Cut the butter into pieces. Knead butter, flour, salt, egg, sugar and vanilla sugar first with the dough hooks of the hand mixer, then with your hands to a smooth dough. Wrap the dough in foil and chill for approx. 30 minutes
Roll out the dough 2-3 mm thinly on a floured work surface. Cut out circles (approx. 6 cm Ø) and spread them on 2 baking trays lined with baking paper. Knead the dough again and cut out approx. 35 circles
Bake the trays one after the other in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 8-10 minutes. Take out biscuits and let them cool down
Mix the egg whites, 2 tablespoons lemon juice and icing sugar briefly with the whisks of the hand mixer. Take 1-2 tablespoons of icing aside and stir thinly with a few drops of lemon juice. Take off 1-2 tbsp. icing and colour dark orange, at the same time possibly stirring thinner with a few drops of lemon juice. Cover the surface of the white and orange icing with foil. Colour the rest of the icing dark yellow
First spread the biscuits evenly with the yellow icing. Fill the orange icing into the piping bag, cut off a small corner and draw beak and feet. Draw the eyes with the white icing and use linseed for the pupils. Let cookies dry
waiting time approx. 2 hours