For the ginger cookies, beat the butter with sugar, vanilla sugar, egg, milk and the ginger until fluffy. Knead in the flour and baking powder. Wrap in plastic wrap and let rest for 30 minutes.
Roll out the dough on floured work surface to a thickness of 5-6 mm. Cut out circles 3-4 cm in diameter and place on a baking tray lined with baking paper.
Preheat the oven to 175 °C and bake the cookies for about 12 minutes. Remove from the tray and allow to cool….