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

Mix and roll in small balls. Dip in sugar and flatten with fork or cup. Bake at 350 degrees about 15 minutes.