Line an 8-inch square baking pan with parchment paper and set aside.

Stir half of the chopped Biscoff cookies into the fudge mixture. Spoon the mixture into the prepared baking pan and smooth the surface with a rubber spatula. Top the fudge with the remaining chopped Biscoff cookies and press down gently so the cookies stick in the fudge.

Keep this fudge fresh and tasting its best by storing it in an airtight container in the fridge. It can then be enjoyed for up to 1 week.