Cooking Steps

1. 

   Step1:Preparatio

2. 

   Step2:Separate the yolk and the egg white. Add sugar, oil, milk and flour to the yolk, and mix well to make the yolk paste.

3. 

   Step3:Add a few drops of white vinegar to the egg white, add sugar three times, and whisk until the egg beater is hard foaming.

4. 

   Step4:Preheat oven to 130 degrees. Whisk the egg white quickly with the yolk paste (pay attention to the technique, be careful of defoaming).

5. 

   Step5:Oven 130 ℃. Place the second layer from the bottom for 70 minutes.