Chocolate Peanut Butter Wacky Cake 1 Reviews By Anonymous recipe Comments | 0 Favorites | 33 Print Chocolate cake with peanut butter icing. This recipe has been a favorite for birthdays in my family for years. The cake is very moist. Chocolate Peanut Butter Wacky Cake Ingredients 3 cups all-purpose flour2 teaspoons baking soda1 teaspoon salt6 tablespoons unsweetened cocoa powder2 cups white sugar10 tablespoons butter, melted2 teaspoons distilled white vinegar2 cups warm water1/4 cup peanut butter1 cup packed brown sugar1/4 cup milk1/4 cup butter, softened Instructions 1 In a large bowl, sift together the flour, baking soda, salt, cocoa, and white sugar. 2 To the sifted ingredients, add the 10 tablespoons butter or margarine, vinegar, and warm water. Mix thoroughly, but do not beat. Pour batter into ungreased 9 x 13 inch pan. 3 Bake at 350 degrees F (175 degrees C)for 30 to 35 minutes. Remove cake from oven, but keep it in the pan. 4 Cream together peanut butter, brown sugar, milk, and 1/4 cup butter or margarine. Spread icing onto cake. Place under broiler until brown and bubbly.