How do You Make Snickerdoodle Cookies?

In large bowl mix 1/2 cup butter, 1 cup sugar, 1/4 tsp. cream of tartar, 1 egg, 1/2 tsp. vanilla and 1 1/2 cups flour. Roll into balls and dip into 1 1/2 tsp. cinnamon and 4 tbsp. sugar. Bake at 350 degrees for 10 minutes. Enjoy!