Melt the butter or margarine with the chocolate. Beat the eggs until frothy and sprinkle with sugar. Stir in the melted butter and chocolate mixture. Mix the almonds, flour and baking powder and fold in. Grease the baking sheet and spread the batter on it. Bake in the preheated oven at 180 ° for approx. 25 minutes (top and bottom heat, use experience from your own oven!).
Melt the chocolate icing and spread it on the still warm cake. Let cool down and then enjoy.