Crush vanilla wafers into fine crumbs, combine with melted butter, and press into the bottom of a 9-inch springform pan to form the crust.

Beat cream cheese until smooth, then add sweetened condensed milk and instant banana pudding mix. Mix until creamy.

Whip heavy cream until soft peaks form, then fold gently into the banana pudding mixture.

Spread half of the filling over the crust, layer with sliced bananas, and then top with remaining filling. Refrigerate for at least 6 hours.

Carefully remove from the springform pan, slice, and serve chilled. Optionally, garnish with extra banana slices and whipped cream.