Chocolate Peanut Butter Icebox Pie

I adjusted this recipe from a chocolate peanut-butter icebox cake from Martha Stewart's Everyday Food magazine...

Chocolate Peanut-butter icebox pie

1 chocolate graham cracker crust (store bought or homemade)

2 cups heavy cream, well chilled

1/3 cup confectioners' sugar

1/3 cup smooth peanut butter

chocolate wafter cookies or chocolate chips for garnish

In a large bowl, whip 1 1/2 cups cream with sugar until soft peaks form. In a small bowl, whisk peanut butter and remaining cream until blended. Fold peanut butter mixture into whipped cream. Pour mixture into graham cracker shell and garnish with wafer cookies or chocolate chips. Place pie in freezer until set. Store in freezer or refrigerator (if you store it in the freezer, set it out 10 minutes before serving).