Chocolate Zucchini Cake
["1/2 c. soft margarine", "1/2 c. vegetable oil", "1 3/4 c. sugar", "3 eggs", "1/2 tsp. cinnamon", "1/2 tsp. cloves", "1 tsp. vanilla", "1/2 c. sour milk *", "2 c. zucchini (1/4-inch diced, not shredded)", "2 1/2 c. unsifted flour", "4 Tbsp. cocoa", "1/2 tsp. baking powder", "1 tsp. baking soda", "1/4 to 1/2 c. chocolate chips"]
["Cream margarine, oil and sugar.", "Add eggs, vanilla and sour milk; beat with mixer.", "Mix all dry ingredients together and add to creamed mixture; beat with mixer.", "Stir in diced zucchini. Spoon batter into greased and floured 9 x 13 x 2-inch pan. Sprinkle top with chocolate chips.", "Bake at 325\u00b0 for 40 to 45 minutes (or until toothpick comes out clean and dry)."]
["margarine", "vegetable oil", "sugar", "eggs", "cinnamon", "cloves", "vanilla", "sour milk", "zucchini", "flour", "cocoa", "baking powder", "baking soda", "chocolate chips"]