2Mix graham cracker crumbs, 1/3 cup sugar and melted butter until well blended . Press mixture into a 10-inch round springform pan or fluted tart pan. Bake in preheated oven for 8 minutes. Allow to cool.
3In a large bowl, beat cream cheese until light and fluffy. Stir in the peanut butter, 1/4 cup confectioners' sugar, and vanilla. In a separate bowl, whip 1 cup cream until soft peaks form. Fold the cream into the peanut butter mixture. Pour filling into pie shell and refrigerate until thoroughly chilled.
4Whip the remaining 1 cup of cream. Serve the pie with whipped cream.