Dolly Parton's Peanut Butter Pie

1 1/2 cups confectioners' sugar
1 cup crunchy peanut butter
2 graham cracker crusts
1 large container Cool Whip
8 ounces cream cheese

Beat sugar, peanut butter and cream cheese in medium bowl. Stir in Cool Whip. Pour into crusts. These pies can be frozen.