Cooking Steps

1. 

   Step1:Egg yolk protein separatio

2. 

   Step2:Add oil to the yolk. Add sugar, oil and pure milk to the yolk. Sift and add low gluten flour. Stir in zigzag pattern

3. 

   Step3:Drop a few drops of white vinegar into the egg whites. Whisk the egg beater at a medium speed. Add 25 grams of sugar in three times to make it hard to foam

4. 

   Step4:One third of the egg white is put into the yolk bowl. Mix it up and down. Pour it back into the egg white paste. Continue mixing

5. 

   Step5:Preheat the oven in advance. Pour the mixed cake paste into the grinding tool. Shake it gently. Put it into the oven. Bake for 40 minutes at 120 degrees

6. 

   Step6:Out of the pot, turn it upside down. Cool it and release i