Coarsely chop the peanuts
Melt the dark chocolate using a double boiler
Combine eggs and erythritol in a bowl and mix
Add almond flour and baking powder, then mix well
Add the melted chocolate and chopped peanuts to the dough and combine
Divide the dough into the pan and smooth it out
Bake for 20 minutes in a preheated oven at 180°C