1 c. powdered sugar
1 c. granulated sugar
1 c. butter
1 c. oil
2 eggs, beaten
2 tsp. vanilla
5 c. flour
1 tsp. baking soda
1 tsp. cream of tartar
1/4 tsp. salt

Cream together butter and sugars. Add remaining ingredients. Roll into small balls. Press with glass bottom dipped in sugar. Grease bottom first. Sprinkle sugar generously on top. Bake at 350 degrees for 10 to 12 minutes.