Cooking Steps

1. 

   Step1:Separate the protein and yolk into two oil-free and anhydrous container

2. 

   Step2:Add milk and corn oil into the yolk and mix well. Fully emulsif

3. 

   Step3:Sift in low powder. Cocoa powder. Stir in zigzag pattern evenly

4. 

   Step4:Mixed egg yolk past

5. 

   Step5:Add lemon juice to the egg whites. Use the eggbeater to make fish eye bleb at a low speed. Add one third of the fine sugar. Then continue to beat until it is delicate. Add the second white sugar. Then continue to beat until it has obvious lines. Add the third fine sugar. Beat until the eggbeater has sharp corners

6. 

   Step6:Take one third of the protein and add it to the yolk paste and mix well. Then mix well in the poured protein

7. 

   Step7:Pour it into the baking pan. Scrape it with a scraper. Shake it gently for a few times. Shake out the big bubbles. Preheat the oven at 160 ℃ for 6 minutes. Bake in the middle for 20 minutes

8. 

   Step8:Put it on the baking net after it is out of the oven. Tear off the oiled paper. Put it in the warm place. Take a clean oiled paper again. Put the cake on the oiled paper and roll it up. Set it for 15 minutes. Cool it and cut into sections