Zucchini Chocolate Cake
["1/4 c. margarine", "1/4 c. shortening", "1/2 c. vegetable oil", "1 1/2 c. sugar", "1 egg", "1 tsp. vanilla", "1/2 c. sour milk", "2 1/2 c. flour", "4 Tbsp. cocoa", "2 tsp. baking soda", "2 c. shredded zucchini", "1 (12 oz.) bag chocolate chips"]
["Cream the first 4 ingredients together with electric mixer. Add the egg, vanilla and sour milk; mix until well blended.", "Sift dry ingredients and add to mixture; mix in zucchini last.", "Spoon into greased and floured 9 x 13-inch pan.", "Sprinkle top of cake with chocolate chips.", "Bake at 325\u00b0 for 45 to 50 minutes."]
["margarine", "shortening", "vegetable oil", "sugar", "egg", "vanilla", "sour milk", "flour", "cocoa", "baking soda", "zucchini", "chocolate chips"]