Chocolate Chip Zucchini Cake
["1 3/4 c. sugar", "1/2 c. soft butter", "1/2 c. oil", "2 eggs", "1 tsp. vanilla", "1/2 c. sour milk", "2 1/2 c. flour", "4 Tbsp. cocoa", "1/2 tsp. baking powder", "1 tsp. soda", "1/2 tsp. cinnamon", "1/2 tsp. ground cloves (optional)", "2 c. chocolate chips (for top)"]
["Mix in order given.", "Sprinkle top with chocolate chips. Grease and flour a 9 x 13-inch pan.", "Bake at 350\u00b0 for 40 to 45 minutes."]
["sugar", "butter", "oil", "eggs", "vanilla", "sour milk", "flour", "cocoa", "baking powder", "soda", "cinnamon", "ground cloves", "chocolate chips"]