In a large bowl, whisk together the instant pudding mix and cold milk for about 2 minutes until thickened.
Gently fold in the whipped topping until fully combined and creamy.
Layer banana slices evenly over the bottom of the graham cracker crust.
Spoon the pudding mixture over the bananas and spread evenly.
Top with extra banana slices or vanilla wafers if you’re feeling fancy.
Chill in the refrigerator for at least 2 hours before serving.