Banana Pudding Cake
["1/2 c. mashed banana", "1 yellow cake mix", "1 box instant vanilla pudding", "4 eggs", "1 c. water", "1/4 c. oil"]
["Combine all ingredients in a large bowl; blend until moistened.", "Pour into a greased 9 x 13-inch pan.", "Bake at 350\u00b0 for 50 to 55 minutes.", "Cool and sprinkle with powdered sugar, if desired."]
["mashed banana", "yellow cake", "vanilla pudding", "eggs", "water", "oil"]