Preheat the oven to 180°C (356°F).
Mix almond flour, cocoa powder, and baking powder together in a bowl.
In another bowl, combine eggs, erythritol, and coconut oil and mix well.
Combine the two mixtures and mix thoroughly.
Pour the batter into a pan and spread it evenly.
Bake in the preheated oven for 20 minutes.
Let it cool, then cut into bite-sized pieces.