This Chicken Parmesan Baked Spaghetti combines tender seasoned chicken, saucy spaghetti, marinara, and plenty of melted mozzarella and Parmesan in one cozy baked pasta dish. It has the familiar flavors of chicken Parmesan without the fuss of breading and frying individual chicken cutlets. The result is a hearty, family-friendly dinner with a golden, cheesy top and plenty of comforting pasta underneath.

Why You’ll Love This Recipe

• Chicken Parmesan flavor without frying: The chicken is seasoned and cooked separately, so you get savory browned chicken without dealing with a breading station or splattering oil.
• Cheesy baked finish: Mozzarella melts over the pasta while Parmesan adds a salty, nutty layer and helps create golden spots on top.
• Simple grocery-store ingredients: Spaghetti, marinara sauce, chicken, and a few everyday seasonings do most of the work.
• Family-friendly: The flavors are familiar and easy to adjust if someone prefers extra cheese, less seasoning, or a little heat.
• Great for leftovers: The baked pasta reheats well for an easy next-day lunch or dinner.

Ingredients

This recipe makes a generous 8 servings in a 9×13-inch baking dish.

• 1 pound spaghetti
• 1 1/2 pounds boneless, skinless chicken breasts
• 2 tablespoons olive oil, divided
• 1 teaspoon Italian seasoning
• 1 teaspoon garlic powder
• 1 teaspoon kosher salt, divided
• 1/2 teaspoon black pepper
• 1/4 teaspoon red pepper flakes, optional
• 1 jar (24 ounces) marinara sauce
• 1/2 cup grated Parmesan cheese, divided
• 2 cups shredded low-moisture mozzarella cheese
• 2 tablespoons chopped fresh parsley, optional

Ingredient Notes

Spaghetti: Regular dried spaghetti works best here. Cook it just until al dente because it will continue cooking in the oven.

Chicken breasts: Cut the chicken into small, even pieces so they cook quickly and distribute easily throughout the baked spaghetti. Chicken thighs can also be used if preferred.

Marinara sauce: Use a thick, flavorful marinara. A sauce that is excessively thin can make the finished casserole watery.

Mozzarella: Low-moisture shredded mozzarella melts smoothly and gives the casserole its classic stretchy, cheesy topping.

Parmesan: Freshly grated Parmesan provides stronger flavor and melts more naturally than shelf-stable powdered Parmesan.

How to Make Chicken Parmesan Baked Spaghetti

1. Cook the Spaghetti

Preheat the oven to 375°F and lightly grease a 9×13-inch baking dish.

Bring a large pot of salted water to a boil. Cook the spaghetti according to the package directions until al dente, usually about 1 minute less than the maximum recommended time. Drain well and set aside.

The pasta should still have a little firmness because it will finish cooking while the casserole bakes.

2. Season and Brown the Chicken

While the pasta cooks, pat the chicken pieces dry. Toss them with Italian seasoning, garlic powder, 1/2 teaspoon kosher salt, black pepper, and red pepper flakes if using.

Heat 1 tablespoon of olive oil in a large skillet over medium-high heat. Add the chicken in a single layer and cook for about 5–7 minutes, turning occasionally, until browned on the outside and cooked through.

The thickest chicken pieces should reach 165°F on an instant-read thermometer. Transfer the chicken to a plate.

3. Combine the Pasta and Marinara

In the same skillet, add the drained spaghetti and marinara sauce. Toss gently until the noodles are evenly coated.

Stir in 1/4 cup of the Parmesan cheese and about half of the cooked chicken. If the pasta looks unusually dry, add a small splash of reserved pasta water before transferring it to the baking dish.

4. Layer the Casserole

Transfer half of the saucy spaghetti mixture to the prepared 9×13-inch baking dish. Sprinkle with half of the remaining chicken and a layer of mozzarella.

Add the rest of the spaghetti and chicken, then finish with the remaining mozzarella and Parmesan.

Spread everything into an even layer so the cheese covers the surface without leaving large dry patches.

5. Bake Until Bubbly and Golden

Cover the baking dish loosely with aluminum foil and bake at 375°F for 20 minutes.

Remove the foil and continue baking for another 10–15 minutes, until the sauce is bubbling around the edges and the mozzarella is fully melted with lightly browned spots on top.

For a more deeply browned cheese topping, place the casserole under the oven broiler for 1–2 minutes, watching it closely.

6. Rest and Serve

Let the casserole rest for 5–10 minutes before serving. This gives the sauce a chance to settle and makes the spaghetti easier to scoop without immediately spreading across the plate.

Sprinkle with fresh parsley if desired and serve warm.

Recipe Tips

• Cook the spaghetti slightly under al dente. Fully cooked pasta can become soft after another 30-plus minutes in the oven.
• Use thick marinara sauce. A watery sauce can leave the finished casserole loose and wet.
• Don’t overcrowd the chicken skillet. Give the pieces room to brown instead of steaming. Cook in two batches if your skillet is small.
• Cut the chicken evenly. Similar-sized pieces finish cooking at roughly the same time.
• Watch the broiler carefully. Cheese can go from golden to burnt quickly under high heat.
• Let it rest before cutting or scooping. A short rest helps the sauce cling to the pasta instead of pooling at the bottom of the dish.

Chicken Breast vs. Chicken Thighs

Chicken breasts are a convenient choice because they cook quickly and have a mild flavor that works well with marinara and cheese. Chicken thighs are a little richer and more forgiving if they cook slightly longer.

Whichever you use, cut the chicken into similar-sized pieces and cook until the thickest piece reaches 165°F.

Variations and Substitutions

Use chicken thighs: Substitute boneless, skinless chicken thighs for the breasts. Trim excess fat and cut them into bite-size pieces.

Add vegetables: Sauté sliced mushrooms, diced bell pepper, spinach, or zucchini before combining the pasta and sauce. Keep added vegetables moderate so they don’t introduce too much moisture.

Make it spicy: Increase the red pepper flakes or add a pinch of crushed Calabrian-style chile if you have it.

Change the cheese: Provolone can replace part of the mozzarella for a slightly sharper, more Italian-American flavor.

Use another pasta: Penne, rigatoni, or rotini can work if you don’t have spaghetti. Cook the replacement pasta to al dente before assembling.

What to Serve With Chicken Parmesan Baked Spaghetti

Because this casserole is rich and filling, lighter sides work particularly well.

• Crisp green salad with a simple Italian-style dressing
• Roasted broccoli or asparagus
• Garlic bread or warm crusty bread
• Sautéed green beans
• Simple tomato and cucumber salad

Storage and Reheating

Refrigerator

Cool leftovers promptly and transfer them to an airtight container. Refrigerate for up to 3–4 days.

The pasta may absorb some of the sauce as it sits, so leftovers can be slightly firmer than the freshly baked casserole.

Freezer

For best texture, freeze individual portions in freezer-safe airtight containers for up to 2–3 months. Thaw overnight in the refrigerator before reheating when possible.

For make-ahead freezer preparation, assemble the casserole without baking, wrap it tightly, and freeze. Thaw completely in the refrigerator before baking.

Reheating

For an individual portion, microwave covered loosely for about 1–2 minutes, stirring or rotating halfway through as needed, until heated through.

For a larger portion, cover with foil and warm in a 350°F oven until hot throughout. Adding a small spoonful of marinara before reheating can help restore moisture.