Instructions

• Line an 8x8 or 9x9 pan with parchment paper, leaving excess on two opposite sides to act as handles for easy removal.
• In a large bowl, combine 1 cup melted and slightly cooled unsalted butter and 1 1/2 cups creamy peanut butter. Stir or beat until smooth and uniform.
• Add 1 1/2 cups powdered sugar to the butter–peanut butter mixture and mix until incorporated. Add 2 cups graham cracker crumbs and stir until the mixture is evenly combined and holds together.
• Transfer the mixture to the prepared pan. Press it firmly and evenly into the bottom of the pan with the back of a spatula or your hands, then smooth the top.
• Place 1 1/2 cups chopped chocolate and 1/4 cup creamy peanut butter in a microwave-safe bowl. Microwave in 20–30 second intervals, stirring well between each interval, until the chocolate and peanut butter are completely melted and the mixture is smooth. (Alternatively, melt together in a double boiler, stirring until smooth.)
• Pour the melted chocolate–peanut butter mixture over the pressed base and spread evenly with a spatula. Sprinkle 1/4 cup chopped roasted peanuts over the top.
• Chill the bars in the refrigerator for at least 2 hours, or until firm. Use the parchment handles to lift the slab from the pan and cut into bars before serving.