Pre heat fan forced oven to 170°
Add butter and sugar to a large mixing bowl and mix with electric mixing until pale in colour (about 3 minutes).
Add vanilla and egg and mix again until well incorporated (1 minute).
Pour in flour, baking powder and salt and mix for a couple of minutes until mixture looks like bread crumbs.
Use your hands to form the mixture into a big ball of cookie dough.
Sprinkle some flour on your work surface so the dough doesn't stick, then cut dough in half so it is more manageable.
Use a rolling pin to roll out your dough to 1cm thickness.
Cut out your cookies using the cooking cutters and place on two baking trays lined with baking paper.
Bake for 12 minutes then remove from oven and allow cookies to cool completely on the baking trays.