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Chicken spaghetti bake being served out of casserole dish with wooden spatula.
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Chicken Spaghetti Bake

This Chicken Spaghetti Bake is a cozy family meal filled with tender chicken, fresh broccoli and spaghetti in a creamy homemade sauce, topped with cheese and baked to perfection! Perfect for get togethers, potlucks or a make ahead freezer meal.
Course: Main Course
Cuisine: American
Prep Time: 20 minutes
Cook Time: 30 minutes
Servings: 12
Author: Heather

Ingredients

  • 1 pound spaghetti
  • 4 cups cooked and chopped chicken breast, about 2 pounds
  • 3 cups broccoli
  • ½ cup salted butter
  • 1 medium onion, chopped
  • 4 oz mushrooms, finely diced
  • 2 cloves garlic , minced
  • ½ cup all purpose flour
  • 2 teaspoons salt
  • ½ teaspoon black pepper
  • 2 cups chicken broth
  • 2 cups milk
  • 1 cup shredded mozzarella cheese
  • 2 cups shredded sharp cheddar cheese
  • 1 cup sour cream

Instructions

  • Preheat oven to 375°F and lightly grease a deep 9x13 casserole dish.
  • Cook spaghetti to al dente according to package directions. Cook chicken if needed.
  • In a large sauce pan, melt butter over medium heat. Add the onions and mushrooms and cook until the onions are soft and translucent. About 3-4 minutes.
  • Add the minced garlic and cook another minute until fragrant.
  • Stir in the flour, salt and pepper. Cook for another minute.
  • Slowly stir in the chicken broth, stirring constantly.
  • Then slowly stir in the milk.
  • Bring to a low boil and boil until thickened, about 4-5 minutes, stirring often.
  • Stir in the shredded mozzarella and 1 cup shredded cheddar a little at a time, make sure each addition is melted before adding more.
  • Then stir in the sour cream.
  • Pour the sauce over the cooked and drained spaghetti and stir it together.
  • Stir in the cooked chicken and broccoli.
  • Add the pasta to the prepared casserole dish.
  • Top the casserole with the remaining cup of cheddar cheese.
  • Bake casserole for 25-30 minutes until bubbly and cheese is melted.

Nutrition

Calories: 466kcal | Carbohydrates: 38g | Protein: 26g | Fat: 23g | Saturated Fat: 13g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 6g | Trans Fat: 1g | Cholesterol: 94mg | Sodium: 876mg | Potassium: 533mg | Fiber: 2g | Sugar: 5g | Vitamin A: 832IU | Vitamin C: 25mg | Calcium: 280mg | Iron: 1mg
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