Melt dark chocolate and coconut oil using a double boiler.
Beat the eggs and mix with stevia.
Sift in almond flour, baking powder, and cocoa powder, then mix well.
Add the melted chocolate mixture to the batter and combine.
Line the pan with parchment paper and pour in the batter.
Bake in a preheated oven at 180°C for 20 minutes.