Combine the sugar, cornstarch and salt in a small saucepan. Add milk. Stir over medium heat until thickened. Cook one minute and remove from heat.

Beat the eggs in a small bowl. Add about a half cup of the milk mixture to the eggs stirring constantly. Add the egg mixture to the saucepan. Stir constantly until thickened. Cook one more minute. Remove from heat. Add butter and vanilla. Cover with plastic wrap to prevent skin that will form if you don't. Cool.

To assemble banana puddings. Whip the cream until thick and creamy with the confectioners sugar and vanilla. Set aside.

Crush the biscoff cookies. Add the melted butter.

Put a couple of tablespoons in the bottom of the containers you are using. Top with some of the pudding. Add a few sliced bananas. Add a little of the whipped cream. Add another pudding layer, bananas and top with whipped cream. Add a few sprinkles of the Biscoff sprinkles and a sliced banana on top just before serving.