Knead flour, sugar, vanilla sugar, cloves, lemon peel, yoghurt and butter with the dough hook of the hand mixer to a smooth dough. Wrap in foil and chill for about 1 hour
Roll out the dough on a floured work surface to a thickness of approx. 3 mm, cut out approx. 50 owls using owl cutters (each 3.5 x 8.5 cm). Knead the leftovers again and again, roll out again
Arrange the owls on 2-3 baking trays lined with baking paper. Bake one after the other in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 10-12 minutes. Remove the cookies, place them on a cake rack with the baking paper and let them cool down
Beat the egg whites until stiff, add icing sugar. Divide the icing into 3 small bowls. Colour 1/3 icing pink with food colouring, 1/3 blue. Fill about 1/3 of each icing (white, pink, blue) into a piping bag. Cut off a small tip from each piping bag. Use one colour to spray a thin edge around each owl. Dilute the rest of the mixture in the bowls with 1 teaspoon of water. Pour the diluted water into a piping bag, cut off a small tip and fill the free areas with it. Leave to dry and decorate with the remaining solid icing and pearls. Allow to dry
Preparation time approx. 2 hours. waiting time approx. 1 1/2 hours