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Home Recipe Index Casseroles

Chicken Fajita Casserole

4.8 /5
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Polly Conner
By: Polly ConnerPosted: 4/4/23Updated: 3/1/25

This post may contain affiliate or sponsored links. Please read our disclosure policy.

Chicken Fajita Casserole is a delicious and easy-to-make Tex-Mex inspired dish that combines the flavors of tender chicken, sautéed veggies, salsa, and spices. The filling is wrapped in a warm tortilla and then baked under a blanket of cheese until melted and bubbly. It’s a satisfying, freezer-friendly meal that’s perfect for busy weeknights or casual gatherings.

Chicken fajita casserole served on a plate with salsa and avocado on top. this …


 
Table of Contents
  • About This Recipe
  • Ingredients Needed
  • Time-Saving Tip
  • Step-by-Step Instructions
  • Tip: Freeze Leftover Tortillas
  • Side Dish Ideas
  • Make It a Freezer Meal
  • FAQs
  • 25+ Amazing Mexican Recipes
  • More Chicken Casseroles to Try
  • Chicken Fajita Casserole

About This Recipe

Confession: Rachel and I had the hardest time figuring out what to call this recipe.

Chicken and Veggie Burritos? Baked Enchiladas? Chicken and Veggie Enchiladas? Chicken Fajitas?

We just couldn’t quite capture what these were, because they are a wonderful combination of all things Tex-Mex.

We ended up landing on Chicken Fajita Casserole. It’s been a long-time family favorite. In fact, the night before my husband’s knee surgery, I told him I’d make any dinner he wanted. His request? You’re reading about it right now.

Ingredients Needed

Here’s what you need.

Chicken fajita casserole ingredients measured out and labeled.

Ingredient Notes

  • Boneless, skinless chicken breasts – Here is how I get these delivered to my doorstep.
  • Corn – Canned corn that’s been drained or 5-6 ears of roasted corn.
  • Salsa – Your choice of heat level.
  • Taco seasoning – Try our homemade taco seasoning.
  • Shredded cheese – Mozzarella, cheddar, or Monterey Jack are good choices.
  • Optional toppings: Guacamole or avocado chunks, salsa, sour cream, diced red onion, and cilantro.

Time-Saving Tip

Use leftover chicken for the filling. If you have leftover roasted chicken or even a rotisserie chicken, you can just use those leftovers instead of cooking up your own.

Step-by-Step Instructions

We always aim to strike a balance between making recipes super easy and super delicious at the same time. Here is how this one comes together in a flash but still packs some serious flavor!

Sauté the Diced Veggies and Chicken

To start making the filling, you will sauté your diced veggies and then the chicken.

Diced veggies sauteing in a skillet for chicken fajita casserole.
Diced chicken cooking in a skillet for chicken fajita casserole.

Make the Filling & Assemble

Stir together the cooked veggies, chicken, corn, salsa, and taco seasoning until well combined. 

To each tortilla, add 2 tablespoons of cheese and a generous half cup of the chicken mixture into each one. Roll each one up and place them side by side in the baking dish seam side down. 

Sautéing veggies and chicken in a skillet for chicken fajita casserole.
Filling and cheese on a tortilla to roll and make chicken fajita casserole.

Bake the Fajita Casserole

After sprinkling a generous layer of cheese over the assembled fajitas, pop them in the oven and bake.

uncooked chicken fajita casserole with cheese on top
Cooked chicken fajita casserole in a large dish

Tip: Freeze Leftover Tortillas

If you have leftover tortillas, did you know you can freeze them? Here is the best way to freeze tortillas for later.

Side Dish Ideas

Avocado salsa in a white bowl with chips surrounding it.

Avocado Salsa

Fiesta salad in a white bowl with serving spoons.

Fiesta Salad

Homemade guacamole in a bowl with blue corn chips around it.

Chips and Guacamole

Mexican chopped salad in a white bowl.

Mexican Chopped Salad

See all side dishes

Make It a Freezer Meal

You’ve come to the right place if you’re looking for make-ahead freezer meals.

Not only have we written two freezer meal cookbooks, but we also have some amazing 1 Hour Freezer Prep Plans that walk you through how to make 6 meals in one hour.

