1. Sift the flour onto the roller, grate the butter over it, add the sugar, egg yolks, grated lemon zest and vanilla sugar.
2. Mix everything well and make a smooth dough.
3. Refrigerate the finished dough at least for 2 hours, ideally until the next day.
4. Roll out the dough into a 3 mm thick sheet and cut out any shapes using cookie cutters (ideally, make half of the cookies with a hole in the centre — use a cutter to make the hole).
5. Place the cut out cookies on the baking tray (use baking paper)
6. Bake in a preheated oven at 180 °C until golden brown (approximately 10 minutes.
7. When cookies are baked, powder the ones with having a hole with powder sugar.
8 After cooling, glue the baked pieces together with jam.