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Home Recipes By Type Dinner

Cheesy Chicken Fajita Casserole

Chicken Fajita Casserole is a family-friendly meal made in just ONE dish! This is a terrific dinner idea that you can get on the table in under 40 minutes.
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By: Diana Last updated on May 15, 2021

This post may contain affiliate links. Please read my disclosure policy.

Chicken Fajita Casserole makes the perfect weeknight dinner when you’re short on time! This is a terrific dinner idea that you can get on the table in under 40 minutes, plus it’s made in just ONE dish.



Growing up, our family dinners were always a vibrant affair, filled with laughter, stories, and of course, a medley of delightful dishes. One of my absolute favorites was the Chicken Fajita Casserole, a recipe that has been passed down in my family. It brings the comfort of a home-cooked meal and the zest of Mexican cuisine, all in one dish. Now, I am thrilled to share this cherished recipe with you, so you can bring a burst of flavor and joy to your family dinners.

If you’re looking for an easy chicken dinner to make on a busy weeknight, then this cheesy chicken fajita casserole is the answer! It’s a 5-ingredient dinner, and all you have to do is prep the ingredients, throw them in a baking dish, and bake until everything is baked to perfection.

This chicken fajita casserole is loaded with juicy chicken, colorful bell peppers, fajita seasoning, and gooey cheese! It’s low-carb, and you can always reduce the amount of cheese used.

Once you’ve made this, try something new and add my Chicken Spaghetti Casserole to the menu plan too!

How to Make Chicken Fajita Casserole

The steps are quite simple, here’s what you’ll need to make this delicious dinner:

The Ingredients

Ingredients needed to make chicken fajita casserole
  • Chicken: Preferably skinless and boneless chicken breasts. You could also opt for thighs if that’s what you have on hand.
  • Bell peppers: Grab different colored ones if you can, it makes the dish colorful and fun.
  • Shredded cheese: Your choice here – Mexican blend, mozzarella, cheddar, or even fontina works great here.
  • Fajita seasoning: I always make my own homemade fajita seasoning as it’s healthier, cheaper, and so easy to make!
  • Onion: A yellow onion is perfect for this recipe.

Complete list of ingredients and amounts can be found in the recipe card below.

The instructions

Once you gather the ingredients, making this chicken casserole is a breeze! I like to use a baking dish, but you can also use a baking sheet if that’s what you have.

How to make Chicken Fajita Casserole - step by step
  1. To make the chicken fajita casserole, in the baking dish season the chicken breasts with fajita seasoning and oil. Make sure that the seasoning is well distributed (I like to use my hands).
  2. Top the chicken with sliced bell peppers, and onion. Sprinkle a little bit more seasoning and top with shredded cheese.
  3. In a preheated oven (at 400°F, 200°C), bake the chicken casserole uncovered for 25-30 minutes.
  4. To check if the chicken is cooked through and safe to eat, insert the thermometer in the center of the chicken, and the internal temperature of the chicken should read 165°F or 74°C.

Make-Ahead Tips

If you’re planning ahead, this casserole can be prepared in advance! Simply prepare it up to the baking step, cover it, and store it in the fridge. When you’re ready, just bake it as instructed – a real time-saver for busy days.

Chicken casserole in a white Staub baking dish

Tips and Variations

  • To cook this chicken casserole quicker, you can cube the chicken into smaller pieces and reduce the cooking time.
  • Feel free to leave out the cheese if you want a lighter version of this.
  • Swap out the cheese with a breadcrumb topping. Season panko breadcrumbs with garlic powder, paprika, salt, and pepper.
  • You can add cooked pasta to the casserole (cooked to al dente).
  • Reheat in the oven at 350°F (180°C) for 15-20 minutes, or in the microwave if that’s easier.
A close up of the fajita chicken casserole

What to Serve With

Turn this meal into a feast by serving it with some of these delicious sides:

  • Garlic butter pasta or plain pasta.
  • Plain rice or a fancier Mexican rice.
  • For a low-carb option, cauliflower rice pairs wonderfully.

Don’t forget some fresh sides to balance the meal! Quick pico de gallo, lime crema, and fresh guacamole are easy to whip up and add a burst of freshness to your meal.

Chicken breast with fajita bell peppers and cheese, served in a white plate

More Easy Chicken Dinners To Try

Teriyaki Chicken Stir Fry

Easy Chicken Scampi Recipe

Garlic Butter Chicken Tenders

Creamy Lemon Chicken

All Chicken Recipes

I would love to hear how this recipe turned out for you! Feel free to share your experiences in the comments below. And if you made any tweaks or added a special ingredient, do share that too! Your insights might just inspire someone else to try a new variation.

