1 cup butter or margarine
1 cup white sugar
1 cup vegetable oil
1 cup powdered sugar
2 eggs
1 tsp vanilla extract
4 1/2 cups all purpose flour
1 tsp baking soda
1 tsp cream of tartar
1 tsp salt
Cream together butter and white sugar. Beat in the oil and powdered sugar until nice and smooth. Add in the eggs and vanilla extract, beating well. Combine flour, soda, cream of tartar and salt in another bowl and then stir into mix. Drop dough by teaspoonfuls onto ungreased cookie sheets. Flatten each cookie to about 1/4 inch thickness using a bottom of a glass dipped in sugar. Bake at 350 degrees F for 8-10 minutes or until just lightly browned around the edges.