1/2 c. butter
1/2 c. oil
1 3/4 c. sugar
1 tsp. vanilla
1/2 c. sour milk
2 1/2 c. flour
4 tbsp. cocoa
1/2 tsp. baking soda
1/2 tsp. cinnamon
2 c. zucchini, diced
1/4 c. chocolate chips

Cream butter, oil, and sugar; add eggs, vanilla, and sour milk. Beat with mixer. Mix dry ingredients and add to creamed mixture. Stir in diced zucchini. Spoon batter into greased and floured 9 x 12 x 2 inch pan. Sprinkle top with chocolate chips. Bake at 325 degrees for 40 to 45 minutes, until toothpick comes out clean and dry.