Easy Chicken Spaghetti Casserole Recipe

Chicken Spaghetti Casserole - easy-chicken-spaghetti-casserole-recipe-2

This chicken spaghetti casserole is the kind of dish that earns a permanent spot in your weeknight rotation without any fanfare or fuss. It pulls together pantry staples and simple prep work into a bubbling, cheesy baked pasta dinner that genuinely satisfies. If you are looking for a reliable, crowd-pleasing meal that does not ask much of you on a busy evening, this is it.

Why You’ll Love This Recipe

This is a true easy chicken spaghetti recipe in every sense — no complicated techniques, no hard-to-find ingredients, and no lengthy prep time standing between you and dinner. The ingredient list is short, and most of it is probably already in your kitchen right now.

The combination of cream of mushroom soup, Rotel tomatoes, and chicken broth creates a sauce that is rich and creamy without requiring you to make anything from scratch. It coats every strand of spaghetti and pulls the whole dish together in a way that feels like much more effort than it actually was. Check out our related guide for more tips.

This is also a make ahead chicken casserole that holds up beautifully. You can assemble it a day in advance, refrigerate it, and bake it when you are ready. That flexibility alone makes it one of the most practical easy family dinner ideas you can keep in your back pocket.

The cheddar cheese on top bakes into a golden, slightly crisp layer that gives way to the creamy filling underneath. It is the kind of comfort food pasta dinner that people go back for seconds of without needing to think about it.

What Makes This Chicken Spaghetti Casserole Work

A lot of baked pasta dishes end up dry or gummy, and the reason is almost always the same — either not enough liquid or pasta that was overcooked before it ever went into the oven. This recipe avoids both problems with a couple of straightforward choices.

Cook the Spaghetti to Al Dente Only

The single most important thing you can do for this dish is to pull the spaghetti out of the water while it still has a little bite to it. It will continue cooking in the oven for 25 to 30 minutes, and if it goes in already fully cooked, it will come out soft and mushy.

Al dente pasta absorbs the sauce during baking without losing its structure. The result is a creamy chicken spaghetti bake where the pasta holds its shape and the sauce clings to it rather than pooling at the bottom of the dish.

The Sauce Comes Together in One Pan

After sautéing the diced onion and minced garlic until soft, you stir in the cream of mushroom soup, Rotel tomatoes, chicken broth, salt, and pepper right in the same pan. This is your sauce, and it requires no whisking, no roux, and no babysitting.

The Rotel tomatoes bring a subtle heat and acidity that cuts through the richness of the soup. That balance is what keeps this chicken spaghetti with Rotel from tasting heavy or one-dimensional — the tomatoes do real work here.

The cup of chicken broth loosens the soup into a pourable, cohesive sauce that will distribute evenly once you add the pasta and chicken. Without it, the mixture would be too thick to coat everything properly before baking.

Shredded Chicken Is the Right Call

This recipe calls for three cups of cooked, shredded chicken, and that texture matters. Shredded chicken weaves into the spaghetti and distributes throughout the casserole so you get chicken in every bite rather than isolated chunks.

Rotisserie chicken is one of the easiest sources here — it is already cooked, already seasoned, and shreds in minutes. Leftover baked or poached chicken works just as well. This shredded chicken spaghetti recipe is also a smart way to use up chicken you already have on hand.

Two-Stage Cheese for the Best Texture

One cup of shredded cheddar goes into the filling before the casserole is assembled. The other cup goes on top. This two-stage approach is what separates a good cheesy chicken pasta bake from a great one.

The cheese mixed into the filling melts completely into the sauce, adding body and a deeper savory flavor throughout. The cheese on top browns in the oven and creates that golden, slightly crisp crust that makes the finished dish look as good as it tastes.

Ingredient Breakdown

The Pasta

Twelve ounces of spaghetti is the right amount for this recipe — enough to fill a standard baking dish without crowding it. Cook it in well-salted water and drain it as soon as it reaches al dente. Do not rinse it; the surface starch helps the sauce adhere.

The Soup

One can of cream of mushroom soup is the backbone of the sauce in this chicken spaghetti casserole with cream of mushroom soup. It provides creaminess, body, and a savory depth that would take much longer to build from scratch. Use it straight from the can — no need to dilute it separately since the broth takes care of that.

The Rotel

Rotel is a canned blend of diced tomatoes and green chiles, and it is a classic ingredient in Southern chicken spaghetti casserole for good reason. It adds brightness and a gentle kick that you would miss if you swapped it for plain diced tomatoes. Use the original variety unless you want to dial the heat up or down.

The Cheese

Two cups of shredded cheddar, divided, is all you need. Sharp cheddar will give you more pronounced flavor, while mild cheddar will melt a little more smoothly. Either works well in this baked chicken pasta casserole.

How to Make Chicken Spaghetti Casserole

  • Preheat your oven to 350°F and grease a baking dish.
  • Cook the spaghetti in salted water until just al dente, then drain.
  • Sauté the diced onion and minced garlic in a pan over medium heat until soft and translucent.
  • Stir in the cream of mushroom soup, Rotel tomatoes, chicken broth, salt, and pepper. Mix until combined.
  • Add the shredded chicken and cooked spaghetti to the sauce and stir to coat everything evenly.
  • Mix in one cup of the shredded cheddar cheese.
  • Pour the mixture into the greased baking dish and spread it into an even layer.
  • Sprinkle the remaining cup of cheddar cheese over the top.
  • Bake for 25 to 30 minutes, until the casserole is bubbly and the cheese on top is golden.

