Brewing technology of purple sweet potato yellow wine;

1. Raw material treatment: after picking out the diseased and rotten potatoes, clean the fresh purple potatoes, slice or dice them, and dry them in the sun (oven).

2. Soak the dried purple potato in clear water for 8- 12 hours, and cook the purple potato into purple potato rice.

3. Cool the purple sweet potato rice to about 33 degrees, add yellow wine koji, stir well, and put it in a tank for saccharification.

4. After saccharification, add cold boiled water or glutinous rice wine (Chai Shu wine) according to a certain proportion.

And 5, filtering, squeezing, clarifying, siphoning and sterilizing after fermentation to obtain the finished purple sweet potato yellow wine.