Here’s how to make this casserole into a freezer meal that will taste like a fresh meal…

Freeze Casserole For Later: Follow Steps 1-6 (skip the preheating step). Cover the casserole dish tightly in a few layers of plastic wrap or foil, squeezing out any excess air. Label and freeze.

Prepare From Frozen: Thaw in the fridge for 24-48 hours. Follow Steps 7-8.

A 9x12 baking dish covered in foil and labeled chicken fajita casserole.

FAQs

Is this casserole spicy?

It really depends on the amount and type of spices and salsa used. However, you can easily adjust the level of spiciness to your preference. The tortilla and cheese really mellow out some of the spicy factor, so overall I wouldn’t consider this a spicy recipe.

Can I make it ahead of time?

Yes, you can assemble the casserole ahead of time and refrigerate it until ready to bake. Alternatively, you can freeze it before baking. More freezer meal instructions below.

Can I use a different meat?

While I haven’t personally tried anything besides chicken breast, I see no reason why beef or ground chicken wouldn’t work. We use the same concept in our Chicken and Steak Fajitas recipe so I know the Mexican flavors play nice with both types.

Collage of Mexican dishes.

25+ Amazing Mexican Recipes

Looking for more easy, mouthwatering Mexican recipes? Be sure to browse through our round-up of 25+ Amazing Mexican Recipes!

More Chicken Casseroles to Try

If you like this casserole, you’re sure to love some of these other favorite chicken casseroles:

  • Cheesy Chicken and Rice Casserole
  • Chicken Parmesan Casserole
  • Chicken and Stuffing Casserole (or Turkey Stuffing Casserole)
  • Chicken Spaghetti
  • Cheesy Chicken Enchiladas
  • Chicken and Broccoli Alfredo Bake

Did you make this? Snap a photo and tag us on Instagram at @thrivinghome so we can see your creations and cheer you on!

Chicken fajita casserole out of the oven with salsa, and diced avocado lined down the middle of the pan.
5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.8 from 4 reviews

Chicken Fajita Casserole

One of my favorite, family-friendly dinners: Chicken Fajita Casserole is freezer-friendly and delicious.

Yield: 8 servings 1x
Prep: 20 minutesCook: 15 minutesTotal: 35 minutes
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Ingredients

  • 2 tablespoon olive or avocado oil, divided
  • 1 1/2 pounds boneless, skinless chicken breasts, diced
  • 1/2 onion, diced
  • 1 green bell pepper, diced
  • 1 red bell pepper, diced
  • 2 garlic cloves, minced
  • 1 can of corn, drained (or 5–6 ears of roasted corn)
  • 1/2 cup salsa (your choice of heat level)
  • 2–3 tablespoons taco seasoning (or try our homemade taco seasoning)*
  • 1 1/2 cups shredded cheese (mozzarella, cheddar, or Monterey Jack are good choices)
  • 8 (8-inch, taco-sized) tortillas
  • Optional toppings: guacamole or avocado chunks, salsa, sour cream, diced red onion, and cilantro

*Original recipe was 1 tablespoon taco seasoning, but we think it needs more.

Before You Begin! If you make this, please leave a review and rating letting us know how you liked this recipe! This helps our business thrive & continue providing free recipes.

Instructions

Make It Now:

  1. Preheat oven to 400° F. Coat a 9×12 casserole dish with cooking spray.
  2. Heat 1 tablespoon oil in a large skillet over medium-high heat. Add in the chicken and saute for 4-6 minutes or until done (no pink inside). Remove to a plate and wipe out the pan if needed. 
  3. Add 1 tablespoon oil and let it get hot. Saute the onion and peppers for 4-6 minutes, until soft. Stir in the garlic and cook another 30-60 seconds. Remove from the heat.
  4. Stir in the cooked chicken, corn, salsa, and taco seasoning until well combined. 
  5. To each tortilla, add 2 tablespoons of cheese and a generous half cup of the chicken mixture to each one. Roll each one up and place them side by side in the baking dish seam side down. 
  6. Spread the remaining cheese over the top of the fajitas. (Freezing instructions begin here.)
  7. Bake for 15-20 minutes or until cheese is melted.
  8. Serving suggestion: Top with salsa, sour cream, or plain Greek yogurt, and/or guacamole.

