Thaw ice cream just enough to be able to stir it and put in a mixing bowl.
Crush Butterfingers into pieces (I use a ziploc and rolling pin; this is also a fun "make together" time for you and kiddies or grandkids!) Add this to ice cream and stir together. Put this mixture into graham cracker pie crust and smooth out to edges.
Place into freezer to reset the ice cream. When ready to serve, top with more crushed Butterfinger pieces if desired.