nuts. According to the method for producing the mulberry nuts by combining medium and short-wave infrared and a variable-temperature differential pressure puffing drying method, no pigments or other additives are added in an operating process; the products taste crispy; the color of the original fruit is retained to a large extent; the mulberry nuts have mellow mulberry flavor.

Description

technical field [0001] The invention belongs to the field of food processing, and relates to a crisp mulberry fruit and a preparation method thereof. Background technique [0002] Mulberry belongs to the aggregated fruit of perennial herb mulberry, commonly known as mulberry, sweet and juicy, and its nutritional content is higher than that of common fruits. Rich in sugars, phenols and B vitamins, it has the effects of anti-aging, prolonging life, nourishing liver and kidney, and nourishing qi and blood. In recent years, the deep processing of mulberry has become one of the new directions of the berry industry, and the drying technology of mulberry has also become a research hotspot for scientific and technical personnel. [0003] The drying history of my country's mulberry is long, and people just adopt natural drying method to spread the mulberry that arrives in the sun and dry or naturally air-dry since ancient times. The natural drying method is greatly affected by the ...

AI Technical Summary

Problems solved by technology

However, these single drying methods have their own advantages, disadvantages and limitations: hot air drying equipment requires simple, uniform drying of materials but a relatively long production cycle; medium and short-wave infrared drying is faster than hot air drying, but its penetrating ability is not strong. The heating speed is slow, and the surface of the material is easy to burn in the later stage of drying; the heating of the microwave drying material is uneven, and the product is easy to crack; the production cycle of variable temperature and pressure difference puffing drying is short, and the product is good, but there are certain requirements for the moisture content of the material Generally, it needs to be pre-dried to remove a certain amount of water; vacuum drying equipment is expensive and dry slowly; vacuum freeze-dried products have the best quality, but the energy consumption is huge and the drying time is long

Medium and short-wave infrared drying has the characteristics of speed-up and energy-saving, but the product shrinks severely in the later stage of drying, and the hardness and nutrient loss are relatively large.

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