Prepare crust
Mix crushed biscuits with melted butter. Press into a springform pan. Chill 15 minutes.
Make filling
Beat cream cheese, mascarpone, and sugar until smooth. Add eggs one at a time, then vanilla and espresso.
Bake
Pour filling over crust. Bake at 160°C (320°F) for 50–55 minutes until set but slightly jiggly in center.
Cool & chill
Let cool completely, then refrigerate at least 4 hours (overnight is best).
Add tiramisu touch
Optionally dip ladyfingers in coffee and layer on top or serve on the side.
Finish
Dust with cocoa powder and add whipped cream before serving.