1 c. butter, room temp.
1 c. vegetable cooking oil
1 c. granulated sugar
1 c. powdered sugar
1 tsp. vanilla
4 1/2 c. all-purpose flour
1 tsp. baking soda
1 tsp. cream of tartar

Combine butter, oil and sugars in a large mixing bowl; mix well. Add eggs, beat 1 minute until well blended. Add vanilla; beat well. In a separate bowl combine flour, baking soda, cream of tartar. Add to creamed mixture; mix well. Drop by small teaspoons on ungreased cookie sheet. Bake at 350 degrees for 8 to 10 minutes. Yield: about 5 dozen.