The Resting Step You Should Not Skip

Once the casserole comes out of the oven, let it rest for 10 minutes before you serve it. This is not a suggestion to fill time — it genuinely changes the texture of the finished dish.

During those 10 minutes, the sauce tightens slightly and the pasta absorbs any remaining liquid. What comes out of the oven bubbling and loose will set into a creamy, cohesive casserole that holds together when you scoop it. Cut into it too soon and everything runs together on the plate.

This resting period is especially important if you are serving this as a simple chicken spaghetti for a crowd — it makes portioning much cleaner and keeps the presentation looking intentional rather than sloppy.

Make It Ahead

This oven baked chicken spaghetti is an ideal candidate for advance prep. Assemble the entire casserole up through step 8, cover it tightly with foil, and refrigerate it for up to 24 hours before baking.

When you are ready to cook it, let it sit at room temperature for about 20 minutes before it goes into the oven. This takes the chill off and helps it heat through evenly. You may need to add 5 to 10 minutes to the bake time if it is going in cold.

If you enjoy easy, satisfying dinners like this one, you might also want to try Crock Pot Chicken and Stuffing for another hands-off weeknight option, or Old-Fashioned Chicken and Dumplings when you are in the mood for something equally comforting. For a completely different direction on a busy night, Beef and Cheese Enchiladas are another reliable crowd-pleaser worth bookmarking.

For more on the science of why pasta continues cooking in the oven and how to prevent overcooking in baked pasta dishes, Serious Eats has a thorough breakdown that is worth a read. The Food Network’s guide to cooking pasta al dente is also a helpful reference if you want to nail that texture every time.

Ingredients

  • 12 oz spaghetti
  • 3 cups cooked chicken, shredded
  • 1 can cream of mushroom soup
  • 1 can Rotel tomatoes
  • 2 cups shredded cheddar cheese, divided
  • 1 cup chicken broth
  • 1 small onion, diced
  • 2 garlic cloves, minced
  • Salt and pepper to taste

Instructions

  • Preheat oven to 350°F. Grease a baking dish and set aside.
  • Cook spaghetti in salted boiling water until just al dente. Drain and set aside.
  • In a large skillet or saucepan, sauté the diced onion and minced garlic over medium heat until soft.
  • Stir in the cream of mushroom soup, Rotel tomatoes, chicken broth, salt, and pepper. Stir until the sauce is smooth and combined.
  • Add the shredded chicken and cooked spaghetti to the sauce. Toss until everything is evenly coated.
  • Mix in 1 cup of the shredded cheddar cheese.
  • Pour the mixture into the prepared baking dish and spread into an even layer.
  • Top with the remaining 1 cup of cheddar cheese.
  • Bake for 25 to 30 minutes, until the casserole is bubbly and the cheese is golden on top.
  • Let the casserole rest for 10 minutes before serving for the creamiest texture.
Easy Chicken Spaghetti Casserole Recipe - Easy Chicken Spaghetti Casserole Recipe
Easy Chicken Spaghetti Casserole Recipe recipe and cooking guide
Easy Chicken Spaghetti Casserole
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Easy Chicken Spaghetti Casserole

Recipe by Cookfosters
5 from 1 vote
Course: Dinner Cuisine: American Difficulty: Easy
🍽️
Servings
6
⏱️
Prep Time
15 min
🍳
Cook Time
30 min
🔥
Calories

A bubbling, cheesy baked pasta dinner that pulls together pantry staples into a crowd-pleasing weeknight meal. Cream of mushroom soup, Rotel tomatoes, shredded chicken, and spaghetti come together in one comforting casserole topped with golden cheddar cheese.

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Ingredients

  • 12 oz spaghetti
  • 3 cups cooked shredded chicken (rotisserie or leftover)
  • 1 can cream of mushroom soup
  • 1 can Rotel diced tomatoes with green chiles (original variety)
  • 1 cup chicken broth
  • 1 medium onion, diced
  • 2 cloves garlic, minced
  • 2 cups shredded cheddar cheese, divided
  • Salt, to taste
  • Pepper, to taste

Directions

1.

Preheat your oven to 350°F and grease a baking dish.

2.

Cook the spaghetti in well-salted water until just al dente, then drain. Do not rinse.

3.

Sauté the diced onion and minced garlic in a pan over medium heat until soft and translucent.

4.

Stir in the cream of mushroom soup, Rotel tomatoes, chicken broth, salt, and pepper. Mix until combined.

5.

Add the shredded chicken and cooked spaghetti to the sauce and stir to coat everything evenly.

6.

Mix in one cup of the shredded cheddar cheese.

7.

Pour the mixture into the greased baking dish and spread it into an even layer.

8.

Sprinkle the remaining cup of cheddar cheese over the top.

9.

Bake for 25 to 30 minutes, until the casserole is bubbly and the cheese on top is golden.

10.

Let the casserole rest for 10 minutes before serving to allow the sauce to tighten and the pasta to absorb remaining liquid.

Recipe Reviews

  • Cookfosters★★★★★

    Excellent recipe!

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