1. Separate the white and egg yolk, put fine sugar in the white, beat with a whisk until dry foaming
2. Butter and milk melted after heating
3. Pour into the egg yolk and beat evenly with a manual whisk
4. Mix low flour and cocoa powder through a sieve, put in the egg yolk, and stir with a spatula to form a custard without particles
5. Take 1/3 of the egg white and pour it into the egg yolk paste, stir evenly
6. Then mix all the egg whites and egg yolks and mix into a uniform cake batter
7. Pour the mixed batter into the waffle mold
8. Put it in the middle of the preheated oven, bake at 170°C for 25 minutes, take it out and let it cool, then demould and decorate.
