For the Crust
Place the vanilla wafers and sugar in the bowl of a food processor. Pulse to break the wafers up and then process for 1-2 minutes until the crackers are the same consistency as the sugar. Add the melted butter and pulse to combine so the crackers look just damp. Remove the mixture from the food processor and transfer to a baking sheet. Heat the oven to 375° F.
Bake the crumbles for about 10 minutes. Remove from the oven and let cool.
For the Vanilla Pudding
Bring vanilla almond milk and cream to a simmer in a medium saucepan. Meanwhile, whisk sugar, cornstarch, flour, and salt in a large mixing bowl. Add the egg yolk to the sugar mixture and whisk until smooth but very thick. While whisking constantly, gradually add the warm almond milk mixture to yolk mixture. Once the 2 mixtures are fully combined, return everything back to the saucepan and cook over medium-low heat, whisking constantly, until thick, about 2–3 minutes. Add the butter and vanilla and stir until the butter has melted.
Transfer everything to a medium bowl; press plastic wrap directly onto surface of pastry cream. Chill until set.
For the Whipped Cream
Using an electric mixer or whisk, beat heavy cream and powdered sugar until medium-stiff peaks form. Cover and chill. ** If you’re in a pinch for time, grab a tub of Cool Whip. It makes for the most gorgeous dollop EVER! **
Arrange 8 small glasses on a clean surface. Layer in the pudding, whipped cream, sliced bananas and crumbled wafer mixture. Serve with a dollop extra whipped cream.