Name: Monterey Chicken Spaghetti Casserole Recipe
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Ingredients: 12 oz spaghetti, cooked and drained; 2 cups cooked chicken, shredded (rotisserie or poached works well); 1 can (10.5 oz) cream of chicken soup; ½ cup sour cream; ½ cup chicken broth (or more for thinning if needed); 1 can (4 oz) diced green chiles; 1 ½ cups shredded Monterey Jack cheese, divided; 1 cup shredded cheddar cheese; 1 teaspoon garlic powder; ½ teaspoon onion powder; ½ teaspoon paprika (optional); Salt and black pepper, to taste; 2 tablespoons chopped parsley or green onions for garnish (optional)

Table of Contents

Craving a hearty, comforting dinner that’s packed with cheesy goodness and full of flavor? This Monterey Chicken Spaghetti Casserole combines tender shredded chicken, creamy sauce, flavorful seasonings, and lots of gooey cheese with spaghetti noodles to create a satisfying dish the whole family will love. It’s an easy-to-make baked casserole that’s perfect for weeknights, gatherings, or prepping ahead for busy days.

What is Monterey Chicken Spaghetti Casserole?

Monterey Chicken Spaghetti Casserole is a creamy, baked pasta dish made with cooked spaghetti, shredded chicken, a savory cream sauce, and a mix of Monterey Jack and cheddar cheeses.

Often enhanced with green chiles, seasonings, or even veggies like bell peppers or mushrooms, this dish delivers bold flavors and a melt-in-your-mouth texture. It’s a variation of traditional chicken spaghetti but with a flavorful Monterey twist that adds depth and richness.

When I First Tried Monterey Chicken Spaghetti Casserole

The first time I tried Monterey Chicken Spaghetti Casserole, I was looking to reinvent leftover rotisserie chicken. I threw in some cheese, pasta, and canned green chiles I had in the pantry—and it turned out incredible.

Creamy, cheesy, and comforting, it was an instant hit at the dinner table. Since then, I’ve made it countless times, experimenting with spices and cheeses to perfect the ultimate version.

Ingredients

12 oz spaghetti, cooked and drained

2 cups cooked chicken, shredded (rotisserie or poached works well)

1 can (10.5 oz) cream of chicken soup

½ cup sour cream

½ cup chicken broth (or more for thinning if needed)

1 can (4 oz) diced green chiles

1 ½ cups shredded Monterey Jack cheese, divided

1 cup shredded cheddar cheese

1 teaspoon garlic powder

½ teaspoon onion powder

½ teaspoon paprika (optional)

Salt and black pepper, to taste

2 tablespoons chopped parsley or green onions for garnish (optional)

Instructions

1. Preheat & Prep

Preheat your oven to 350°F (175°C). Lightly grease a 9×13-inch baking dish or casserole pan with cooking spray.

2. Make the Sauce

In a large mixing bowl, whisk together the cream of chicken soup, sour cream, and chicken broth until smooth. Stir in the green chiles, garlic powder, onion powder, paprika, salt, and pepper. Mix until fully combined.

3. Combine Everything

Cooked spaghetti and shredded chicken should be added to the sauce mixture. Stir in 1 cup Monterey Jack cheese and ½ cup cheddar cheese. Mix everything thoroughly so the pasta and chicken are well-coated.

4. Assemble the Casserole

The mixture should be transferred to a baking dish that has been prepared and spread evenly. Sprinkle the remaining ½ cup of Monterey Jack and ½ cup of cheddar cheese evenly over the top.

5. Bake

In a baking dish, bake the casserole uncovered for 25 to 30 minutes, or until the cheese is melted and the casserole is heated through. For a golden cheesy top, broil for the last 2–3 minutes.

6. Garnish & Serve

Let the casserole rest for 5 minutes before serving. Garnish with chopped parsley or green onions if desired.

Tips for Perfect Casserole

Use Rotisserie Chicken: It’s quick, flavorful, and perfect for this dish.

Add Veggies: Try diced red bell peppers, mushrooms, or spinach to bulk it up.

Make Ahead: Put together the casserole a day ahead, cover, and refrigerate. Bake when ready.

Freeze Friendly: Freeze the unbaked casserole wrapped tightly for up to 3 months. Thaw overnight and bake as directed.

Recipe Variations

Spicy Kick

Add ¼ teaspoon cayenne pepper or some chopped jalapeños to the sauce for a little heat.

Veggie Boost

Mix in steamed broccoli florets or sautéed mushrooms for added nutrition.

Flavor Bomb

Roast a head of garlic and mash it into the sauce for a deeper, richer flavor.

What to Serve With Monterey Chicken Spaghetti Casserole

This cheesy casserole is hearty enough to stand alone, but here are some great sides to complete the meal:

Garlic bread or dinner rolls
Garden salad with a tangy vinaigrette
Roasted or steamed green beans
Fresh fruit for a lighter finish

Storage & Reheating

Refrigerator

Store leftovers in an airtight container in the fridge for up to 4 days.

Reheat

Reheat in the microwave or cover with foil and warm in the oven at 325°F until heated through. Add a splash of broth if it seems dry.

Freezer

Freeze fully assembled but unbaked for up to 3 months. Wrap tightly in foil and thaw overnight before baking.

Nutrition (Per Serving)

Calories: 460

Protein: 25g

Carbs: 36g

Fat: 24g

Saturated Fat: 11g

Sodium: 820mg

Fiber: 2g

Sugar: 4g

Nutrition values are estimates and may vary based on ingredients.

Final Thoughts

Monterey Chicken Spaghetti Casserole is everything you want in a comfort food dish: cheesy, creamy, and packed with flavor. It’s easy to assemble, customizable to suit your taste, and perfect for feeding a hungry family or a dinner crowd.

Whether you’re looking for a weeknight staple or a make-ahead freezer meal, this casserole checks every box. Give it a try—you might just find your new favorite!