1In a medium bowl, stir together graham cracker crumbs, confectioners' sugar, peanut butter and melted butter. Press firmly into the bottom of a 9x13 inch pan. Melt chocolate chips over a double boiler or in the microwave, stirring occasionally. Spread melted chocolate over the crumb crust. Chill for about 5 minutes, then cut into bars before the chocolate is completely set, then chill until ready to serve.
Footnotes
Tip
Aluminum foil can be used to keep food moist, cook it evenly, and make clean-up easier.