No Bake Chocolate Peanut Butter Bars

Ingredients1 cup butter melted
2 cups graham cracker crumbs
2 cups confectioners' sugar
1 cup + 4 tablespoons peanut butter
1 1/2 cups semisweet chocolate chips

Directions
In a medium bowl, mix together the melted butter, graham cracker crumbs, confectioners' sugar, and 1 cup peanut butter until well blended. Press evenly into the bottom of an ungreased 9x13 inch pan. In a metal bowl over simmering water, or in the microwave, melt the chocolate chips with the peanut butter, stirring occasionally until smooth. Spread over the peanut butter layer. Refrigerate for at least one hour before cutting into squares.