Add your graham crackers, powdered sugar, melted butter, and cup of peanut butter to a large mixing bowl.
Mix on high until well combined and smooth. Grease a 9x13 casserole dish and press mixture into the bottom and smooth out evenly.
To a microwave safe bowl, add milk chocolate chips and remaining peanut butter. Microwave in one minute intervals until melted and smooth. Stirring frequently.
Pour over peanut butter mixture and smooth out evenly. Place in the fridge for one hour. Slice into even squares. Serve and enjoy!