Freeze For Later: Follow Steps 1-6 (skip the preheating step). Cover the casserole dish tightly in a few layers of plastic wrap or foil, squeezing out any excess air. Label and freeze.

Prepare From Frozen: Thaw in the fridge for 24-48 hours. Follow Steps 7-8.


Notes/Tips

  • Shortcut: Use already cooked chicken, like from a rotisserie chicken.
  • We get our meat from ButcherBox. The chicken is organic and curated from small, trusted farms. We highly recommend this service to source DELICIOUS and HEALTHY meat—like uncured bacon, grass-fed beef, and wild salmon—and have used it for years ourselves.
© Author: Polly Conner
Cuisine: Mexican Method: Baking

Did you make this?

Snap a photo and tag us on Instagram at @thrivinghome so we can see your creations and cheer you on!

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A serving of chicken fajita casserole on a plate with avocado chunks and salsa on top.
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Polly Conner

Polly Conner

As co-founder of Thriving Home, Polly’s passionate about helping busy parents get dinner on the table. With a house full of kids, dogs, and (usually) a DIY project in the works, she knows firsthand how every minute (and every dollar) counts. As a business owner, she enjoys wearing multiple hats and serves best as a project manager for Thriving Home.

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  1. Debra Bailey says

    Posted on 1/27/24 at 8:05 pm

    Great. The filling made about 6 cups. I divided into 2 meals and put 1/4 c in a mini tortilla. Made 12. I used more cheese and would add a squeeze of lime juice next time. Great, easy, and delicious!

    Reply
    • Carla from Thriving HomeCarla from Thriving Home says

      Posted on 1/27/24 at 8:10 pm

      So glad you enjoyed it Debra. Thanks for the detailed review!

      Reply
  2. LW says

    Posted on 1/19/24 at 7:10 am

    Quick and easy! I accidentally put in 2c of salsa but it didn’t affect it at all. I pressure cooked 2 chicken breasts instead and it made a lot of filling! It seemed like something else was needed on top, visually, but with the added toppings it was quite good. Thank you!

    Reply
    • Carla from Thriving HomeCarla from Thriving Home says

      Posted on 1/21/24 at 6:05 pm

      Glad you liked it and the accidental amount didn’t cause any issues! I’m a big fan of recipes that can handle some mistakes. 🙂 Thanks for leaving a review.

      Reply
  3. Tricia says

    Posted on 4/12/23 at 11:55 am

    Had to make this one as soon as it came out! So easy to prep during a nap (what I did) then threw in the oven a few hours later. This is so yummy and was easily made DF. I ended up using some DF shredded cheese I had leftover, but next time will add some cream cheese to the chicken mixture and see how it turns out. Also love a one pan clean up!

    Reply
    • Carla from Thriving HomeCarla from Thriving Home says

      Posted on 4/13/23 at 11:39 am

      Superfan award Tricia! So glad it turned out well. Let us know how it turns out when you make it again with the DF cream cheese. Thank you for your continued support and for taking the time to leave reviews!

      Reply
  4. Ami says

    Posted on 6/5/22 at 9:36 am

    I made these ahead and froze them for when I was short on time and needed dinner quickly. They turned out deeeelcious! Absolutely loved them, and everyone in my house did too. This is now my go-to backup dinner that I always make in my freezer.

    Reply
    • Rachel Tiemeyer says

      Posted on 6/6/22 at 10:41 am

      Love, love, love this! Thanks, Ami.

      Reply
    • Rachel Tiemeyer says

      Posted on 6/6/22 at 11:13 am

      Such a great freezer meal option. That’s awesome that your fam liked them. Thanks for the feedback!

      Reply
  5. Carol says

    Posted on 3/31/16 at 7:06 pm

    Delicious, we didn’t have corn, put in black beans. My 6 year old grandson liked them!!

    Reply

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A serving of chicken fajita casserole on a plate with avocado chunks and salsa on top.