13x9 Chocolate Cake Recipe. Grease and flour 13x9x2-inch baking pan. Microwave chocolate butter and water in large microwaveable bowl on HIGH 1-12 to 2 min.
Add vanilla mayonnaise and water. Preheat oven to 350 degrees 175 degrees C. No layers to assemble.
Baked in a 9 x 13 pan.
Spray one 13x9 inch cake pan with cooking oil spray. Baked in a 9 x 13 pan. Theres a wide world of chocolate cake recipes but youre missing out if you dont give this one a try. Heat oven to 350 F.