In a medium saucepan, combine the whole milk, heavy cream, granulated sugar, cornstarch, vanilla extract, and salt. Stir over medium heat until thickened, about 5-7 minutes.

Continue whisking the mixture continuously to prevent lumps.

Once thickened, remove from heat and let cool for about 10 minutes.

In a baking dish or serving cups, add a layer of sliced bananas at the bottom.

Pour a layer of the cooled pudding over the bananas.

Sprinkle a layer of crushed Biscoff cookies over the pudding.

Repeat the layering process with remaining ingredients, finishing with a layer of pudding.

Cover with plastic wrap and refrigerate for at least 2 hours before serving.