Preheat oven to 375°. Lightly grease 2-quart shallow baking dish.
Mix Wish-Bone® Ranch Dressing & Seasoning Mix, Hellmann’s® or Best Foods® Real Mayonnaise and milk in large bowl, stirring well to combine. Add chicken, broccoli, noodles and if desired, crumbled bacon.
Pour into prepared baking dish. Bake covered 20 minutes. Uncover; sprinkle with cheese and bake until heated through and cheese has melted, about 10 minutes.