Preheat oven to 350F degrees (180C). Prepare a parchment lined baking sheet.
In a large bowl, cream butter and sugar together until they are light and fluffy
Stir in vanilla. Add flour 1 cup at a time, stirring to incorporate before adding the next cup.
Refrigerate dough for at least one hour to overnight. Then roll out dough on well floured surface, making sure not to roll too thin, no less than 1/4", and cut into preferred shapes.
Bake for 10-12 minutes or until slightly golden.
Feel free to make them plain, dip in chocolate, coconut, nuts, or make with a thumbprint filled with jam!