Using a food processor, blitz all of the biscuits to a fine crumb and mix in the melted butter. Or, crush the biscuits in a bowl and then add the melted butter
Press this into the sides and base of a 23cm tart tin
Refrigerate for now.
Filling
Melt your biscoff spread for about 20-30 seconds in the microwave, or in a pan till slightly smoother and more runny
Spread the biscoff spread onto the biscuit base. Set in the fridge whilst you make the ganache
Ganache
In a heatproof pan, add your double cream and heat until just boiling.
In a separate bowl, add your chocolate (chopped up), butter and biscoff spread and pour on the hot cream. Whisk together until smooth
Alternatively, add the ingredients to a bowl and heat in the microwave until melted
Pour the chocolate mixture onto the biscoff spread and refrigerate for an hour or two until set firm.
Decoration
Drizzle on some melted biscoff spread
I crushed some biscuit crumbs, and added on some whole biscoff biscuits too