1/2 c. butter
1/2 c. oil
1 3/4 c. sugar
2 eggs
1 tsp. vanilla
1/2 c. sour milk
2 1/2 c. flour
4 tbsp. cocoa
1 1/2 tsp. baking soda
1/2 tsp. cinnamon
2 c. shredded zucchini
1 (12 oz.) bag chocolate chips

To make 1/2 cup sour milk, add 1 1/2 teaspoons vinegar or lemon juice to milk.

Cream butter, oil, sugar, eggs, vanilla and milk and beat well. Add remaining ingredients except zucchini and chocolate chips. Mix well. Add zucchini and 1/2 chocolate chips. Spread in pan. Sprinkle remaining chips over batter and bake at 350 degrees in 12"x13" pan.