Choose fresh raw materials, with proper color and intact skin with no decay.
Cleaning and blanching raw materials in clear hot water. Soaking the cool down raw materials in maltose solution with certain percentage proportion. Take out the sugar-soaked raw materials, fully drain them, and quickly freeze at -18℃. Evenly pack the quick-frozen ingredients into material cages, with 120kg in each pot. The oil temperature of Lentinus edodes is 85~90℃ and the vacuum degree is below -0.095MPa. When frying, observe from the observation hole and de-oiled