1 c. butter
1 1/2 c. sugar
3 eggs, beaten well
1 tsp. vanilla
3 1/2 c. flour
2 tsp. cream of tartar
1 tsp. baking soda
1/2 tsp. salt

Cream butter and sugar. Add eggs and vanilla. Mix well. Add remaining ingredients. Mix and chill. Bake at 350 degrees for 10 minutes.