1 c. butter
1 c. powdered sugar
1 egg
1/2 tsp. vanilla
2 1/4 c. flour
1/2 tsp. baking soda
1/2 tsp. cream of tartar

Roll into 1 inch balls and flatten with a glass that's been dipped into sugar. Bake at 350 degree oven 8 to 10 minutes. Very good.