Chocolate Zucchini Cake
["1/2 c. margarine, softened", "1/2 c. oil", "1 1/3 c. sugar", "2 eggs", "1/2 c. sour milk", "2 1/2 c. flour", "1/2 tsp. baking powder", "1 tsp. baking soda", "1/2 tsp. cinnamon", "4 Tbsp. cocoa", "1 tsp. vanilla", "2 c. zucchini, grated", "1/2 c. walnuts (optional)", "chocolate chips"]
["Cream margarine, oil and sugar. Add eggs and sour milk. Mix well and then add dry ingredients and vanilla. Combine and blend well. Add zucchini and walnuts. Place in greased 9 x 13 pan. Bake 40 - 45 minutes at 350\u00b0. Sprinkle with chocolate chips."]
["margarine", "oil", "sugar", "eggs", "sour milk", "flour", "baking powder", "baking soda", "cinnamon", "cocoa", "vanilla", "zucchini", "walnuts", "chocolate chips"]