1/4 c. butter
1/4 c. shortening
1/2 c. vegetable oil
1 1/2 c. sugar
1 egg
1 tsp. vanilla
1/2 c. sour milk (add 1 tbsp. vinegar or lemon juice to milk and let stand a few minutes.)
2 1/2 c. flour
4 tbsp. cocoa
2 tsp. baking soda
2 c. shredded zucchini
12 oz. chocolate chips

Cream first 4 ingredients together in an electric mixer. Add egg, vanilla and sour milk. Mix well. Sift dry ingredients and add. Mix in zucchini last. Spoon into greased and floured 9 x 13 inch pan and sprinkle with chocolate chips. Bake at 325 degrees for 45 to 50 minutes. Serve as is or add favorite frosting.