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Firehouse Spaghetti Casserole: Creamy Chicken & Cheese Bake

Firehouse Spaghetti Casserole

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Prep Time 20 minutes
Cook Time 50 minutes
Total Time 1 hour 10 minutes
Servings 10

Ingredients
  

  • 12 oz spaghetti uncooked, broken in half
  • 5 cups cooked chicken cubed (rotisserie chicken works well)
  • 1 can condensed cream of chicken soup 10.75 oz, undiluted
  • 1 can condensed cream of mushroom soup 10.75 oz, undiluted
  • 1 cup sour cream
  • 1/2 cup whole milk
  • 2 cups mozzarella cheese shredded, part-skim
  • 1 cup Parmesan cheese grated
  • 1 medium onion chopped
  • 2-3 ribs celery chopped
  • 1 can mushroom stems and pieces 4 oz, drained
  • 1/4 cup butter melted, divided (2 tbsp for sauce, rest for topping)
  • 1 1/2 cups cornflakes crushed
  • 2 tbsp dried parsley flakes
  • 1/2 tsp garlic powder
  • 1/2 tsp salt
  • 1/4 tsp black pepper

Instructions
 

  • Preheat your oven to 350°F (175°C). Lightly grease a deep 3-quart baking dish (9x13 inch) with cooking spray or butter.
  • Bring a large pot of salted water to a boil. Cook the broken spaghetti according to package directions until al dente. Drain well and set aside.
  • In a very large mixing bowl, combine the cream of chicken soup, cream of mushroom soup, sour cream, milk, 2 tablespoons of the melted butter, dried parsley, garlic powder, salt, and pepper. Whisk until smooth.
  • Stir in the shredded mozzarella, grated Parmesan, chopped onion, chopped celery, and drained mushrooms into the sauce mixture.
  • Add the cubed cooked chicken and the drained spaghetti to the bowl. Toss everything together until the pasta and meat are evenly coated in the creamy sauce.
  • Pour the mixture into the prepared baking dish, spreading it out evenly. The dish will be quite full.
  • In a small bowl, mix the crushed cornflakes with the remaining melted butter until the flakes are lightly coated.
  • Sprinkle the buttery cornflake mixture evenly over the top of the casserole.
  • Bake uncovered for 45 to 50 minutes, or until the sauce is bubbly around the edges and the topping is golden brown. Let sit for 5 minutes before serving.