Mix the butter with the hand mixer or in the food processor until smooth, add sugar, vanilla sugar and flavoring and stir until a thickened mass is formed. Then stir in the egg for 1/2 minute at the highest level. Then stir in the flour, baking powder and peanuts.
Using two teaspoons, place walnut-sized dough on a baking sheet lined with baking paper. Place 1 peanut on each pile if you like. Put the baking sheet on the middle shelf in the oven preheated to 180 ° C (hot air: 160 ° C) and bake the biscuits for about 10 minutes.