Chocolate Zucchini Cake
["1 c. unsalted butter, softened", "1/2 c. vegetable oil", "1 3/4 c. granulated sugar", "2 large eggs", "1/2 c. buttermilk", "2 tsp. vanilla", "1/4 c. + 2 Tbsp. unsweetened cocoa powder", "2 1/2 c. all-purpose flour", "1 tsp. baking soda", "1/2 tsp. ground cloves", "1/2 tsp. cinnamon", "1/2 tsp. salt", "2 c. grated zucchini", "1 c. semi-sweet chocolate chips", "3/4 c. chopped walnuts", "8 oz. cream cheese, soft", "1 lb. powdered sugar"]
["In a bowl with an electric mixer, cream together 1 stick of butter, oil and sugar; beat in eggs, 1 at a time, beating well after each addition and beat in buttermilk and 1 teaspoon vanilla. Stir in 1/4 cup cocoa powder, flour, baking soda, cloves, cinnamon and salt until the mixture is just combined and fold in zucchini (patted dry with paper towels), chocolate chips and walnuts.", "Pour batter into 2 well buttered 9-inch round cake pans and bake in middle of preheated 350\u00b0 oven for 25 to 30 minutes or Bundt pan for 60 minutes, until tester comes out clean.", "Let cool 10 minutes and turn out onto racks and cool completely."]
["unsalted butter", "vegetable oil", "sugar", "eggs", "buttermilk", "vanilla", "+", "flour", "baking soda", "ground cloves", "cinnamon", "salt", "zucchini", "semi-sweet chocolate chips", "walnuts", "cream cheese", "powdered sugar"]