Line an 8x8 baking pan with parchment paper and set aside.
Melt the butter and crush the Saltines in a ziplock baggie. Mix the powdered sugar with the melted butter and almost all of the crushed Saltines (leave a handful for the topping!) in a bowl.
Fold in the peanut butter and mix well.
Lay the mixture out into the prepared baking sheet.
In a non-stick skillet, melt the chocolate chips with remaining 2 Tablespoons of peanut butter until smooth. Then pour over the top of the peanut butter mixture and sprinkle the rest of the Saltines across the top.
Cover and refrigerate for a couple of hours. Leave out for 10 minutes, then cut into squares.