Cook noodles according to package directions. Drain and set aside.
In a medium bowl combine 1/2 cup melted butter, cooked chicken, cream of chicken soup, sour cream, pepper, and chicken broth. Mix well and add in the cooked noodles.
Spray a 9×13 inch baking dish with cooking spray. Pour the noodle mixture into the baking dish. Sprinkle with mozzarella and parmesan cheese. Bake at 350 degrees F. for 40 minutes.