This Chicken Spaghetti Lasagna Bake is the ultimate comfort food mashup — creamy, cheesy, loaded with tender chicken and spaghetti noodles, all baked together in one glorious casserole dish!
THE CHEESIEST, COZIEST CASSEROLE YOU’LL EVER MAKE
Okay, so here’s the thing — I could not decide between chicken spaghetti and lasagna one night, and honestly? I just made both at the same time. That’s how this recipe was born, and I am a happy camper that it was, because my family has been requesting it on repeat ever since. It hits every single note you want in a weeknight meal: creamy, cheesy, filling, and so incredibly satisfying.
I make this at least twice a month — sometimes more during the colder months when everyone just wants something warm and cozy on the table. It comes together faster than you’d think, and the best part is that it feeds a crowd beautifully. We’re talking a full 9×13 casserole dish that will easily serve six to eight people. Leftovers the next day? Even better. I’m not judging if you eat it straight from the fridge cold. I’ve been there.
For a complete meal, I love serving this alongside a simple green salad and some warm garlic bread. A side of roasted broccoli or steamed green beans keeps things nutritious and rounds out the plate perfectly. Boom — dinner is served!
“I made this for my family on a Sunday and there was not a single bite left. My pickiest eater went back for thirds! This is absolutely a keeper of a recipe and I will be making it again very soon. Thank you so much for sharing!”
– Melissa
Frequently Asked Questions
Can I use rotisserie chicken instead of cooking my own?
Absolutely! Rotisserie chicken is one of my favorite shortcuts for this recipe. Just shred about 3 cups of meat and you are good to go. It keeps the whole process super simple and cuts down on prep time significantly on those busy weeknights.
Can I make this ahead of time?
Yes, of course! You can fully assemble the casserole, cover it tightly with foil, and refrigerate it up to 24 hours before baking. When you’re ready, just pull it out of the fridge about 20 minutes before it goes in the oven and bake as directed. You may need to add 5 to 10 extra minutes to the bake time since it’s starting cold.
Can I freeze Chicken Spaghetti Lasagna Bake?
Absolutely! Assemble the casserole completely, wrap it tightly in plastic wrap and then foil, and freeze for up to 3 months. Thaw overnight in the refrigerator before baking. This makes it a fantastic option for meal prep or for gifting to a friend who needs a home-cooked meal.
How do I store leftovers?
Store any leftovers in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave with a splash of chicken broth or water to keep things creamy. The whole casserole can also be reheated covered in the oven at 325°F until warmed through.
Can I substitute the cream of chicken soup?
Yes! If you want to skip the canned soup, you can make a quick homemade white sauce with butter, flour, chicken broth, and a splash of cream — it works beautifully. You could also use cream of mushroom soup if that’s what you have on hand. Whatever you prefer works great here.
What kind of pasta works best?
I use regular spaghetti noodles broken into thirds, which gives you that classic chicken spaghetti feel inside a lasagna-style bake. Angel hair pasta or thin linguine also work well. Just make sure you cook the pasta just until al dente — slightly underdone — since it will continue cooking in the oven and you don’t want mushy noodles.
Can I add vegetables to this dish?
Absolutely! Diced bell peppers, mushrooms, spinach, or frozen peas are all fantastic additions. Just sauté any raw vegetables with the onion and garlic before combining everything. It’s a great way to sneak in extra nutrition for the family, especially for picky eaters who might not notice!
Ingredients Needed: (See Recipe Card Below for the Full Recipe)
- Spaghetti noodles — Broken into thirds before cooking. Angel hair or thin linguine can also work here.
- Cooked shredded chicken — Rotisserie chicken is a great shortcut, or cook and shred your own boneless, skinless chicken breasts or thighs.
- Cream of chicken soup — This is the base of that creamy, dreamy sauce. You can use a homemade version if you prefer.
- Sour cream — Adds a subtle tang and keeps the filling incredibly creamy. Full-fat works best.
- Chicken broth — Thins the sauce just enough and adds a ton of flavor throughout the whole dish.
- Yellow onion — Finely diced so it melts right into the sauce. White onion works just as well.
- Green bell pepper — Adds color and a gentle sweetness. Red bell pepper is a delicious swap.
- Garlic — Fresh minced garlic is always my go-to, but garlic powder works in a pinch.
- Butter — For sautéing the vegetables until soft and golden.
- Diced tomatoes with green chiles (Rotel) — Adds just a tiny kick and a lot of flavor. Use mild if you’re serving to little ones.
- Cream cheese — Softened and mixed in for an extra layer of richness and creaminess. Trust me on this one!
- Shredded cheddar cheese — For mixing into the filling AND piling on top. More is more when it comes to cheese.
- Shredded mozzarella cheese — That stretchy, gooey pull on top is everything. I use part-skim for a slightly lighter option.
- Italian seasoning — Adds that warm, herby backbone that ties the whole dish together.
- Garlic powder, onion powder, salt, and black pepper — Season as you go and keep tasting until it’s just right for your family.
- Fresh parsley — Optional but so pretty for garnish right before serving!
How to Make Chicken Spaghetti Lasagna Bake
Start by preheating your oven to 375°F and greasing a 9×13-inch baking dish with nonstick spray or a little butter. Then get a large pot of salted water boiling and cook your spaghetti noodles — broken into thirds — until just barely al dente, about 7 minutes. You want them slightly underdone since they’ll keep cooking in the oven. Drain them well and set aside.
