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

Cream butter, oil, sugar add vanilla and eggs. Sift flour, soda, cream of tartar. Combine mixtures and chill several hours. Roll size of walnut, press with glass dipped in white sugar. Bake 10 minutes at 325-350 degrees.