Beat the egg whites with the whisks of the hand mixer until stiff. Add sugar and vanilla sugar. Mix coconut flakes, flour and chocolate and carefully fold into the beaten egg white.
Place the dough in heaps on 2 baking trays lined with baking paper and bake one after the other in a preheated oven (electric cooker: 150 °C/ convection oven: 125 °C/ gas: level 1) for about 25 minutes. Remove the macaroons from the baking tray (they must still be soft on the inside as they will dry out during the cooling time) and let them cool on a cake rack.