Chocolate cake roll

1. Prepare all the ingredients first, and then separate the egg white and yolk

2. In a bowl of egg white without water or oil, beat it vigorously until it forms coarse bubbles. Add half of the sugar and continue to beat until it becomes slightly firm and foamy. Add all the sugar and beat until it doesn't fall off. That's it

3. Egg Yolk Paste: Mix milk and oil evenly, smooth and oil-free. Add egg yolk and mix evenly. Sift in low gluten flour and cocoa powder and stir well. (Do not use batter, as it may cause gluten.)

4. Take one-third of the egg white and mix it into the egg yolk paste. Stir the mixture evenly by cutting it open in the middle of the container and flipping it from bottom to top. Then pour in all the egg white and stir evenly using the same method. Then pour it into a plate filled with oil paper, shake it a few times to create large bubbles, and bake at 160 degrees for 40 minutes