2 sticks butter
2 c. white sugar
1 c. oil
1 egg
1 tbsp. milk
1 tsp. salt
1 tsp. vanilla
1 tsp. baking soda
1 tsp. cream of tartar
4 c. flour
12 oz. chocolate chips

Beat first 3 ingredients together until light. Add next 7 ingredients. Stir in chocolate chips. Drop on cookie sheet.

Bake for 12 to 15 minutes at 350°F.