Blitz the biscuits until fine, set aside.
Add butter, condensed milk & ⅓ cup Biscoff to a bowl.
Microwave in 30 sec bursts, stirring in between, for 2 mins.
Mix in the biscuit crumb until well combined.
Press into a lined tin, pop in the fridge.
Melt milk choc & Biscoff spread together.
Pour evenly over the slice.
Top with Biscoff biscuits.
Refrigerate for 4 hours or until set & slice!!
