Combine butter, cooked & shredded chicken, soup, sour cream, salt, pepper, parmesan cheese and milk. Add cooked noodles.
Pour into a sprayed/greased 13x9 casserole dish. Sprinkle mozzarella cheese on top.
Bake in a 350 degree oven for 30 minutes
Top with Panko bread crumbs, bake ten minutes more.