1 c. unsalted butter (room temperature)
1 c. vegetable oil
1 c. sugar
1 c. powdered sugar
2 eggs
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 large bowl. Mix well. Add eggs; beat 1 minute, until well blended. Add vanilla; beat well. In separate bowl, combine flour, soda and cream of tartar. Add to creamed mixture. Drop by small spoonfuls onto ungreased cookie sheet.

Bake at 375°F for 8 to 10 minutes.

Makes approximately 5 dozen.