Monterey Chicken Spaghetti

The smell of Monterey Jack cheese bubbling in the oven takes me back to rainy Sunday evenings when my roommate and I would experiment with whatever we had in the fridge. We started with a basic chicken and pasta combo, but once we added that creamy cheese sauce with smoked paprika, it became the dish we fought over leftovers for. Something about the way the sauce clings to every strand of spaghetti just makes you want to curl up on the couch and forget about everything else.

I made this for my sister when she was going through a rough breakup, and she texted me three days later asking for the recipe. She said it was the first thing shed actually wanted to eat in weeks. Now she makes it whenever she needs a hug in food form, which I think is the highest compliment a recipe can get.

Ingredients

• 12 oz spaghetti: Break the noodles in half before cooking for easier serving and better sauce coverage
• 2 cups cooked chicken breast: Rotisserie chicken works perfectly here and saves so much time
• 1 cup red bell pepper, diced: The sweetness balances the rich cheese sauce beautifully
• 1 cup yellow onion, diced: Cook these until theyre translucent and sweet, not browned
• 2 cloves garlic, minced: Add this after the vegetables soften so it doesnt burn
• 2 tbsp unsalted butter: This forms the base of your roux, so dont substitute
• 2 tbsp all-purpose flour: Whisk this constantly for one full minute to cook out the raw flour taste
• 2 cups whole milk: Warm milk helps prevent lumps when making the sauce
• 1 cup Monterey Jack cheese, shredded: Shred it yourself from a block for better melting
• 1/2 cup sharp cheddar cheese, shredded: The sharpness cuts through the rich sauce
• 1/2 cup low-sodium chicken broth: This adds depth without making the sauce too salty
• 1/4 cup sour cream: Stir this in at the end for a tangy finish
• 1/2 tsp salt: Adjust this based on how salty your chicken broth is
• 1/4 tsp ground black pepper: Freshly ground makes a noticeable difference
• 1/4 tsp smoked paprika: This is the secret ingredient that makes people ask whats in it
• 1/2 cup Monterey Jack cheese, shredded: This extra layer on top creates that irresistible golden crust
• 2 green onions, thinly sliced: Add these right before serving for a fresh pop of color

Instructions

Get your oven ready:

Preheat to 375°F and grease a 9x13 baking dish with butter or cooking spray

Cook the pasta:

Boil spaghetti until al dente, then drain immediately so it doesnt get mushy

Sauté the vegetables:

Melt butter in a large skillet, cook onions and peppers for 4 minutes until soft, then add garlic for 1 minute more

Build the sauce base:

Stir in flour for 1 minute, then gradually whisk in milk and broth until smooth

Make it cheesy:

Add Monterey Jack, cheddar, salt, pepper and smoked paprika, stir until completely melted

Combine everything:

Remove from heat, fold in sour cream, chicken and cooked spaghetti until coated

Assemble and bake:

Transfer to your baking dish, top with remaining cheese and bake for 25 minutes until bubbly

Finish with freshness:

Sprinkle with green onions right before serving

Save

My neighbor caught me taking this out of the oven once and immediately asked what smelled so incredible. Now we have a standing date every other week where I make a big pan and we split it. Sometimes the best dinner companions are the ones who live across the hall.

Making It Ahead

You can assemble this casserole up to 24 hours ahead and keep it covered in the refrigerator. Just add 5 minutes to the baking time if its cold from the fridge. I actually think the flavors meld together even better this way.

Easy Variations

Sometimes I throw in cooked bacon or swap the chicken for leftover turkey. My friend adds mushrooms and spinach when she wants more vegetables. The sauce is forgiving enough to handle whatever you throw at it.

Serving Suggestions

A crisp green salad with vinaigrette cuts through the richness perfectly. I also love serving this with roasted broccoli or steamed green beans. And honestly, a glass of Chardonnay doesnt hurt either.

• Keep some extra shredded cheese handy for people who want to top their serving
• Crushed crackers or breadcrumbs on top add a nice crunch
• This freezes beautifully for up to three months

Save

Theres something about pulling this bubbling, golden dish out of the oven that makes a house feel like home. I hope it brings that same comfort to your table.

Recipe FAQs

→ Can I use different pasta shapes?

Yes, while spaghetti works perfectly, you can substitute with penne, rotini, or fettuccine. Just adjust cooking time according to package directions and ensure the pasta is al dente before baking.

→ How do I store leftovers?

Store cooled portions in an airtight container in the refrigerator for up to 4 days. Reheat in the microwave with a splash of milk to restore creaminess, or cover with foil and warm in a 350°F oven.

→ Can I freeze this casserole?

Absolutely! Assemble the dish up to step 7, then wrap tightly in plastic and foil. Freeze for up to 3 months. Thaw overnight in the refrigerator before baking as directed, adding 5-10 minutes to the baking time.

→ What can I substitute for Monterey Jack cheese?

Colby Jack, pepper Jack for spice, or mozzarella work well as substitutes. You can also use all cheddar or a Mexican cheese blend. The key is using a cheese that melts smoothly.

→ How can I make this lighter?

Use low-fat milk and reduced-fat cheeses. You can also increase the vegetables with additional peppers, mushrooms, or spinach. For extra protein without more fat, mix in some white beans.

→ Can I make this spicy?

Add diced jalapeños with the bell peppers, use pepper Jack cheese, or sprinkle in red pepper flakes to taste. A dash of hot sauce in the cheese sauce also adds pleasant heat.