The method comprises the following steps: extracting
prolamin from vital
gluten by using a 65%
ethanol solution according to a
solid-
liquid ratio of 1: 30 (g: mL), wherein the stirring temperature is 30 DEG C and the stirring time is 3 hours; and carrying out rotary
evaporation on the supernate to remove
ethanol, refrigerating, precipitating and
drying to obtain the
alcohol-soluble
protein. The method comprises the following steps: mixing
amylose with a 20% NaCl solution according to a ratio of 1: 5 (g: mL), carrying out eutectic
crystallization at 4 DEG C for 36 h, washing with water for 3-5 times, and
drying the obtained precipitate at 50-60 DEG C to obtain the eutectic
amylose. 8% and 2-10% of the flour are respectively added into the flour to prepare mixed
powder, the addition amount of the
yeast is 1-5% of the amount of the mixed
powder, the addition amount of the table salt is 0.5-3% of the amount of the flour, the
yeast and the table salt are sequentially added into the mixed
powder, the mixed powder is dipped in
warm water and stirred uniformly, and the mixed powder is prepared. And kneading dough, fermenting at normal temperature, kneading to form strips, and frying to obtain the fried dough twist with high crispness.