Prepare the Crust: Crush graham crackers and mix with melted butter. Press into the bottom of a baking dish and bake at 350°F (175°C) for 10 minutes. Let cool.
Make the Pudding Layer: In a bowl, whisk the instant vanilla pudding mix with cold milk. Spread the pudding over the cooled crust.
Add Banana Layer: Slice bananas and layer them on top of the pudding.
Top with Whipped Cream: Spread whipped cream over the banana layer.
Chill: Refrigerate for at least 4 hours (overnight preferred) to let the bars set.
Slice and Serve: Slice into squares and enjoy!