While the pasta cooks, melt 2 tablespoons of butter in a large skillet over medium heat. Add your diced onion and green bell pepper and cook for about 5 minutes, stirring occasionally, until everything is soft and fragrant. Add in the minced garlic and cook for another 60 seconds — don’t let it burn! This little step builds so much flavor for the whole casserole.
Now it’s time to build that creamy filling. In a large mixing bowl, combine the cream of chicken soup, softened cream cheese, sour cream, chicken broth, drained Rotel, Italian seasoning, garlic powder, onion powder, salt, and pepper. Stir everything together until smooth and well combined. Add in the sautéed vegetables, shredded chicken, cooked spaghetti, and one cup of the shredded cheddar cheese. Fold it all together gently — you want everything coated in that gorgeous creamy sauce.
Pour the entire mixture into your prepared baking dish and spread it out evenly. Top generously with the remaining cheddar cheese and all of the shredded mozzarella. Cover the dish tightly with foil and bake at 375°F for 25 minutes. Then uncover and bake for another 15 to 20 minutes until the cheese on top is melted, bubbly, and just starting to turn golden at the edges. I like to let it sit for about 5 minutes before scooping so everything holds together nicely.
Sprinkle with freshly chopped parsley if you’d like a little pop of color, and get ready for everyone to absolutely crowd the table. This casserole is warm, creamy, cheesy, and completely irresistible — a true family favorite that will be on repeat all year long!
Pro Tips
- Don’t overcook the pasta. — Pull the spaghetti from the water when it’s just slightly underdone. It will fully cook and absorb all that creamy sauce in the oven, and you’ll end up with perfectly tender noodles instead of mushy ones.
- Soften the cream cheese first. — Let your cream cheese sit at room temperature for at least 30 minutes before mixing. This makes it so much easier to blend into the sauce smoothly without any lumps.
- Season in layers. — I season the pasta water, the sautéed vegetables, and the final sauce. Layering your seasoning throughout the cooking process makes a huge difference in the final flavor of the whole dish.
- Use freshly shredded cheese. — Pre-shredded cheese from the bag is convenient, but it contains anti-caking agents that can prevent it from melting as smoothly. Shredding your own cheddar and mozzarella off the block gives you that gorgeous, gooey melt on top every single time.
- Cover for the first bake, then uncover. — Covering the dish with foil for the first 25 minutes traps the steam and heats everything through evenly. Removing the foil for the last 15-20 minutes is what gives you that beautiful golden, bubbly cheese crust on top.
- Double the batch and freeze one. — This recipe doubles beautifully. Make two casseroles at the same time and freeze one for a future busy night. Your future self will absolutely thank you!
What to Serve with Chicken Spaghetti Lasagna Bake
This casserole is a complete meal on its own, but a couple of simple sides really round out the table and keep things nutritious and balanced for the whole family!
- Garlic Bread — My personal favorite! A warm, crusty loaf slathered in garlic butter is perfect for scooping up every last bit of that creamy sauce.
- Simple Green Salad — A crisp salad with romaine, cucumbers, and a light Italian dressing is a fresh, bright contrast to the richness of the casserole.
- Roasted Broccoli — Toss florets with olive oil, salt, and pepper and roast at 400°F for 20 minutes. Easy, nutritious, and so good.
- Steamed Green Beans — Super simple and ready in minutes. A squeeze of lemon on top keeps them fresh and light.
- Caesar Salad — Creamy Caesar dressing, crunchy croutons, and shaved Parmesan — a total crowd-pleaser alongside this bake.
- Roasted Asparagus — Another quick, budget friendly side that adds color and a ton of nutrition to the meal with very little effort.
No matter what you choose to serve alongside it, this Chicken Spaghetti Lasagna Bake is guaranteed to bring everyone back to the table for seconds — enjoy every bite!
Chicken Spaghetti Lasagna Bake
Ingredients
Method
- Preheat your oven to 375°F. Grease a 9x13-inch baking dish with nonstick cooking spray and set aside.
- Cook the spaghetti noodles in a large pot of salted boiling water for about 7 minutes, or until just barely al dente. Drain well and set aside.
- While the pasta cooks, melt the butter in a large skillet over medium heat. Add the diced onion and green bell pepper and cook for 5 minutes, stirring occasionally, until softened. Add the minced garlic and cook for 1 additional minute. Remove from heat.
- In a large mixing bowl, combine the cream of chicken soup, softened cream cheese, sour cream, chicken broth, drained Rotel, Italian seasoning, garlic powder, onion powder, salt, and pepper. Stir until smooth and well combined.
- Add the sautéed vegetables, shredded chicken, cooked spaghetti, and 1 cup of the shredded cheddar cheese to the bowl. Fold everything together gently until fully coated in the creamy sauce.
- Pour the mixture into the prepared baking dish and spread evenly. Top with the remaining ½ cup cheddar cheese and all of the shredded mozzarella cheese.
- Cover the dish tightly with aluminum foil and bake at 375°F for 25 minutes. Remove the foil and bake uncovered for an additional 15 to 20 minutes, until the cheese is melted, bubbly, and lightly golden on top.
- Remove from the oven and let rest for 5 minutes before serving. Garnish with fresh chopped parsley if desired and serve warm.
