Finely grind walnuts and almonds in the universal chopper. Sift icing sugar. Beat the egg whites with the whisks of the hand mixer until stiff. Stir in icing sugar by the spoonful. To coat the stars, take off 5-6 heaped tablespoons of beaten egg white (approx. 130 g). Stir the ground nuts and almonds, vanillin sugar and cinnamon into the remaining beaten egg whites.
Roll out nut dough between 2 layers of foil (cut open freezer bags) or on a work surface dusted with icing sugar 1/2-1 cm thick. Cut out stars in different sizes and shapes and spread them on 2-3 baking trays lined with baking paper. Roll out the remaining dough again and again. To prevent the dough from sticking to the trays or foil, dust them with icing sugar. Thickly coat the stars with the icing (brush)
Decorate some stars with walnut halves, some with roughly chopped nuts and almonds and leave some white. Bake the trays one after the other in the preheated oven on the lower rack (electric oven: 150 °C/ convection oven: 125 °C/ gas: level 1) for 18-20 minutes. Let them cool down on a cake rack. Dust with icing sugar or cinnamon shortly before serving