Homemade cookies: how to make a perfect shortcrust pastry

Ingredients:
For the butter crust:
250 g all-purpose flour
100 g icing sugar
100 g cold butter1 egg + 1 yolk
1 baking powder
1 teaspoon
1 vanillin
For the chocolate coating:
100 g of melted dark chocolate

Addresses:
1. In a bowl, mix the flour with the butter.
2. Then add sugar, baking powder, salt and vanillin.
3. Finally add the eggs and form a homogeneous bar.
4. Refrigerate for one hour.
5. Then stretch the dough, shape the cookies and bake at 180° for 10 minutes.
6. Glaze with chocolate and decorate as desired.