1/2 c. powdered sugar
1/2 c. granulated sugar
1/2 c. vegetable oil
1/2 c. butter
1 egg
1/2 tsp. vanilla
2 c. + 2 tbsp. flour
1/2 tsp. salt
1/2 tsp. baking soda
1/2 tsp. cream of tartar

Cream together butter, sugar and oil; then add egg and vanilla. Stir well. Sift all dry ingredients together and add to creamed mixture. Form small amount into balls and press down with small glass that has first been pressed in sugar. Bake at 375 degrees for 10 minutes.