1 c. brown sugar
1 c. white sugar
1 c. oil
1 c. butter
2 eggs
1 tsp. vanilla
4 1/4 c. flour
4 tsp. cream of tartar
2 tsp. baking soda
1 tsp. salt
12 oz. pkg. chocolate chips

(Get miniature chips and you will only have to use half the bag). Cream together sugars, oil, butter, 2 eggs and vanilla. Stir in all the dry ingredients. Roll into balls the size of walnuts. Put on ungreased pan. Bake at 350 degrees for 8-10 minutes.