Melt 1 cup butter or margarine over low heat. Remove from heat and stir in confectioners sugar, peanut butter and graham cracker crumbs. Spread mixture in jelly roll pan. Pat down evenly.

To make topping: Melt together 1/2 cup butter or margarine with 1 cup chocolate chips. Spread this mixture over peanut butter mixture. Refrigerate 1/2 hour. Cut into squares.

To add this recipe to your collection, drag the image to one of your lists in MacGourmet, or right click on it, download the linked file to your computer, and import the file.