Beat 4 eggs with 1 cup sugar and vanilla, then add 1 cup flour mixed with 1/2 teaspoon baking powder.
In another bowl, beat 4 eggs with 1 coffee cup sugar, then add 2 tablespoons cocoa, 2 coffee cups crushed walnuts, 1 coffee cup flour, and 1/2 teaspoon baking powder.
In a baking tray lined with parchment paper, alternate spoonfuls of the yellow and brown mixtures until finished.
Bake as you would a cake. Prepare a syrup with 2 cups water and 1 cup sugar, optionally adding 1-2 tablespoons of rum/brandy, and boil for 5-8 minutes.
Once cooled, lightly soak the cake with the syrup on both sides.
Cover the cooled cake with a glaze made from 1 cup sugar, 2 tablespoons cocoa, 4 tablespoons fresh milk, and 1 packet of butter.
Decorate with colored sprinkles or walnuts as desired and let it rest for a few hours before serving.