01 -
Line an 20x20 cm square pan with parchment paper. Melt the butter in a microwave-safe bowl for approximately 1 minute, then set aside.
02 -
Place graham crackers in a large resealable bag and crush them into fine crumbs using a rolling pin. Set aside.
03 -
In a large bowl, combine 360 grams of peanut butter with the melted butter using a silicone spatula until fully blended.
04 -
Gradually add powdered sugar in two additions, mixing thoroughly after each until fully incorporated.
05 -
Gently fold the graham cracker crumbs into the peanut butter mixture until a thick, moldable dough forms.
06 -
Evenly press the peanut butter mixture into the prepared pan. Cover with a second piece of parchment paper and smooth the surface using the flat bottom of a small measuring cup.
07 -
Combine chocolate chips with remaining 60 grams peanut butter in a microwave-safe bowl. Microwave at half power, stirring every 30 seconds, until smooth, about 3 minutes total.
08 -
Pour the melted chocolate mixture over the peanut butter base and spread evenly. Refrigerate for 90 minutes to set.
09 -
Lift the set bars from the pan using parchment paper. Lightly score the top with a knife to create square portions, then cut along the lines. Serve chilled.