Mix all dry ingredients in a medium bowl. Cream butter and sugar, mixing until smooth. Beat the egg in a separate bowl, adding in the vanilla and pumpkin. Add egg mixture to butter and sugar. Slowly add in dry ingredients to make a fairly stiff dough. Roll into a ball and place in the fridge or freezer for an hour or more.
Preheat oven to 350 degrees F.
Roll dough into balls about one inch in diameter; place on a baking sheet. Bake 10 minutes or until slightly browned on bottom.