In a mixing bowl, combine the vanilla pudding mix and 2 cups of whole milk. Whisk vigorously for about 2-3 minutes, or until the mixture thickens and becomes smooth.

While the pudding sets, take about a cup of Biscoff cookies and place them in a zip-top bag. Use a rolling pin or a heavy object to gently crush the cookies into coarse crumbs.

Slice 2-3 ripe bananas into thin rounds and set them nearby for easy access while layering.

In a large serving dish, start with a generous layer of crushed Biscoff cookies at the bottom, followed by a layer of prepared vanilla pudding, and then a layer of sliced bananas.

Continue layering by adding more crushed Biscoff cookies, vanilla pudding, and banana slices until ingredients are used up, finishing with pudding on top.

Cover the pudding with plastic wrap and refrigerate for at least 2 hours.

Once chilled, sprinkle reserved Biscoff cookie crumbs over the top and serve chilled.