01 - Line a baking sheet with parchment paper. Arrange 8 Biscoff biscuits flat side up, leaving space between each for assembly.
02 - In a medium mixing bowl, gently fold the Biscoff spread into the softened vanilla ice cream using a spatula. Stop once you achieve a marbled effect—avoid over-mixing.
03 - Spoon equal portions of the Biscoff-swirled ice cream onto each of the 8 arranged biscuits. Spread evenly to the edges using the back of a spoon.
04 - Place the remaining 8 biscuits on top to complete each sandwich. Press down gently to distribute the filling evenly without squeezing it out.
05 - If desired, dip one half of each sandwich into melted chocolate, then immediately sprinkle with crushed Biscoff cookies before the chocolate sets.
06 - Transfer the assembled sandwiches to the lined baking sheet. Freeze for at least 2 hours or until the ice cream is completely firm.
07 - Remove from the freezer and serve immediately for the best texture and flavor.