Preparation method of purple sweet potato powder

Abstract

The invention discloses a preparation method of purple sweet potato powder. The preparation method includes the following specific steps: 1, washing, wherein purple sweet potatoes are washed with clean water; 2, peel removing, wherein the peel of the purple sweet potatoes are removed completely with a bamboo knife; 3, slicing, wherein the peeled purple sweet potato in the step 2 is sliced with a vegetable slicer into purple sweet potato slices; 4, color protection, wherein the purple sweet potato slices are placed in a sodium chloride solution with the concentration of 0.6% for 5-8 min, and the solution is slightly stirred with a stirring rod; 5, drying, wherein the purple sweet potato slices are placed in a drying oven; 6, crushing, wherein the purple sweet potato slices dried in the step 5 is crushed in a hammer piece type crusher, the fineness of the crushed purple sweet potato is 50-100 meshes, and the purple sweet potato powder is prepared; 7, packaging, wherein the purple sweet potato powder obtained after crushing in the step 6 is packaged into a bag. The obtained purple sweet potato powder has the advantages of being healthy, safe, and good in color protection effect.

Description

technical field [0001] The invention relates to a preparation method of purple potato flour, which is applied in the technical field of purple potato flour preparation. Background technique [0002] Purple potato is also called black potato, and the potato flesh is purple to dark purple. In addition to the nutrients of ordinary sweet potatoes, it is also rich in selenium and anthocyanins. Purple sweet potato is one of the main raw materials of anthocyanins, which is rich in protein, starch, pectin, cellulose, amino acids, vitamins and various minerals, as well as selenium and anthocyanins. Purple sweet potato is rich in nutrients and has special health care functions. The protein and amino acids in it are easily digested and absorbed by the human body. The vitamin A rich in it can improve eyesight and the mucosal epithelial cells of the skin. Vitamin C can make collagen protein synthesize normally and prevent the occurrence of scurvy. Anthocyanins are natural and powerful ...

AI Technical Summary

Problems solved by technology

[0004] The color of purple sweet potato is purple. In the process of making some pastries, the pastry is decorated with the color of purple sweet potato itself, so there is no need to add pigments to improve the color, so that the prepared pastry reduces the risk of safety hazards to the human body. During the production process of traditional purple sweet potato powder, the color of purple sweet potato will gradually fade, which will affect the decorative effect