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

Cream butter, oil, sugar; add eggs and vanilla. Combine dry ingredients and mix well with creamed sugar. Chill dough overnight. Roll dough into ball. Place on cookie sheet 2 inches apart.

Press cookie flat with bottom of glass dipped in sugar. To get sugar to adhere to glass, lightly grease glass by rubbing across cookie dough.

Bake at 350 degrees for 10-12 minutes or until very lightly browned on edge. Makes about 6 dozen.