Chicken Spaghetti Recipe for a Creamy Weeknight Dinner

Tender chicken, twirls of spaghetti, and a creamy cheddar sauce make this chicken spaghetti recipe a cozy dinner that’s easy to share. It’s mixed on the stovetop, then baked until hot and bubbling, so the top gets a light layer of melted cheese.

The sauce gets its creamy texture from condensed soup, sour cream, broth, and cheddar. Use cooked chicken to save time, or cook chicken ahead and shred it when you’re ready. You’ll also find simple swaps, make-ahead tips, and ways to reheat leftovers without drying them out.

Why This Chicken Spaghetti Recipe Belongs in Your Dinner Rotation

This version brings familiar ingredients together in a casserole that’s easy to adapt to your taste. The stovetop sauce comes together while the pasta cooks, and a short bake warms the filling through.

A creamy, cheesy sauce coats every strand

Cheddar adds a savory, tangy taste, while sour cream gives the sauce a smooth finish. Condensed cream of chicken soup thickens the mix, and chicken broth helps it coat the pasta without becoming too heavy.

Diced tomatoes with green chiles add color and a mild kick. For a smoother, less spicy casserole, drain the tomatoes or use a mild can.

Familiar ingredients make it easy to customize

Cooked chicken, spaghetti, cheddar, and tomatoes with green chiles form the heart of the dish. Onion and bell pepper add flavor, but you can leave either out or swap in another vegetable, such as mushrooms.

Keep the pasta, creamy base, and chicken for the best texture. The seasoning and vegetables are flexible, so you can adjust them to suit your household.

What to Gather for Chicken Spaghetti

This recipe makes about six servings and fits a 9-by-13-inch baking dish. Use cooked chicken, such as shredded rotisserie chicken or chicken breast cooked in advance.

Chicken, spaghetti, and the creamy base

You’ll need 12 ounces of spaghetti and 3 cups of cooked, shredded chicken. The chicken should be fully cooked before it goes into the casserole; if you cook it at home, check that the thickest part reaches 165°F with a food thermometer.

Gather 1 can (10.5 ounces) of condensed cream of chicken soup, 1 cup sour cream, and 1 cup chicken broth. Keep a little extra broth nearby in case the sauce needs thinning.

Cheese, vegetables, and seasonings

The rest of the ingredients are 2 1/2 cups shredded sharp cheddar, 1 small diced onion, 1 diced green bell pepper, and 1 can (10 ounces) diced tomatoes with green chiles. You’ll also need 1 tablespoon butter, 1/2 teaspoon garlic powder, 1/2 teaspoon black pepper, and salt to taste.

Divide the cheddar: stir 2 cups into the filling and reserve 1/2 cup for the top. Choose mild or hot tomatoes with green chiles to control the heat.

Simple swaps for common dietary needs

Monterey Jack or a cheddar-Jack blend can replace cheddar. For a gluten-free version, use gluten-free spaghetti and a gluten-free condensed soup; check the pasta early, since its cooking time and texture can differ.

You can replace sour cream with plain Greek yogurt, though the sauce may taste tangier. For a dairy-free version, use suitable dairy-free soup, sour cream, and cheese products. These swaps can change how thick or smooth the sauce feels.

How to Make This Chicken Spaghetti Recipe with Tender Pasta

Set the oven to 350°F and grease a 9-by-13-inch baking dish. The pasta and sauce are prepared on the stovetop, then baked together for about 20 minutes.

Cook the pasta just shy of tender

Boil the spaghetti in salted water, using the package timing as a guide. Cook it about two minutes less than the stated time; it will soften further in the oven.

Drain the pasta well, but don’t rinse it. The light starch on the noodles helps the sauce cling.

Build the sauce and combine the filling

While the pasta cooks, melt the butter in a large skillet over medium heat. Add the onion and bell pepper, then cook for 4 to 5 minutes, stirring now and then, until softened.

Stir in the soup, sour cream, broth, tomatoes with green chiles, garlic powder, black pepper, and 2 cups of cheddar. Heat gently until the cheese melts; avoid boiling the sauce. Fold in the chicken and drained spaghetti, then taste and add salt as needed. If the sauce looks too thick, stir in broth a few tablespoons at a time.

Bake until hot and bubbling

Spoon the mixture into the prepared baking dish and spread it evenly. Sprinkle the reserved cheddar over the top, then bake uncovered for 20 to 25 minutes, until hot and bubbling around the edges.

Check the center with a food thermometer. It should reach 165°F. Let the casserole rest for about five minutes before serving so the sauce can settle.

Make Chicken Spaghetti Turn Out Right Every Time

A few small choices help keep the casserole creamy rather than dry or soft. Pay close attention to pasta time and sauce thickness before the dish goes into the oven.

Keep the pasta from turning mushy

Undercook the spaghetti by about two minutes, since it continues to soften as it bakes and rests. If your oven runs hot or the casserole is already bubbling before 20 minutes, check the center and take it out once it’s heated through.

Avoid a long bake. Extra time can make the pasta too soft and leave less moisture in the sauce.

Balance a sauce that’s too thick or too thin

Add broth gradually if the sauce is stiff or hard to stir. A few tablespoons at a time gives you control and keeps the filling from becoming watery.

If the sauce seems loose, let it simmer gently for a few minutes before adding the pasta. It will also thicken as it bakes and rests.

Check chicken doneness and handle leftovers safely

The USDA says chicken should reach 165°F, measured with a food thermometer. This applies when cooking chicken for the recipe and when checking that the casserole has heated through.

Refrigerate leftovers promptly in a covered container, and use them within 3 to 4 days. Reheat leftovers to 165°F.

Serve, Store, and Reheat Chicken Spaghetti

The casserole is rich and filling, so a crisp or fresh side works well. You can also prep parts of the recipe ahead to make dinner easier on a busy night.

Pair it with a crisp, simple side

Serve chicken spaghetti with a green salad, steamed broccoli, or roasted green beans. A side with fresh, crisp flavors balances the creamy sauce.

For a larger meal, add sliced fruit or warm dinner rolls. Keep the side simple so the casserole stays at the center of the plate.

Refrigerate and reheat without drying it out

Store cooled leftovers in a covered container in the fridge for up to 3 to 4 days. Reheat a portion in the microwave or warm a larger amount, covered, in a 325°F oven.

Stir a splash of broth or water into each portion before reheating to loosen the sauce. Heat until the center reaches 165°F, as recommended by the USDA.

Prep components ahead for an easier dinner

Cook and shred the chicken, chop the onion and pepper, and measure the seasonings up to a day ahead. Store the cooked chicken and chopped vegetables in separate covered containers in the refrigerator.

For the best pasta texture, cook and combine the casserole just before baking. You can also assemble it in the baking dish, cover, and refrigerate for up to 24 hours; bake it straight from the fridge and allow extra time, checking the center for 165°F. Keep it chilled until it goes into the oven.

Bring a Comforting Chicken Spaghetti Dinner to the Table

This baked chicken spaghetti combines cooked chicken, tender pasta, and a smooth cheddar sauce in one easy casserole. Slightly undercook the spaghetti, adjust the sauce with broth as needed, and check the center temperature before serving.

Choose the cheese and vegetables your family likes, then pair the casserole with a fresh side. Serve it hot tonight, or prep the components ahead for an easier dinner later.