Sponge cake soaked in condensed milk.

3 eggs
0.5 tablespoon of sugar
0.5 teaspoon of baking powder
vanillin
3 tablespoons of flour

Preheat the oven to 200 degrees
Beat the eggs with the sugar until thick foam, add flour, vanillin, baking powder. Mix everything carefully. Line the baking sheet with greased paper and pour the prepared dough evenly. Bake for 5-10 minutes, depending on the oven. Then cool the finished biscuit, soak with condensed milk, sprinkle with cocoa, cut into equal squares and carefully stack them.
_______________________