Prepare the Whipped Cream
In a chilled mixing bowl, beat the heavy cream until soft peaks form.
Add the condensed milk and continue whipping until stiff peaks form.
Assemble the Layers
Place a layer of Biscoff cookies at the bottom of a dish.
Spread a layer of whipped cream over the cookies.
Arrange a layer of sliced mangoes on top.
Repeat the layering process until all ingredients are used, finishing with a layer of cream.
Chill and Set
Cover the dish and refrigerate for at least 4 hours, preferably overnight, to allow the cookies to soften and absorb the flavors.
Serve and Enjoy
Garnish with extra mango slices or crushed cookies before serving.