||In 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 occassionaly.
Spread melted chocolate over the crumb crust.
Chill for at about 5 minutes and then cut into bars before chocolate is completely set. Then chill until ready to serve.