Monterey Chicken Spaghetti is a hearty, comforting casserole that combines tender chicken, creamy sauce, and melted Monterey Jack cheese with a twist of nutritious spinach. It’s the perfect dish for a family dinner, bringing together familiar flavors with a bit of added flair to elevate a classic spaghetti dish into something special. With each bite, you’ll enjoy the savory taste of chicken, the rich creaminess from sour cream and cream of chicken soup, and the subtle sharpness of Monterey Jack cheese. The spinach adds color, texture, and a boost of nutrients, making this dish as wholesome as it is delicious.

Whether you’re looking for a quick dinner fix or a crowd-pleasing meal to bring to gatherings, Monterey Chicken Spaghetti is versatile and sure to satisfy. It’s easy to prepare, requiring only a few simple steps, and can be made ahead, making it ideal for busy weeknights or entertaining. The familiar, kid-friendly ingredients make it a hit with the whole family, and the cheesy, bubbly top layer with crispy French-fried onions brings out flavors and textures everyone will love.

Why You’ll Love Monterey Chicken Spaghetti

There are many reasons why Monterey Chicken Spaghetti is a favorite among casserole lovers:

Ease of Preparation: With a straightforward ingredient list and minimal prep, it’s a breeze to put together.
Kid-Friendly Ingredients: The mild Monterey Jack cheese, chicken, and creamy sauce make it a hit with younger family members.
Make-Ahead Option: Prepare it in advance and simply bake when needed; it’s also freezer-friendly for easy meal planning.
Nutritious and Well-Balanced: Chicken offers a solid protein base, while spinach adds fiber, vitamins, and minerals to the dish.

Overall, Monterey Chicken Spaghetti is a satisfying, nutritious meal that combines convenience with delicious flavor, making it a go-to choice for any night of the week.

Key Ingredients in Monterey Chicken Spaghetti

Spaghetti

Spaghetti is an excellent choice for this casserole because it has a familiar texture that pairs well with creamy sauces, and its thin, long shape allows it to capture and cling to the sauce, ensuring each bite is flavorful. When baked, spaghetti retains a satisfying al dente texture that stands up to the heavier sauce and cheese. For those looking to switch things up, other pasta types, such as fettuccine, penne, or rotini, can be used as alternatives. These shapes also hold the sauce well and provide slight variations in texture, allowing you to personalize the dish according to your preference.

Cooked Chicken

The cooked chicken in this recipe adds a hearty, protein-rich component, giving the dish substance and flavor. Options for cooked chicken include shredded rotisserie chicken, leftover grilled or roasted chicken, or poached chicken breasts. Using rotisserie chicken can save time and add extra flavor, as it’s already seasoned. For a quicker preparation, many stores also sell pre-cooked, shredded chicken, which can be a convenient option. Leftover chicken is ideal for reducing waste, and using a pre-cooked option keeps the prep minimal while adding a homey, familiar taste to the casserole.

Sour Cream & Cream of Chicken Soup

These two ingredients are essential for creating the creamy, tangy base of the casserole. Sour cream brings a mild tanginess that cuts through the richness of the dish, while the cream of chicken soup contributes both a smooth texture and additional chicken flavor, intensifying the dish’s savory profile. Together, they create a sauce that coats the pasta and chicken, binding everything together. If you prefer a homemade touch, you can prepare a simple cream of chicken soup from scratch using chicken broth, milk, and a thickening agent like flour or cornstarch.

Monterey Jack Cheese

Monterey Jack cheese is perfect for this casserole due to its mild, creamy flavor and excellent melting properties. It adds a subtle richness without overpowering the other ingredients, and its mild taste makes it a favorite for all ages. As it melts, it creates a smooth, gooey texture that enhances the casserole’s comforting appeal. If you’re looking to experiment with other cheeses, options like Cheddar or Mozzarella can work well, adding slightly different flavors and textures.

