Brown Chicken. Saute chopped onion in 2 tablespoons of butter until tender. Stir in chicken, soup, milk and cheese. Heat until smooth. Cook macaroni to package instructions. Add noodles to soup mixture. Place mixture in a greased 8x8 pan. Melt remaining butter on stove and stir in cracker crumbs. Sprinkle on top of macaroni mixture. Bake at 350 degrees for 30 mins.