Chocolate Cake
1.
Add the egg whites with lemon juice and salt
2.
Divide the egg whites into three times and add the fine sugar
3.
Beat the egg whites until the egg whites are slightly hooked
4.
Add cake flour, cornstarch and chocolate chips to the egg whites
5.
Put the egg white paste into the mold, and heat the oven up and down to 185 degrees, and the baking time is 25 minutes.
Tips:
Don't beat the egg whites too hard, dark chocolate is best.