Beat cream and powdered sugar in mixer to stiff peaks.
In another bowl, beat cream cheese and fluff.
Fold in half of the whipped cream and some marshmallows cut in half.
Spread into the crust.
Spread on the rest of the whipped cream and top with the rest pf the marshmallows.
Freeze 8 hours or overnight!
Let sit at room temp a half hour before serving.