Momofuku Milkbar’s Cornflake Marshmallow Crunch Cookie (Copycat Recipe)

I love, love, love sweet and salty so this cookie is my favorite!  It’s from Christina Tosi’s Momofuku Milk Bar Bakery in NYC.  The combination of sweet/salty buttered cornflake crunchies and roasted marshmallow is a match made in heaven.  I have yet to taste the real thing but with this copycat recipe that my sister…