. Add egg yolk, corn oil, water and then sift in low-gluten flour

2. Use a spatula to mix evenly, do not over-stir, and mix until it is even and fine

3. Add fine sugar to the egg whites in 3 batches, and form a dry foam as shown in the picture.

4. Take 1/3 of the meringue, add the egg yolk paste, and mix evenly.

5. Now add the egg yolk paste that you just mixed, pour it into the remaining meringue, and mix evenly using the stirring technique.

6. Divide the dough into two portions, add cocoa powder to one portion, and use the same stirring technique to mix evenly, just like stir-frying!

7. Become two kinds of batter

8. Place the two kinds of facial masks alternately into the mold, and bake in the oven at 150 degrees for about 40 minutes.

9. After baking the dough, let it cool and turn it upside down. Cut it open and look inside the cake. There will be many colors.