Making Creamy Banana Pudding is a breeze if you follow these simple steps:

1. Prepare the Pudding Base: In a medium saucepan, combine whole milk, granulated sugar, cornstarch, and salt. Whisk until smooth.
2. Heat Mixture: Place the saucepan over medium heat. Continuously whisk the mixture until it begins to thicken and bubble, about 5-8 minutes.
3. Temper the Egg Yolks: In a separate bowl, beat the egg yolks. Gradually add a small amount of the hot milk mixture to the yolks, whisking constantly to temper them.
4. Combine Mixtures: Pour the tempered yolk mixture back into the saucepan with the remaining milk mixture. Whisk to combine, and continue to cook for an additional 2-3 minutes until thickened.
5. Finish the Pudding: Remove the saucepan from heat, and stir in the unsalted butter and vanilla extract until fully incorporated.
6. Layer the Dessert: In a large bowl or trifle dish, layer half of the vanilla wafers, half of the banana slices, and half of the pudding mixture. Repeat the layers with the remaining ingredients.
7. Chill: Cover the dish with plastic wrap and refrigerate for at least 2 hours to allow the flavors to meld and the pudding to set.
8. Serve: Just before serving, top with whipped cream and additional banana slices, if desired.

By following these steps, you will create a luscious and creamy banana pudding that everyone will love!