Chocolate Zucchini Cake
["1/2 c. butter", "1/2 c. salad oil", "1 3/4 c. sugar", "2 eggs", "1 tsp. vanilla", "1/2 c. sour milk", "4 Tbsp. cocoa", "2 1/2 c. flour", "1/2 tsp. baking powder", "1 tsp. soda", "1 tsp. salt", "2 c. grated zucchini (leave the skin on)", "1 c. nuts", "16 oz. chocolate chips"]
["Cream butter, oil and sugar.", "Add eggs, vanilla and sour milk. Sift cocoa, flour, baking powder, soda and salt.", "Add to eggs mixture.", "Add zucchini.", "Pour into 9 x 13-inch pan.", "Top with nuts and chocolate chips.", "Bake at 325\u00b0 for 45 minutes."]
["butter", "salad oil", "sugar", "eggs", "vanilla", "sour milk", "cocoa", "flour", "baking powder", "soda", "salt", "zucchini", "nuts", "chocolate chips"]