Spinach

Spinach brings both nutritional and visual appeal to the dish, adding a vibrant pop of green that contrasts beautifully with the creamy base. It’s a nutrient-dense vegetable rich in vitamins A and C, iron, and fiber, enhancing the health profile of the casserole. In this recipe, frozen spinach is convenient because it’s pre-washed and chopped, but if you prefer fresh spinach, you can sauté and add it directly to the mixture.

French-Fried Onions

French-fried onions add a delightful crunchy topping and a burst of savory flavor that complements the creaminess of the casserole. When baked, they turn golden brown and provide a satisfying contrast to the soft noodles and cheese. If you don’t have French-fried onions on hand, crispy panko breadcrumbs or homemade fried onions are good alternatives.

Ingredient Variations and Substitutions

Alternative Cheeses: Cheddar or Mozzarella are both great substitutes if Monterey Jack isn’t available. Cheddar adds a sharp, tangy note, while Mozzarella brings a creamy, stretchy quality.
Cream of Chicken Soup Substitutes: A homemade version made from chicken broth, milk, and a thickener can be used to reduce sodium or control flavors. Alternatively, cream of mushroom or celery soup can be used for a different flavor profile.
Vegetable Variations: Additions like broccoli, bell peppers, or mushrooms can make the dish more colorful and increase its nutritional value. Simply chop and sauté these vegetables before adding them to the mixture to avoid excess moisture in the casserole.

With these ingredients and variations, Monterey Chicken Spaghetti offers flexibility and a balanced, flavorful profile that can easily be tailored to your taste.

Step-by-Step Recipe Instructions

1️⃣ Preheat the Oven

Start by preheating your oven to 350°F (175°C). This temperature is ideal for baking casseroles, allowing them to heat through evenly without drying out. As the oven warms, lightly grease a 9×13-inch baking dish with cooking spray. This will help prevent the casserole from sticking to the sides, making serving and cleanup much easier.

2️⃣ Cook the Spaghetti

Bring a large pot of salted water to a rolling boil. Adding salt to the water enhances the pasta’s flavor and ensures the spaghetti will be well-seasoned. Once the water is boiling, add the spaghetti and cook it according to package directions, typically 8-10 minutes, until al dente. “Al dente” means the pasta should be firm to the bite, which will hold up well during baking. Be careful not to overcook, as it will soften further in the oven. For extra flavor, you can add a drizzle of olive oil or a clove of garlic to the water. Once cooked, drain the pasta thoroughly and set it aside.

3️⃣ Mix the Filling

In a large mixing bowl, combine the cooked chicken, two cans of cream of chicken soup, and the container of sour cream. These ingredients create a creamy, savory base for the casserole. Add the thawed and drained spinach to the bowl, mixing it well to distribute the greens evenly. Next, add 1 cup of shredded Monterey Jack cheese for richness and creaminess. Finally, stir in the minced garlic and half of the French-fried onions, which will provide a subtle hint of garlic flavor and a bit of crunch inside the casserole.

As you mix, make sure each ingredient is evenly incorporated. A thorough mix will ensure every bite has a balanced flavor and that the chicken and cheese are evenly distributed. Each component plays a role: the creaminess from the sour cream and soup, the cheese’s meltiness, and the spinach’s slight bitterness, creating a satisfying blend of flavors and textures.

4️⃣ Combine with Pasta

Add the cooked spaghetti to the chicken mixture in the bowl. Using tongs or a large spoon, gently toss everything together, ensuring the pasta is well-coated with the creamy filling. Take your time to mix thoroughly; every strand of spaghetti should be evenly coated to prevent dry spots in the casserole. This step is essential for creating a cohesive, flavorful base, as it allows the sauce to infuse into the pasta before baking.

