Sift the flour into a bowl and make a depression in the middle. Place the egg, 100 g sugar, 1 packet of vanilla sugar and cocoa in the depression. Put butter in flakes on the rim. Work into a smooth dough with the dough hooks of the hand mixer and chill for about 30 minutes.
Roll out the dough about 3 mm thin. Cut out shooting stars (8 x 3.5 cm) and spread them on 2 baking trays lined with baking paper. Beat the egg whites until stiff, add 25 g sugar and 1 packet of vanillin sugar. Fold in ground almonds, nuts and cinnamon. Spread the mixture over the shooting stars. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 12-15 minutes. Take out and let cool down.
Dust the cookies with icing sugar. Halve the hazelnut kernels. Melt the chocolate coating over a warm water bath, fill it into a small paper piping bag and decorate the cookies with it. Decorate each shooting star with 1/2 hazelnut