One recipe for banana pudding cake is AllRecipe.com's Banana Pudding Poke Cake that uses prepared cake mix and pudding mix. Food Network's Banana Pudding Cake involves making the banana cake and filling from scratch.
To make AllRecipe.com's Banana Pudding Poke Cake, whisk together one box of yellow cake mix, 1 cup of water, 1/2 cup of vegetable oil and three eggs. Pour the batter into a greased and floured 9-by-13-inch pan, and bake for 23 to 28 minutes at 350 degrees Fahrenheit. Mix together 2 cups of cold milk and two packages of instant banana pudding mix until the pudding is thickened. Poke holes in the cake using a wooden spoon handle, and pour the pudding over the cake. Spread one container of Cool Whip over he cake, and top with 1 cup of vanilla wafer crumbs.
For Food Network's Banana Pudding Cake, mash 3 bananas and add 2 teaspoons of fresh lemon juice. Beat together 3/4 cup of softened butter and 2 cups of sugar, and then add three eggs, one at a time. Alternate stirring in crushed vanilla wafers and 1 cup of buttermilk, starting and ending with cookie crumbs. Stir in the mashed bananas and 2 teaspoons of vanilla extract. Pour batter into two greased and floured 9-inch pans and bake for 1 hour at 350 degrees Fahrenheit.
For the filing, mix together 1/4 cup of sugar and 1 tablespoon of flour and cornstarch, in a saucepan. Add in one egg yolk and one whole egg, as well as 1 cup of milk. Cook the mixture over medium heat for 5 to 7 minutes, and then stir in 1/4 teaspoon of vanilla.