Cooking Steps

1. 

   Step1:Separate albumen, egg yolk protein and lemon juice, add sugar in three times and beat until almost dry foaming, as shown in the figur

2. 

   Step2:Add oil and milk to the yolk in turn, stir well, then sift in low gluten flour and mix wel

3. 

   Step3:Take two thirds of the protein and mix it in the yolk paste evenl

4. 

   Step4:Pour the batter into the remaining protein and mix wel

5. 

   Step5:Cocoa powder should be boiled with a little hot water in advance, and a small part of the batter should be mixed evenly

6. 

   Step6:Pour cocoa batter into the original batter and mix it at wil

7. 

   Step7:Pour into the mold and shake out large bubble

8. 

   Step8:Preheat the oven 160 degrees in advance and heat it up and down for 40 minute

9. 

   Step9:Take it out and turn it upside down for cooling and demouldin