Chop the nuts coarsely and fry in a frying pan. Melt the chocolate with butter.
Beat the eggs with sugar. Mix the flour with cocoa and baking powder.
Mix the egg mixture with flour, gradually pour in the cooled melted chocolate and nuts.
Cover the baking sheet with paper, grease with oil and lay out the dough (preferably a 20 * 20 cm shape).
Bake in the oven (180 degrees) for 35-40 minutes, check the readiness with a stick. I smeared the finished cake with a little melted chocolate and sprinkled with nuts. Cut into 20 pieces and enjoy, yummy!