In a large mixing bowl melt the butter. Add graham crackers and mash like crazy. The goal is to make it look like wet sand. Add powdered sugar and 1 cup of peanut butter. Blend well with a hand mixer. You want it very smooth. Press into the baking dish.
In a separate bowl microwave chocolate chips and 2 tablespoons of peanut butter. I did a few rounds of 20 seconds. Stir between each microwave session. Once melted and smooth, pour over the peanut butter mixture.
Chill in the freezer for one hour then cut into desired bar size.
I prefer my peanut butter treats frozen but these can be served thawed or at refrigerator temperature, whatever you prefer! Store leftovers in the fridge or freezer.