A snippet from bottomlesskitchen.com: "Very quick & easy (especially if you have a microwave...) recipe, as there is no baking or cooking involved with this dessert. A little mixing and patiently waiting for the squares to harden is all you need!"
15.0 bars, but it depends on how you cut them
Mix together the butter, graham cracker crumbs, sugar, and first cup of the peanut butter until well blended.
Press evenly into an ungreased 9x13 pan. (We used a pyrex.)
Melt the chocolate chips in the microwave. (Or, if you are like us and do not have a microwave...create a double boiler of sorts by placing a metal bowl over simmering water on the stove to melt the chips.)
Spread chocolate evenly over peanut butter filling.
Refrigerate for at least one hour. (Until chocolate crust hardens throughout.)