Preheat the oven to 180°C (356°F)
In a bowl, mix eggs and sugar
Sift in flour, cocoa powder, and baking powder
Add melted butter and milk, mixing well until combined
Pour the batter into a cake mold
Bake in the preheated oven at 180°C for 25 minutes
After cooling, remove from the mold and decorate with chocolate cream or cocoa powder