1 c. butter (2 sticks)
1 1/2 c. confectioners sugar
1 egg
1 tsp. vanilla
2 1/2 c. flour
1 tsp. baking soda
1 tsp. cream of tartar
1/4 tsp. salt

Cream butter. Add sugar gradually. Cream until fluffy. Add unbeaten egg and vanilla. Beat well. Measure dry ingredients. Blend into creamed mixture, chill. Prepared cookies in variations. Bake on unbuttered cookie sheet in preheated 400 degree oven for 6 minutes or until done.