Finely grind the oatmeal.
Melt the dark chocolate using a double boiler.
Add the eggs, milk, and honey to a bowl and mix well.
Add the ground oatmeal, cocoa powder, and baking powder, and mix evenly.
Pour the melted chocolate into the batter and mix again.
Pour the batter into a mold and bake at 180°C for 20 minutes in the oven.
Let it cool completely and cut into serving portions.