Perfect Sugar Cookies - cooking recipe

Ingredients

1 c. butter (soft)
1 c. oil
1 c. sugar
1 c. powdered sugar
2 tsp. vanilla
1 tsp. baking soda
1 tsp. cream of tartar
2 eggs
1/4 tsp. salt
4 c. flour

Preparation

Cream butter, oil, sugar and powdered sugar together; add vanilla, baking soda, cream of tartar, eggs and salt.
Mix well. Add flour, 1 cup at a time.
Chill for 4 hours.
Shape into balls, roll in sugar, then flatten.
Bake at 350\u00b0 for 10 to 13 minutes or until light brown on bottom.