Step 1

Line an 8×8 or 9×9 inch square baking pan with aluminum foil or parchment paper. Set aside.

Step 2

Mix the melted butter, graham cracker crumbs, and confectioners’ sugar together in a medium bowl. Stir in 1 cup (250g) of peanut butter, then press evenly into prepared baking pan.

Step 3

Melt remaining 2 Tablespoons of peanut butter with the chocolate chips in the microwave or on the stove. Stir until smooth. Spread over peanut butter layer.

Step 4

Chill in the refrigerator until completely firm, at least 2 hours. Allow to sit at room temperature for 10 minutes before cutting. Serve chilled. Setting them out for a few hours at room temperature for serving is OK.

Step 5

Cover leftover bars tightly and refrigerate for up to 1 week.