Cover the pan with baking paper. Preheat the oven to 175 ° C. Beat the butter and peanut butter until lightly creamy, gradually stir in the eggs. Mix in the sugar thoroughly. Mix the flour and baking powder and stir in briefly.
Pour the dough into the mold and smooth it out. Sprinkle with the peanuts. Bake for 30-35 minutes. The surface should be crispy and the inside should still be soft. Let cool in the tin and cut into 12 pieces.