Preheat your oven to 325°F (160°C). In a mixing bowl, combine graham cracker crumbs, brown sugar, and melted unsalted butter until well mixed. Press this mixture firmly into the bottom and up the sides of a 9-inch pie pan, creating an even crust. Bake for 10 minutes, or until the crust is golden brown and fragrant. Allow it to cool completely before adding the filling.

In a chilled mixing bowl, pour in heavy cream and, if desired, add vanilla pudding mix for stabilization. Whisk vigorously with an electric mixer until the mixture becomes frothy. Gradually add powdered sugar while continuing to whisk until you achieve stiff peaks, around 3-5 minutes. Be careful not to over-whip. Once ready, chill the whipped cream in the refrigerator while assembling the rest of your Easy Banoffee Pie.

Once the crust is cooled, dollop the luscious dulce de leche onto the bottom, spreading it evenly with a spatula. Next, slice your ripe but firm bananas and layer them generously over the dulce de leche, ensuring even coverage. Use your chilled whipped cream to crown the pie, spreading it smoothly over the bananas to create beautiful layers. For an extra touch, sprinkle chocolate shavings or toffee bits on top if you like.

Cover the assembled Easy Banoffee Pie with plastic wrap and refrigerate for at least 1 hour. This chilling time allows the layers to set beautifully and helps the flavors meld together. When it's time to serve, you’ll have a delectably layered dessert that's as impressive as it is delicious, perfect for any occasion.