Preheat the oven to 160 degrees Celsius. Place the biscuits into a food processor and process until it resembles fine breadcrumbs
Mix in the melted butter
Line a 22cm springform pan, bottom and sides of the pan, with parchment paper
Press the biscuits into the base using the back of a measuring cup, swril the cup around a little to get some of the biscuit to the side of the pan. Ensure that the biscuit crumbs are pressed firmly into the pan
You can refrigerate whilst you make the filling
In a large bowl beat the cream cheese until smooth, add the castor sugar and beat until it's well incorporated. Mix in the mascarpone together with the vanilla paste. Beat in the eggs, one at a time, just a few seconds each. Mix in the condensed milk and flour. Do not over mix
Pour the filling into the biscuit base and bake at 160 degrees Celsius in a water bath for 45 minutes or until cooked. The center will be slightly jiggly and the cheesecake will be a little brown. Remove the cheesecake from the water bath and leave it to cool in the oven with the door slightly ajar. You can place a wooden spoon to keep the oven door open.
Refrigerate for 4 hours. Loosen the pan and gently remove the cake off the base using the overhanging paper. Slide cheesecake off the paper
Drizzle some caramel over or decorate as desired