Line the base and sides of the tin with baking paper / baking parchment.
Melt the butter in the microwave or in a small saucepan over a medium heat.
Crush the Biscoff biscuits to fine crumbs - either in a food processor or by hand. See note 1. below for my preferred way by hand.
Pour the melted butter in to the crushed biscuits and mix thoroughly to coat all the crumbs in butter.
Tip into the prepared tin and press down with the back of a spoon pushing it to all edges of the tin and smoothing the top down.
Place in the fridge for 30 minutes to set.
After the cheesecake base has been in the fridge for half an hour, make the cheesecake topping.
Pour the cream in to a medium sized bowl and using a hand mixer whisk the cream to soft peaks.
Tip the cream cheese in to another mixing bowl and add the vanilla and icing sugar / confectioners sugar.
Beat with a spoon until well combined, or use a hand mixer (it doesn’t matter if it has cream on the whisk.)
Fold the whipped cream in to the cream cheese mixture.
Take a half of the cream cheese / cream mixture and spoon on to the cheesecake base.
Dot half of the Biscoff spread over the mixture and swirl with a blunt knife to create a marble pattern.
Top with the rest of the cheesecake mixture and then dot spoonfuls of the rest of the Biscoff spread on top and drag a knife through the spread to create a marble pattern.
Place in the fridge for at least 4 hours - ideally 6-8 hours or overnight to set.
To serve, remove from the tin and decorate with fresh or frozen berries and extra Lotus Biscoff crumbs.
Serve straight away once decorated.
The cheesecake will keep, covered, in the fridge for up to 3 days but is best eaten 24 hours after it is made. It is still edible - and delicious - after that time but the base becomes a little softer and it's not quite as impressive.