01 - In a large mixing bowl, beat the heavy cream with an electric mixer until stiff peaks form, about 2-3 minutes.
02 - Gently fold the sweetened condensed milk, vanilla extract, and melted Biscoff spread into the whipped cream until smooth and uniformly combined.
03 - Transfer the mixture into a parchment-lined loaf pan, smooth the surface, and freeze for a minimum of 4 hours until completely firm.
04 - Remove the ice cream from the freezer and let it rest at room temperature for 5 minutes to soften slightly for easier scooping.
05 - Arrange 8 Biscoff cookies flat side up on a baking sheet. Scoop approximately 1/4 cup of ice cream onto each cookie, then top with a second cookie and press gently to form a sandwich.
06 - Roll the exposed edges of each sandwich in crushed Biscoff cookies if desired. Return the sandwiches to the freezer for 10-15 minutes to firm up before serving.