115g of unsalted butter, melted
125g of graham cracker crumbs, approximately 8 full-sheet graham crackers
210g of powdered sugar
300g of natural creamy peanut butter, divided
170g of 70% cacao dark chocolate, chopped
Step 1Line an 8in x 8in (20 cm x 20cm) pan with aluminium foil or parchment paper and set it aside.
Step 2In a medium bowl, mix the melted butter, graham cracker crumbs and powdered sugar. Stir in 250g of peanut butter, then press the mixture evenly into the prepared pan.
Step 3In a small bowl, melt the remaining 50g of peanut butter with the chopped chocolate in the microwave or on the hob. Stir until smooth. Spread evenly over the peanut butter layer.
Step 4Chill the bars in the refrigerator until completely firm, at least 2 hours. Allow them to sit at room temperature for 10 minutes before cutting. Serve chilled.
Step 5Cover the leftover bars tightly and refrigerate for up to 1 week.