Mix butter, vanilla pulp and icing sugar with the whisk of the hand mixer until creamy. Stir in the egg. Stir in flour. Pour the dough into a piping bag with a star-shaped spout and squirt 10 biscuits each onto 2 baking trays lined with baking paper. Refrigerate for about 1 hour.
Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 8-10 minutes, one sheet at a time. Remove the cookies and let them cool down on a cake rack. Dust the cookies with icing sugar
Waiting time approx. 1 hour