Cheesy, creamy, and irresistibly comforting — this Monterey Chicken Spaghetti casserole takes weeknight dinners to the next level. With tender chicken, hearty pasta, a velvety sauce, and a crispy onion topping, it’s the kind of dish that wins over both kids and adults. Perfect for family dinners, potlucks, or meal prep, this baked spaghetti recipe is one you’ll want to make again and again.
Why This Recipe is a Keeper
- Rich and Creamy Texture: The combination of sour cream and cream of chicken soup creates a luscious sauce that coats every strand of spaghetti.
- Packed with Protein & Veggies: Juicy chicken and spinach make it filling and wholesome.
- Cheesy Goodness: Monterey Jack cheese melts into the dish for the ultimate gooey comfort.
- Crunchy Finish: A golden topping of French Fried Onions adds texture and flavor contrast.
- Crowd-Friendly: This casserole serves a crowd, making it ideal for holidays, gatherings, or busy weeknights.
Ingredients You’ll Need
- 12 ounces dried spaghetti
- 4 cups cooked chicken, chopped (rotisserie chicken works beautifully)
- 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 well
- 2 cups shredded Monterey Jack cheese, divided
- 2 garlic cloves, minced
- 1 (6-ounce) can French’s French Fried Onions, divided
Step-by-Step Instructions
Step 1: Preheat the Oven
Set your oven to 350°F (175°C). Grease a 9×13-inch baking dish with cooking spray or butter to prevent sticking.
Step 2: Cook the Pasta
Bring a large pot of salted water to a boil. Cook the spaghetti until al dente, following the package directions. Drain and set aside.
Step 3: Prepare the Filling
In a large mixing bowl, combine:
- Cooked chicken
- Sour cream
- Cream of chicken soup
- Drained spinach
- 1 cup shredded Monterey Jack cheese
- Minced garlic
- Half of the French Fried Onions
Stir until everything is evenly mixed into a creamy filling.
Step 4: Mix Pasta with Filling
Add the cooked spaghetti to the bowl of creamy chicken mixture. Toss until every strand of spaghetti is coated in the rich sauce.
Step 5: Assemble the Casserole
Transfer the mixture into the greased baking dish. Spread it evenly for consistent cooking.
Step 6: Add the Toppings
Sprinkle the remaining 1 cup of Monterey Jack cheese evenly across the top. Finish with the rest of the French Fried Onions for that golden crunch.
Step 7: Bake
Place the casserole in the oven and bake uncovered for 40 to 50 minutes, or until:
- The cheese is melted and bubbly.
- The onions are golden brown.
- The casserole is heated through.
Timing Overview
- Prep Time: 15 minutes
- Cook Time: 50 minutes
- Total Time: 1 hour 5 minutes
Makes 8 servings.
Tips and Tricks for Success
- Drain the Spinach Well: Extra moisture can make the casserole watery. Use paper towels or a clean kitchen towel to squeeze out excess liquid.
- Cheese Variations: While Monterey Jack is mild and creamy, you can swap in sharp cheddar, mozzarella, or even a Mexican cheese blend.
- Make Ahead: Assemble the casserole a day in advance, cover tightly, and refrigerate. Bake just before serving.
- Add Some Spice: Stir in diced jalapeños, red pepper flakes, or a splash of hot sauce for a kick.
- Protein Swap: Try shredded turkey, ham, or even ground beef for a twist.
- Leftover Storage: Store in an airtight container in the refrigerator for up to 3 days. Reheat in the oven for best results.
Serving Suggestions
This casserole is a hearty dish on its own, but it pairs wonderfully with lighter sides:
- Fresh Green Salad: A crisp salad with lemon vinaigrette helps balance the richness.
- Garlic Bread: Perfect for scooping up extra sauce.
- Steamed Vegetables: Broccoli, carrots, or asparagus make colorful, healthy sides.
- Fruit Salad: Fresh fruit lightens the meal and adds a refreshing contrast.
Why You’ll Love Monterey Chicken Spaghetti
This isn’t just another pasta bake — it’s the perfect balance of creamy, cheesy, and crunchy. The sauce clings to the spaghetti, the chicken adds protein, the spinach brings nutrition, and the onion topping seals the deal with crunch. Whether you’re cooking for a weeknight family dinner, preparing freezer meals, or feeding a group, this casserole delivers big flavors with little effort.
It’s comfort food at its best — easy, adaptable, and guaranteed to disappear fast!
FAQs About Monterey Chicken Spaghetti
Can I make this casserole ahead of time?
Yes! You can assemble the casserole up to 24 hours in advance. Store it covered in the fridge, then bake as directed when ready to serve.
What kind of chicken works best?
Rotisserie chicken is quick and convenient, but you can also use leftover grilled or baked chicken breasts, thighs, or even turkey.
Can I freeze Monterey Chicken Spaghetti?
Absolutely. Assemble the casserole without baking, cover tightly, and freeze for up to 2 months. When ready to eat, thaw overnight in the fridge and bake as directed.
Can I use fresh spinach instead of frozen?
Yes. Just sauté it lightly to remove moisture before adding it to the filling.
What other toppings can I use instead of fried onions?
Crushed Ritz crackers, panko breadcrumbs, or even potato chips can be used as a fun alternative topping.
How do I reheat leftovers?
For best results, reheat in the oven at 350°F until warmed through. Microwave works in a pinch but may soften the topping.
Final Word: If you’re craving the ultimate comfort food that’s creamy, cheesy, and family-approved, this Monterey Chicken Spaghetti casserole will quickly become a staple in your kitchen.