5️⃣ Assemble the Casserole

Once the pasta and filling are fully combined, pour the mixture into the prepared baking dish. Use a spatula to spread it out evenly, pressing it gently to create a uniform layer. This ensures even cooking and a consistent texture throughout. Sprinkle the remaining 1 cup of shredded Monterey Jack cheese over the top, followed by the rest of the French-fried onions. The cheese will melt and become bubbly, while the onions add a crispy, golden layer on top, enhancing both flavor and visual appeal.

6️⃣ Bake

Place the assembled casserole in the preheated oven and bake it uncovered for 40 to 50 minutes. This baking time allows the flavors to meld together while the cheese melts and the onions turn a golden brown. Keep an eye on the casserole after about 40 minutes; you want it to be hot and bubbly, with the edges lightly browned. The French-fried onions should be crispy, providing a delightful contrast to the creamy filling beneath.

To test for doneness, look for a golden crust and ensure the casserole is hot all the way through. If it’s browning too quickly, you can loosely cover it with foil for the last 10 minutes of baking. Avoid overcooking, as this can dry out the casserole. Once done, remove it from the oven and let it cool for a few minutes before serving. This brief rest will allow the cheese to set slightly, making it easier to serve and enhancing the flavors.

With these easy steps, your Monterey Chicken Spaghetti will come out perfectly creamy, cheesy, and flavorful, ready to be enjoyed by everyone at the table.

Serving Suggestions

Monterey Chicken Spaghetti is a rich and filling casserole, so pairing it with light and refreshing side dishes can create a balanced meal. A crisp green salad with a simple vinaigrette or a Caesar salad complements the creamy texture of the casserole without overwhelming it. Garlic bread or dinner rolls also make excellent side options, allowing you to scoop up every bit of the creamy sauce and add a satisfying crunch to each bite. For added flavor and a burst of color, garnish the casserole with freshly chopped parsley or chives just before serving. This final touch enhances both the flavor and presentation, giving the dish a bright, fresh look.

Storage and Reheating Tips

To store leftovers, place the casserole in an airtight container and refrigerate for up to 3-4 days. For longer storage, you can freeze the casserole in individual portions or as a whole, ensuring it’s tightly wrapped or placed in a freezer-safe container to prevent freezer burn. Frozen casserole can last up to 2-3 months.

When reheating, preheat the oven to 350°F (175°C) and cover the dish with foil to retain moisture. Bake until heated through, about 20-30 minutes for large portions. For quicker reheating, microwave individual servings, covering the dish with a microwave-safe cover and stirring halfway through. This approach helps preserve the casserole’s creamy texture and ensures it heats evenly without drying out.

FAQs

1. Can I use a different type of cheese in this recipe?

Yes, you can easily swap out Monterey Jack cheese for other types of cheese based on your taste preferences. Cheddar cheese is a popular alternative; it adds a sharper, tangier flavor that pairs well with the creamy base. For a milder option, Mozzarella is also a good choice, bringing a stretchy, gooey texture. You could even use a blend of cheeses, such as Cheddar and Mozzarella, to achieve a mix of flavors and textures. Experiment with your favorite cheese varieties to find the flavor combination that suits you best.

2. Can I make Monterey Chicken Spaghetti ahead of time?

Absolutely! To make this dish in advance, prepare the casserole as directed but don’t bake it. Instead, cover the dish tightly with plastic wrap or foil and refrigerate for up to 24 hours. When you’re ready to serve, remove the casserole from the refrigerator, let it sit at room temperature for about 15-20 minutes, then bake at 350°F (175°C) as directed, adding an extra 5-10 minutes if needed to ensure it’s heated through. Alternatively, you can freeze the unbaked casserole for up to 2-3 months, then thaw it in the refrigerator overnight before baking.

3. How can I make this dish lighter?

To reduce the calorie content, consider using Greek yogurt instead of sour cream. Greek yogurt provides a similar creamy texture with less fat and adds a bit of protein. You can also use a reduced-fat or low-sodium cream of chicken soup to cut down on sodium and fat. Opting for a lighter cheese, or using half the amount of cheese in the recipe, can also help reduce calories without compromising on flavor.

