01 -
Mix the yellow cake mix with water, oil, and eggs according to package directions. Pour into a greased 9x13-inch dish and bake as directed on the box. Let the cake cool completely.
02 -
Using the handle of a wooden spoon or a similar utensil, create holes across the surface of the cooled cake.
03 -
In a mixing bowl, whisk together the vanilla instant pudding mix, banana cream instant pudding mix, and cold milk until they begin to thicken.
04 -
Pour the prepared pudding mixture evenly over the cake, spreading it with a spatula to fill the holes. Refrigerate for 1 hour.
05 -
Spread the thawed Cool Whip over the pudding layer. Sprinkle crushed vanilla wafers generously over the top. Garnish with freshly sliced bananas before serving.