Crush the Golden Grahams. I like to have a good mix of rubble and bigger pieces.
Melt the butter in a large pot. Add the marshmallow and cook until they melt completely. You could also do this in the microwave, but I don’t have one.
Mix in the Golden Grahams. Coat completely with the marshmallow.
Pour the mixture into a 9×13 pan coated with cooking spray. You can sprinkle in some of the chips now, but they start to melt. I like my chips to stay whole, so I add them later.
I spray a piece of wax paper or parchment with a little cooking spray and press it into the pan.
Sprinkle with milk chocolate chips.
Let cool completely. Cut into squares.