Knead all the ingredients in a bowl to form a shortcrust pastry. Wrap the dough in cling film and place in the fridge for 2 hours (longer is even better).
Preheat oven to 175°C top/bottom heat. Roll out the dough on a lightly floured dough surface and cut out cookies of different sizes. Place on a baking tray lined with baking paper and bake for about 10-12 minutes. Allow to cool and decorate with icing and decorative sprinkles as desired.
Tip: Mix the butter flavor with a liquid component in advance so that the flavor can be well distributed throughout the dough.