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

Cream butter, oil, sugar and egg. Beat until thick and creamy. Add dry ingredients. Chill for 2 hours or overnight. Bake at 350 degrees for 8 to 10 minutes. NOTE: I put chopped pecans in mine.