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

Combine sugar, butter, oil, eggs, vanilla and cream well. Add dry ingredients and chill. Form into balls, size of a walnut and flatten with a buttered glass, bottom dipped in sugar. Bake 10 minutes at 375 degrees. I like them better when dough is not chilled.