Zucchini Chocolate Cake
["1/2 c. soft butter", "1/2 c. vegetable oil", "1 3/4 c. sugar", "2 eggs", "1 tsp. vanilla", "1/2 c. sour cream", "2 c. chopped zucchini", "2 1/2 c. flour", "4 Tbsp. cocoa", "1/2 tsp. cinnamon", "1/2 tsp. nutmeg", "1/2 tsp. baking powder", "1 tsp. soda", "1 stick butter", "6 Tbsp. milk", "2 Tbsp. cocoa", "1 box powdered sugar", "1 tsp. vanilla", "1 c. chopped nuts"]
["Beat together and frost cake when finished baking."]
["butter", "vegetable oil", "sugar", "eggs", "vanilla", "sour cream", "zucchini", "flour", "cocoa", "cinnamon", "nutmeg", "baking powder", "soda", "butter", "milk", "cocoa", "powdered sugar", "vanilla", "nuts"]