In a mixing bowl, blend cream cheese, sugar, and cookie butter until smooth.
In a separate bowl, whip 1 1/2 cups of heavy cream until soft peaks form.
Gently fold the whipped cream into the biscoff mixture.
Set the filling in the fridge while you work on the crust.
Keep the remaining 1/2 cup of whipped cream in the fridge or freezer for 6 hours; it will be used for the frosting.