For the chocolate nut cake, cream butter, sugar and eggs. Mix the flour with the baking powder, sift onto the foam mixture and stir in.
Stir in the ground and chopped nuts as well. Pour the batter into a buttered loaf pan and bake the cake at 180 °C for about 1 hour (test with a stick).
Let the cake cool on a cooling rack. Chop the chocolate coating, melt in a bain-marie and coat the cake with it.