Grease a cake tin (approx. 2 litres capacity) well and sprinkle with hazelnut leaves. Cut the nougat into small cubes and chop the chocolate roughly. Mix flour, baking powder, nuts and almonds.
Separate the eggs and beat the egg white until stiff. Beat the fat, sugar and salt with the whisk of the hand mixer until foamy. Stir in the egg yolks one after the other. Add the flour mixture in portions, alternating with the milk.
Fold the chocolate, nougat and beaten egg white into the dough. Fill the dough into the tin and bake in the preheated oven (electric: 175 °C/ gas: level 2) for approx. 70 minutes. Allow to cool briefly on a cake rack, then turn out.
Dust the cake with icing sugar and decorate as desired with hazelnut flakes. Makes about 16 pieces.