In a medium saucepan, whisk together the sugar, flour, and salt.

Gradually whisk in the milk and beaten eggs until fully incorporated.

Heat the saucepan over medium heat, stirring constantly until the mixture thickens and bubbles, about 5 minutes.

Once thickened, remove the saucepan from heat and stir in the vanilla extract.

In a 9x13 inch baking dish, layer half of the vanilla wafers, followed by half of the banana slices.

Spread half of the pudding mixture over the layered wafers and bananas.

Repeat the layering process with the remaining wafers, bananas, and pudding.

Finally, spread the whipped cream over the top layer of pudding.