2Cover the lined tray with a single layer of Biscoff biscuits.
3In a medium-sized saucepan, place butter and sugar. Cook on medium heat until completely melted and the mixture begins to bubble.
4Carefully pour the butter and sugar mixture over your biscuit base and place in a preheated oven for approximately 5 minutes or until the mixture begins bubbling again.
5Remove from the oven and carefully place chocolate onto the caramel mixture.
6Wait 5 minutes and then gently spread the chocolate into an even layer.
7Drizzle melted Biscoff spread over the chocolate layer.
8Sprinkle crumbled Biscoff biscuits on top.
9Allow to cool completely in the fridge for approximately 2 hours before slicing and serving.