Mix the butter, sugar and vanilla until smooth.

Add the flour, egg and egg yolk and process until the mixture form a soft dough.

Take the dough out and knead slightly bringing it together in ball and wrap it in cling film and put in the fridge for 20minute to cool a bit.

Bring out from the fridge and roll out on a board with any shape of your choice.

Place the cookies in a baking tray and bake for 15-20 minutes or to your desire colour. Bring out to cool and walla your cookies is good to go.