Bake the Biscoff Banana Pudding Recipe: a creamy banana-Biscoff custard in a flaky tart crust, topped with whipped cream and cookie crumbs.
In a large mixing bowl, combine the all-purpose flour, baking powder, salt, and granulated sugar. Use a fork or dry whisk to blend them together until the powders are evenly distributed and there are no clumps. This creates a uniform base for the dough and ensures even rise and texture in the baked crust.
Scatter the cold unsalted butter cubes over the dry mixture and use a pastry cutter, two knives, or your fingertips to work the butter into the flour until the mixture resembles coarse crumbs with pea-sized butter bits. The little pockets of butter are what make the crust flaky and tender once baked.
Beat in the eggs and vanilla extract until the dough just comes together; it will be slightly shaggy but cohesive. Avoid overworking — stop as soon as the dough holds when pressed. Gather it into a disk shape for easy chilling.
Wrap the dough tightly in plastic wrap and chill it in the refrigerator for about 30 minutes. This firms the butter back up, relaxes the gluten, and makes the dough far easier to roll out without shrinking.
Preheat the oven to 350°F (175°C) so it is ready by the time the crust is rolled and placed in its pan. Having an accurate, steady oven temperature is key for an evenly baked, golden crust.
On a lightly floured work surface, roll the chilled dough to an even thickness and gently transfer it into a tart pan, pressing it to fit the base and sides and trimming any excess. Dock the base lightly with a fork if desired to prevent large air pockets during baking.
Bake the crust for about 20 minutes or until it takes on a warm golden color and the edges are set. Remove from the oven and allow it to cool completely on the painted surface; a fully cooled crust will keep the filling from becoming runny.
Measure the whole milk, heavy cream, sugar, cornstarch, and separate the egg yolks into a small ramekin. Have the butter, vanilla, ripe bananas (ready to mash), and crushed Biscoff cookies nearby in small bowls so you can finish the custard quickly once it thickens.
In a medium saucepan, whisk together the milk, heavy cream, granulated sugar, cornstarch, and egg yolks until smooth. Cook over medium heat, stirring constantly, until the mixture thickens into a glossy, pudding-like custard that coats the back of a spoon; this is the crucial transformation where the filling gains its creamy body.

Remove the thickened custard from heat and immediately stir in the butter and vanilla until melted and fully incorporated, then fold in the mashed bananas and crushed Biscoff cookies. The result should be a silky, pale caramel-colored banana-Biscoff custard flecked with cookie crumbs and soft banana ribbons.
Pour the warm banana-Biscoff filling into the cooled tart crust, smoothing the top with a spatula so the filling sits evenly across the surface. The contrast between the golden crust edge and the creamy filling will be obvious and inviting.
In a chilled bowl, whip the heavy cream with the powdered sugar until it reaches stiff peaks — glossy, billowy, and able to hold texture. Taste for sweetness and adjust lightly if you prefer.
Spread the whipped cream evenly over the cooled pudding, creating a soft cloud-like layer that nests and frames the banana slices. Use the back of a spoon or an offset spatula for a smooth, inviting finish.
Scatter a generous layer of crushed Biscoff cookie crumbs across the whipped cream and arrange thin banana slices in a neat overlapping row or concentric pattern if you like. The crumbs add spice and crunchy contrast to the smooth components.
Chill the assembled pudding in the refrigerator for at least 2 hours to set the filling and allow flavors to meld. When ready to serve, bring it out to slightly temper for a few minutes, then slice and enjoy.
