Preheat oven 375.
Beat cold butter to break it up.
Add sugars and beat creamy.
Add eggs and vanilla to combine well.
Add blue coloring and a drop of violet until you reach the blue you want. (If you skip the violet the cookies will develop a green hue when baked.)
Add dry ingredients on low.
Add chips.
Roll dough into 4 ounce mounds. (This made 13 cookies)
Stuff an Oreo into the center of each, wrapping the dough around the Oreo.
Bake 10 minutes, then remove the pan and sprinkle the tops with chopped cookies, marshmallow bits and mini chips. Bake an additional 4-5 minutes.
Cool on sheets and then remove to a cooling rack.
