Cream the butter and sugar until light and fluffy, add vanilla. Slowly mix in flour, a cup at a time. Gently fold in crushed potato chips. Refrigerate for at least one hour.
Drop spoonfuls of dough onto cookie sheet. No need to grease baking sheet. Bake in 350 degree preheated oven for 12-15 minute or until edges are golden brown. Remove from oven and cool on wire racks.