Mix 1 cup softened butter with peanut butter until well combined. Add powdered sugar and graham cracker crumbs. Mix well.
Press peanut butter mixture into a 9x13 pan.
Refrigerate for 10 min.
In a microwave safe dish melt the 1/2 cup butter and chocolate chips stirring every minute or so. Continue until they have made a creamy chocolate glaze. Pour/spread over the peanut butter mixture. Refrigerate 30 minutes. Cut into small squares.
*NOTE: this must be refrigerated.