Did you make this? Be sure to leave a review below and tag me on Facebook, Instagram, or Pinterest!

Recipe
4.97 from 32 votes
(Click stars to rate!)

Chicken Fajita Casserole

Prep Time: 10 minutes mins
Cook Time: 30 minutes mins
Total Time: 40 minutes mins
Author: Diana
Print Rate Recipe
Chicken Fajita Casserole is a family-friendly meal made in just ONE dish! This is a terrific dinner idea that you can get on the table in under 40 minutes.
4 servings
Chicken Fajita Casserole is a family-friendly meal made in just ONE dish! This is a terrific dinner idea that you can get on the table in under 40 minutes.

Recipe Video

Equipment

  • Baking dish

Ingredients 

  • 1 ½ pounds (680 g) chicken breasts skinless and boneless
  • 2 tablespoons fajita seasoning
  • 1 tablespoon vegetable oil
  • 2 medium bell peppers cut into strips
  • 1 medium yellow onion sliced
  • 1 ½ cups shredded cheese
  • fresh chopped cilantro for garnish

Instructions 

  • Preheat oven to 400°F (200°C).
  • In the baking dish season the chicken breasts with fajita seasoning and oil. Make sure that the seasoning is well distributed (I like to use my hands).
  • Top the chicken with sliced bell peppers, and onion. Sprinkle a little bit more seasoning and top with shredded cheese.
  • Bake the chicken casserole in the oven uncovered for 25-30 minutes.
  • Serve immediately, garnished with fresh cilantro leaves if desired.

Notes:

  • To check if the chicken is cooked through and safe to eat, insert the thermometer in the center of the chicken, and the internal temperature of the chicken should read 165°F or 74°C.
  • Any melting cheese is fine for this recipe.
  • CALORIE REDUCTION: Leave out all the cheese, top with parmesan mixed with panko breadcrumbs, spray with oil, and bake.
  • To cook this chicken casserole quicker, you can cube the chicken into smaller pieces and reduce the cooking time.
  • You can add cooked pasta to the casserole (cooked to al dente).
  • Serve the chicken with garlic butter pasta, plain pasta, plain rice, Mexican rice, or cauliflower rice for a low-carb option.
  • Reheat in the oven at 350°F (175°C) for 15-20 minutes, or in the microwave if that’s easier.

Nutrition Information

Calories: 388kcal, Carbohydrates: 5g, Protein: 50g, Fat: 18g, Saturated Fat: 9g, Cholesterol: 153mg, Sodium: 483mg, Potassium: 851mg, Fiber: 1g, Sugar: 3g, Vitamin A: 2203IU, Vitamin C: 78mg, Calcium: 226mg, Iron: 1mg

This website provides approximate nutrition information for convenience and as a courtesy only. Nutrition data is gathered primarily from the USDA Food Composition Database, whenever available, or otherwise other online calculators.

© Little Sunny Kitchen

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  1. Mayda says

    Posted on 4/3/25 at 02:06

    5 stars
    I forgot to take a picture but this recipe is awesome, I used 2 boneless chicken breasts only ,1 package of taco seasoning (I had no fajita seasoning) it was delicious!, also cubed the chicken! Hubby says make this again anytime

    Reply
    • Little Sunny Kitchen says

      Posted on 4/3/25 at 23:49

      Thank you so much for trying my recipe and for the great feedback! I’m so happy that you and hubby loved it.

      Reply
  2. bcaley says

    Posted on 2/23/25 at 15:49

    Can you serve this in a wrap?

    Reply
    • Little Sunny Kitchen says

      Posted on 2/23/25 at 22:40

      I think that would be amazing! Enjoy!

      Reply
  3. MG says

    Posted on 1/11/25 at 01:17

    5 stars
    It was absolutely delicious. I’m wondering if there’s a way to keep it from having so much liquid in the dish tho.

    Reply
    • Little Sunny Kitchen says

      Posted on 1/11/25 at 19:39

      Any liquid in the dish will come from the chicken. As it cooks it releases moisture, and the amount will depend on how the meat was prepared and stored. You can try letting the chicken rest at room temperature for a bit, then drying it with paper towels before adding to the pan next time!

      Reply
  4. Wilma Bradley says

    Posted on 12/10/24 at 16:18

    5 stars
    How long does the chicken fajita cooked casserole last in the refrigerator ?

    Reply
    • Little Sunny Kitchen says

      Posted on 12/11/24 at 17:00

      In an airtight container, 3-4 days.

      Reply
Older Comments 1 2 3

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