Preheat the oven to 180°C (356°F).
In a bowl, mix flour, cocoa powder, sugar, and baking powder.
Add eggs, milk, and melted butter. Stir until smooth to make the batter.
Pour the batter into a pan and spread evenly.
Bake in the preheated oven for 15–20 minutes.
Let it cool, then cut into round shapes and place on a plate.
Finish by sprinkling powdered sugar on top.