Put graham crackers in a large resealable plastic bag, and crush until very fine crumbs form.
Pour crumbs into a bowl add butter, and stir until well combined.
Press the crumb mixture into a round cake springform pan. Let chill.
Put the liquid whipping cream into a large bowl and beat until stiff peaks form.
In a large bowl mix the cream cheese, mascarpone, sugar and a ground dried lemon until combined.
Pour the filling into the crust, smooth the top and refrigerate until firm, 2 1/2 to 3 hours.
Unclasp sides of pan, and remove cheesecake to serve. Refrigerate leftovers and consume within 48 hours.