Step1:Separate the egg white and egg yolk. Beat the egg white and sugar three times. Finally, add starch to the hard egg yolk. Beat for 2 minutes. Beat with water for 2 minutes. Beat with corn oil for 2 minutes. Beat with low score for 2 minutes. Mix half the beaten egg white. Then add the rest. Beat it into 2 parts. Add the cocoa powder. Pour one layer into the container and put it into the oven for 17 minutes Bake at 5 degrees for 2830 minutes, and then coat with butte
Cooking tips:There are skills in making delicious dishes.