Prepare a 9x13 pan by misting with cooking spray, butter, or lining with parchment.
Add the butter and 1 cup of peanut butter into a microwave safe bowl. Heat for one minute, stir, and heat and additional 30 seconds or until fully melted.
Stir in the graham cracker crumbs and powdered sugar. Transfer to your prepared dish and gently press down until even.
Chill the crust for 15 minutes.
Combine the chocolate chips and 1/4 cup peanut butter in a microwave safe bowl. Heat until melted, being sure to stir at every 15-30 second interval.
Pour the melted chocolate over the prepared crust. Use a spatula or spoon to spread over your bars.
Allow the chocolate to firm, cut, and enjoy!
Notes
Try substituting Ritz crackers for the grahams for an entirely new flavor.