01 -
Preheat oven to 175°C. Generously grease a 23x33 cm baking dish with nonstick cooking spray.
02 -
In a large mixing bowl, whisk instant banana pudding mix with cold milk until fully dissolved and thickened.
03 -
Add yellow cake mix to the pudding mixture and stir well until a smooth batter forms.
04 -
Gently fold in the sliced bananas using a silicone spatula.
05 -
Pour the batter evenly into the prepared baking dish and sprinkle chopped vanilla wafer cookies across the surface.
06 -
Transfer dish to the oven and bake for 30 to 35 minutes, or until a toothpick inserted into the center comes out clean.
07 -
Allow to cool completely before slicing into squares and serving.