EASY Cheesy Chicken Spaghetti Casserole Recipe

This chicken spaghetti casserole recipe is loaded with flavor. It combines spaghetti noodles, chicken, and veggies in a rich cream sauce, all covered in melty cheese. And the best part is this easy chicken spaghetti casserole can be made in just 3 simple steps!

The Best Chicken Spaghetti Casserole

There aren't many things better than an all-in-one casserole dish, and this chicken spaghetti casserole might be the best one ever!

I mean, the casserole is packed with tender spaghetti noodles, juicy chicken pieces, and veggies in a super rich, creamy, and cheesy sauce that is out of this world good. 

Sounds delicious, right?

Plus, in addition to tasting incredible, this baked chicken spaghetti recipe is a breeze to make too. You basically just cook the pasta, combine it with the rest of your ingredients, then transfer the whole thing to your casserole dish and bake it in the oven. That's seriously all there is to it!

By the way, since most of the time spent making this recipe is just letting the casserole bake in the oven, you'll have plenty of time to whip up a side. If you're looking for what to serve with chicken spaghetti, my favorite sides are these Texas Roadhouse rolls and these crack green beans.

Ingredients

Another reason this is the best chicken spaghetti recipe is it's made with simple ingredients. Honestly, you probably have most - if not all - of them on hand already!

Anyway, here's everything you'll need to make this cheesy chicken spaghetti recipe:

• 8oz. spaghetti noodles
• 2 cups cooked and diced chicken (or rotisserie chicken)
• ¼ cup chopped green bell pepper
• ¼ cup chopped celery
• 5oz. Rotel tomatoes with green chilies
• 10oz. can of condensed chicken soup
• 1 cup chicken stock
• 1 cup shredded cheddar cheese
• ½ cup diced Velveeta cheese

Not bad, eh?!

Oh, and you can use almost all of these same ingredients to make my other Texas chicken spaghetti recipe as well. It's another effortless and delicious chicken spaghetti recipe, so I highly recommend giving that a try next!

Or, for something a little different, you can use a few of these ingredients to make this chicken Philly cheesesteak.

Ingredient Substitutions And Suggestions

I think this Rotel chicken spaghetti recipe is perfect when it's made with everything listed above. However, there are plenty of swaps that you can make to make this recipe more convenient.

For instance, when it comes to the chicken, I usually use cooked leftover chicken breasts from the night before, or I'll grab a rotisserie chicken from the store. 

Now, if you don't have condensed chicken soup, then you could swap it for cream of mushroom soup or any condensed cream soup, and it'll still taste great. I've had to do this a few times, and the results have always been just as delicious.

As for the cheese mixture, if you don't have Velveeta cheese, then you can swap it for cream cheese and add in some extra sharp cheddar cheese instead, or just use a block of cheddar cheese instead.

Lastly, when it comes to adding ingredients, you can add things like diced tomatoes, diced bell peppers, green beans, a little garlic powder, or fresh garlic for some more flavor.

How To Make Chicken Spaghetti Casserole

From start to finish, this chicken spaghetti casserole recipe will take about one hour, though almost all of that time is spent letting the casserole bake in the oven. So this really makes the perfect dinner for busy weeknights when you don't want to spend a lot of time in the kitchen.

Anyway, let's stop wasting time and get cooking!

Step 1: Cook The Pasta

First things first, preheat your oven to 350°F (180ºC).

Then you'll want to break the spaghetti noodles into pieces and cook them according to the package instructions. For what it's worth, I like to cook the pasta al dente so it doesn't become mushy while baking, but you can cook it however you prefer.

Anyway, once the spaghetti noodles have finished cooking, you can drain the pasta and transfer it back to your pot.

Step 2: Assemble The Casserole

Now that the pasta is cooked, you can go ahead and add the cooked chicken, bell pepper, celery, Rotel tomatoes, condensed soup, chicken broth, and Velveeta cheese to the pot of noodles. Then you'll want to give all of these ingredients a good stir until it all thoroughly combines.

Step 3: Bake The Casserole

Once you've combined the casserole filling ingredients, you can transfer the mixture to a 9x11-inch baking dish or something similar in size.

Then you can top the whole thing with all of the shredded cheese and bake the casserole for 45 minutes, or until the cheese is bubbly and the filling is hot.

Lastly, you'll want to let the casserole cool for a few minutes, then you can slice it up and serve.

Enjoy!

How To Store Chicken Spaghetti Casserole

This recipe for chicken spaghetti casserole makes 4 servings, so it's perfect for a big family dinner.

Then if you happen to have any leftovers, you can store your leftover chicken spaghetti casserole by either covering the casserole dish in foil or a lid, or you can transfer the leftovers to an airtight container. Stored this way, your casserole should last for about 4 days in the refrigerator.

Now, if you want to store the casserole for even longer, you can put it in a freezer-safe bag - or airtight container - and freeze it for up to 2 months.

How To Reheat Chicken Spaghetti Casserole

Whenever you're ready to enjoy your leftover chicken spaghetti casserole, you have a couple of options to reheat it.

My favorite way is to use the oven, so put the leftovers back in a casserole dish and heat it back up in the oven at 350°F for about 10 minutes - or until the cheese melts and it's warmed through.

Alternatively, if you're only trying to reheat a single serving, then you can microwave the leftovers in 30-second intervals, stopping to stir between each, until it's fully reheated.

FAQs About This Chicken Spaghetti Casserole Recipe

What is chicken spaghetti made of?

Chicken spaghetti is made up of cooked shredded chicken, spaghetti noodles, Rotel tomatoes, and a rich cream sauce that is made from a combination of Velveeta cheese, chicken stock, and condensed chicken soup. 

What is the difference between chicken spaghetti and chicken tetrazzini?

The biggest difference between chicken spaghetti and chicken tetrazzini comes down to the sauce. Chicken spaghetti has a rich creamy sauce with diced tomatoes, while chicken tetrazzini has a creamy white wine sauce with mushrooms. 

Wrapping It Up

Well, that's how to make chicken spaghetti casserole!

This chicken spaghetti casserole is truly the ultimate comfort food, and I think it gets better each time I make it. It's just so creamy, cheesy, flavorful, and loaded with chicken and spaghetti in each bite.

My family has been obsessed with this cheesy chicken spaghetti casserole since I made it for the first time, and I have a feeling your family will love it too. 

Anyway, I hope you enjoy this chicken spaghetti casserole recipe as much as I/we do.

As always, if you give this recipe a try, be sure to leave a comment below and let us know how it went!

More Casserole Recipes

If you're looking for some more easy casserole recipes, we have a ton on the blog you can try next!

Here are some reader favorites:

• Rotisserie chicken casserole
• Chile relleno casserole
• Overnight egg casserole
• Cauliflower casserole
• Chicken and rice casserole
• Chicken mushroom casserole
• Meatball sub casserole
• Taco pasta bake

Oh, and make sure to check us out on YouTube, TikTok, and Instagram! We post new recipes on them every day.