Depends how you cut
graham cracker crumbs, finely ground in food proccessor
semi sweet chocolate chips
1In a medium bowl, mix together the melted butter, graham cracker crumbs, confectioners’ sugar, and 1 cup peanut butter until well blended.
2Press evenly into the bottom of an ungreased 9×13 inch pan.
3In a metal bowl over simmering water, or in the microwave, melt the chocolate chips with the peanut butter, stirring occasionally until smooth.
4Spread over the peanut butter layer
5Refrigerate for at least one hour before cutting into squares.