Mix together the cookie crumbs and melted butter and press down in a lightly buttered 7.5 - 8 inch (19 -20 cm) springform pan, place in the refrigerator for 20 minutes.
Meanwhile in a large bowl beat together the cream cheese and mascarpone until light and fluffy, add the sugar and vanilla beat to combine.
Beat the cold whipping / whole cream until soft peaks appear, then add the cream cheese mixture and beat just until combined.
In a small pot mix the gelatine and 1/4 cup (55 grams) of whipping cream, let sit for 5 minutes. Then heat and stir just until the gelatine dissolves, do not boil. Add a tablespoon of the tiramisu filling and stir to combine. Then add to the bowl of tiramisu filling, beat just to combine.
Remove the base from the fridge, spread 1/3 of the tiramisu filling over the crumbs and top with the lady fingers soaked in coffee*, top with another third of the filling, make a decorative topping on top with the remaining filling. Refrigerate for 12 hours or over night, sprinkle with unsweetened cocoa before serving**. Enjoy!
*place the coffee in a plate and roll the lady fingers in the coffee (turning once on each side, break the cookies to fit.
**Run a knife around the edge of the pan before removing.