Ingredients

  • 1 (18.25 ounce) box yellow cake mix (such as Duncan Hines(R))
  • 1 cup water
  • 1/2 cup vegetable oil
  • 3 eggs
  • 2 cups cold milk
  • 2 (3.5 ounce) packages instant banana pudding mix
  • 1 (8 ounce) container frozen whipped topping (such as Cool Whip(R)), thawed
  • 1 cup vanilla wafer crumbs (such as Nilla(R)), or to taste

Method

  • Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9x13-inch baking dish.
  • Whisk cake mix, water, vegetable oil, and eggs together in a bowl until smooth; pour into the prepared baking dish.
  • Bake in the preheated oven until a toothpick inserted in the center of the cake comes out clean, 23 to 28 minutes.
  • Whisk cold milk and pudding mix together in a bowl until pudding is soft and thickened, about 2 minutes.
  • Poke holes into the cake using the handle of a clean wooden spoon. Pour pudding over cake, spreading evenly. Spread whipped topping over pudding layer and sprinkle vanilla wafers over whipped topping.