4. Can I use fresh spinach instead of frozen?

Yes, fresh spinach works well in this recipe. If using fresh spinach, you’ll need about 2-3 cups, as it wilts down significantly. Lightly sauté the spinach in a pan over medium heat until it’s wilted, then drain any excess liquid before mixing it into the casserole. This prevents extra moisture from affecting the casserole’s consistency during baking.

5. What can I substitute for French-fried onions?

If you don’t have French-fried onions, you can use panko breadcrumbs mixed with a bit of melted butter to create a crispy topping. Another option is to sauté sliced onions until golden brown and use them as a topping. These alternatives will provide a similar crunchy texture and savory flavor, adding a nice contrast to the creamy casserole filling.

Conclusion

Monterey Chicken Spaghetti is a delicious, comforting casserole that brings together creamy, cheesy, and savory flavors in every bite. It’s an ideal choice for family dinners, potlucks, or anytime you’re craving something hearty and satisfying. The combination of tender chicken, spinach, Monterey Jack cheese, and crispy French-fried onions creates a balanced dish that’s both filling and flavorful. Its creamy texture and cheesy top layer make it a guaranteed crowd-pleaser, especially with its ease of preparation and kid-friendly ingredients.

One of the best aspects of this recipe is its versatility. Whether you swap in a different cheese, add extra vegetables, or experiment with alternative toppings, Monterey Chicken Spaghetti adapts beautifully to different tastes and dietary needs. Feel free to customize the ingredients to suit your family’s preferences, making it your own signature dish. So gather your ingredients, get creative with flavors, and enjoy the comfort of a warm, homemade casserole that’s as adaptable as it is delicious. Monterey Chicken Spaghetti is a dish you’ll want to come back to time and again, each time discovering new ways to make it even more delightful.

Monterey Chicken Spaghetti

Author: Christophe

Print Recipe

Description

This creamy and cheesy Monterey Chicken Spaghetti is a comforting casserole loaded with tender chicken, savory spinach, and crispy French-fried onions. Perfect for family dinners and easy to make ahead!

Ingredients

Scale

12 ounces dried spaghetti
4 cups cooked chicken, chopped
1 (16-ounce) container sour cream
2 (10.5-ounce) cans unsalted cream of chicken soup
1 (10-ounce) package frozen spinach, thawed and drained
2 cups shredded Monterey Jack cheese, divided
2 garlic cloves, minced
1 (6-ounce) can French’s French Fried Onions, divided

Instructions

1️⃣ Preheat the Oven: Set your oven to 350°F (175°C). Lightly grease a 9×13-inch baking dish with cooking spray.

2️⃣ Cook the Spaghetti: Bring a large pot of salted water to a boil. Add the spaghetti and cook according to the package directions until al dente. Drain and set aside.

3️⃣ Mix the Filling: In a large mixing bowl, combine the cooked chicken, cream of chicken soup, sour cream, drained spinach, 1 cup of Monterey Jack cheese, minced garlic, and half of the French-fried onions. Stir well until fully incorporated.

4️⃣ Combine with Pasta: Add the cooked spaghetti to the chicken mixture and stir until the pasta is evenly coated.

5️⃣ Assemble the Casserole: Pour the spaghetti mixture into the prepared baking dish and spread it evenly. Sprinkle the remaining Monterey Jack cheese over the top, followed by the remaining French-fried onions.

6️⃣ Bake: Place the casserole in the oven and bake uncovered for 40 to 50 minutes, or until it’s hot and bubbly and the onions are golden brown.

Notes

Make-Ahead Option: Assemble the casserole, cover, and refrigerate for up to 1 day. When ready to bake, remove from the refrigerator 30 minutes prior, and bake as directed.
Vegetable Variations: Add some diced bell peppers or mushrooms for extra flavor and color.
Storage: Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. Reheat in the oven or microwave until warmed through.