Mix the softened butter with sugar and vanilla sugar until frothy. Add eggs, flour and baking powder and work everything into a kneading dough. Wrap the dough in foil and let it rest in the refrigerator for about 30 minutes.
Then roll out the dough thinly on a worktop sprinkled with flour, cut out cookies and place on a baking sheet lined with baking paper. Bake in the preheated oven for 10 to 12 minutes at 180 ° C (fan oven) and after cooling, decorate with glaze and decorate as you wish.