Cream together the softened butter and sugar. Once it's combined and creamy, add in the egg and fully incorporate it before adding in the vanilla.
Mix together the dry ingredients, then add them to the butter and sugar mixture.
Put in the fridge to chill for about 20 minutes while you preheat the oven to 350 degrees.
Dust your work surface with a little flour and roll the dough out to about 1/4" thick, and use cookie cutters to cut out your shapes.
On a parchment lined baking sheet bake for 8-10 minutes or until the edges are slightly brown. Remove them from the oven to cook, and they will settle and firm up a bit. Allow to cool completely before decorating. Enjoy!