1 c. oil
1 c. shortening
1 c. sugar
1 c. brown sugar
2 eggs
12 oz. chocolate chips
4-5 c. flour
4 tsp. cream of tartar
2 tsp. baking soda
2 tsp. vanilla

Cream sugar, shortening, oil and vanilla until fluffy. Add eggs, dry ingredients and chocolate chips. Bake at 350 degrees for 10-12 minutes.