Mix the ingredients for the crust in a small bowl and press into a 9-inch pie plate. Place in freezer while you prepare the filling.
With an electric mixer, beat cream cheese and sugar until smooth. Set aside.
In a separate bowl, beat heavy cream and corn syrup with an electric mixer until stiff peaks form. Fold whipped cream into cream cheese mixture until smooth.
Reserve 1/2 cup of crushed Butterfinger. Fold remaining Butterfinger into whipped cream and cream cheese mixture. Spread filling into prepared crust. Top with remaining crushed Butterfinger.