Ingredients:
- 1 box (15.25 oz) Premium Yellow Cake Mix
- 1 cup water
- 3 large eggs
- 1/2 cup unsalted butter, melted and cooled
- 1 tsp pure vanilla extract
- 2 packages (3.4 oz each) instant banana cream pudding mix
- 3 cups cold whole milk
- 1/2 can (7 oz) sweetened condensed milk
- 2 cups heavy whipping cream, cold
- 1/4 cup powdered sugar
- 1 box (11 oz) vanilla wafer cookies
- 3 large ripe bananas, sliced
Instructions:
- Prep the heat. Preheat your oven to 350°F (175°C) and grease your 9x13-inch pan thoroughly. Note: This prevents the delicate edges from sticking when you serve.
- Mix the base. In a large bowl, combine the yellow cake mix, water, 1/2 cup melted butter, 3 eggs, and vanilla. Beat on medium speed for 2 minutes until the batter is pale yellow and smooth.
- Bake the sponge. Pour the batter into the prepared pan and bake for 25 minutes until a toothpick inserted in the center comes out clean and the top is springy.
- Cool slightly. Remove the cake from the oven and let it sit for exactly 10 minutes. Note: If the cake is too hot, the holes will collapse; too cold, and the pudding won't soak in.
- Create the channels. Use the back of a wooden spoon to poke holes across the cake surface, spaced about 1 inch apart, going 3/4 of the way down.
- Whisk the infusion. In a separate bowl, whisk together 3 cups cold milk, both pudding mixes, and 1/2 can sweetened condensed milk for 2 minutes until the mixture starts to thicken but is still pourable.
- Fill the wells. Pour the pudding mixture over the warm cake, using a spatula to gently nudge the custard into every hole.
- Set the structure. Transfer the cake to the refrigerator and chill for at least 4 hours until the pudding is firm and the cake feels heavy and hydrated.
- Whip the topping. Beat 2 cups heavy cream and 1/4 cup powdered sugar in a chilled bowl until stiff peaks form that don't slouch when the whisk is lifted.
- Final Garnish. Spread the cream over the chilled cake. Top with the 3 sliced bananas and crushed vanilla wafers just before serving to keep the cookies from getting soft.