Put the flour on the work surface and make a well in the middle. Put the powdered sugar, the egg and the aroma into the hollow (I like to use ground allspice, for example). Spread the cold butter in small pieces on the flour, then knead everything quickly to form a smooth dough. Then wrap the dough in foil and put it in the refrigerator for about 30 minutes.
Preheat the oven to 180 ° C. Roll out the dough thinly and cut out any shapes. Bake the cookies on baking sheets lined with baking paper for about 10 minutes each. Makes about 3 sheets.
After cooling, decorate with chocolate, chopped nuts or food coloring.