Finely chop the walnuts. Beat the egg whites with the whisks of the hand mixer until stiff. Add sugar and vanillin sugar. Mix almonds, walnuts and flour and fold in carefully. Pour the dough in heaps with a teaspoon onto 2 baking trays lined with baking paper. Bake the trays one after the other in a preheated oven (electric cooker: 150 °C/ convection oven: 125 °C/ gas: level 1) for 20-30 minutes.
Remove macaroons from the oven, place them on a cake rack and let them cool down. In the meantime, roughly chop the chocolate coating and melt it on a warm water bath. Pour the couverture into a freezer bag and cut off a small corner. Spray strips onto the macaroons and let them dry for about 1 hour. Decorate with cocktail cherries if desired