Remove the pie plate from the freezer once the chocolate layer has set.
Evenly spread the Butterfinger cream filling mixture evenly over the chocolate layer.
Spread the remaining whipped cream over the top of the pie and garnish with the remaining crushed Butterfingers.
Allow to set in the fridge for at least an hour before enjoying. Serve chilled. Store in the fridge for up to 1 week, or freeze for 6-8 weeks.