1/2 c. white sugar
1/4 c. brown sugar
3/4 c. butter
1 egg, beaten
2 c. flour
1 tsp. baking soda
1/2 tsp. cream of tartar
1/2 tsp. salt
1 tsp. vanilla

Mix in order given. Roll into balls. Dip in sugar, press with fork. Bake at 375 degrees 10-12 minutes.