Christmas tree made of shortbread cookies

Preparing

1. In a bowl or a mixer fitted with a paddle attachment, rub the flour with the softened butter, powdered sugar, and salt until crumbly.
2. Add the egg yolks. Mix until a smooth dough forms.
3. Slightly flatten the dough, cover with plastic wrap, and refrigerate for 30 minutes.
4. Preheat the oven to 160°C (fan-forced).
5. Line a baking sheet with parchment paper.
6. Roll out the dough using a rolling pin or a pasta machine to a thickness of 4 mm.
7. Cut circles of various sizes using nested cookie cutters.
8. Carefully place them on the baking sheet.
9. Bake for 15 minutes until lightly golden.
10. Let cool completely before handling.