Preheat the oven to 180°C (356°F).
In a bowl, mix together almond flour and baking powder.
In another bowl, combine eggs, erythritol, melted coconut oil, and vanilla extract, and mix well.
Combine the dry and wet ingredients and mix until well incorporated.
Add cocoa powder and salt, then mix again.
Pour the batter into a greased pan and spread it evenly.
Bake in the oven for 20-25 minutes.
Let it cool and cut into bite-sized pieces.