Blitz the biscuits to a fine crumb, add in the melted butter and blitz again.
Press the biscuit down into the bottom of a 20cm/8" deep springform tin. Bake in the oven for 10 minutes.
For the Cheesecake!
Mix the cream cheese on its own until smooth.
Add in the light brown sugar, plain flour, and black treacle, one at a time, mixing each one in before adding the next.
Add in the vanilla, ginger, cinnamon and nutmeg, and mix.
Then, gradually add in the eggs one at a time. The less you mix the better!
Once mixed, fold through the soured cream, and then pour the cheesecake mix on top of the base.
Bake in the oven for 10 minutes, and then lower the temperature to 110ºc/90ºc fan, and bake for 35-45 minutes. Once baked, it should have a small wobble in the middle.
Once baked, leave to cool IN THE OVEN with the door ajar, for 2 hours.
Once cooled, leave to set in the fridge overnight.
For the Decoration!
Whip together the cream and icing sugar to medium peaks and dollop on top of the cheesecake.
Drizzle over the caramel sauce, and swirl into the cream slightly.
Sprinkle over some biscuit crumbs and serve
Notes
This cheesecake lasts for 3+ days in the fridge, once baked.
You can freeze the cheesecake for 3+ months
Feel free to adapt and change the spices to what you prefer - for example, you can use ground ginger