Beat the butter with the powdered sugar and add the egg yolks one at a time while stirring. Add the cocoa, mix and set aside half of this mixture for the cream. To the other half, add the ground walnuts and then gently stir in the beaten to snow egg whites.
Pour the mixture into a greased and floured tray and bake in a moderate oven for about 30 minutes. Remove the cake, leave it to cool and divide it into several layers - you decide how many.
Bind the layers together with the cream, coat the cake with it and decorate with grated chocolate and chopped almonds.