1. Bake the Cake Layers:
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Preheat your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.
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In a large bowl, use a hand mixer to cream together the softened butter and granulated sugar until light and fluffy.
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Beat in the eggs and egg whites, one at a time, followed by the vanilla extract.
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In a separate bowl, whisk together the flour, banana pudding mix, and baking powder.
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Gradually add the dry ingredients to the wet ingredients, alternating with the 1 cup of milk, and mix until just combined and the batter is smooth.
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Divide the batter evenly between the prepared pans. Bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
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Let the cakes cool in the pans for 10 minutes before turning them out onto a wire rack to cool completely.
2. Prepare the Filling:
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Gently fold in the 1 cup of Cool Whip until fully incorporated. Refrigerate the filling for at least 15 minutes to set.
3. Assemble the Cake:
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Once the cake layers are completely cool, place one layer on your serving plate. If desired, level the top for an even surface.
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Spread the chilled vanilla pudding filling evenly over the first cake layer.
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Arrange a single layer of sliced bananas on top of the filling.
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Carefully place the second cake layer on top.
4. Add the Toppings:
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Garnish the top with vanilla wafers and piped whipped cream.
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Just before serving, drizzle the entire cake with the sweetened condensed milk for a final touch of sweetness.
Enjoy your delicious homemade Banana Pudding Cake! For best results, store it in the refrigerator.