The Best Chicken Fajita Casserole

This savory chicken fajita casserole is a super easy and delicious hassle-free main dish. You can easily make this tasty dish, and it is filled with cheese, peppers, and homemade fajita seasonings. If you are looking to bring a fun and nutritious dish to your dinner table, this fajita casserole is the best dish!

Chicken fajita casserole baked with cheese.

This low carb chicken fajita casserole recipe is so easy, and can be served with a dollop of sour cream on top paired with a green salad.

It is a keto, gluten-free, grain-free, and low-carb recipe. Moreover, if you feel it is difficult to go out to a restaurant along with your kids, you can easily choose this recipe for a perfect dinner rotation with Mexican food. 

It’s perfect for those busy weeknights because you can save leftovers for the next day or the following. The best part? It’s without a doubt a delicious dinner the whole family will love—even the picky eater of the bunch! All you need are several simple ingredients to get started!

A close-up to the cheesy and juicy chicken fajita casserole.

Chicken Fajita Casserole Shopping List

  • Cumin powder
  • Fresh cilantro 
  • Hot or sweet paprika
  • Chili powder
  • Oregano
  • Garlic powder
  • Olive oil
  • Salt
  • Boneless skinless chicken breasts
  • Large, colorful bell peppers
  • Medium onions
  • Olive oil
  • Shredded monterey jack cheese (choice of cheese optional)

*See exact measurements in the recipe card down below!

The Step by Step Recipe

Preheat the oven to 375°F (190°C) and grease a baking dish with olive oil. In a small bowl mix together paprika, cumin, oregano, chili powder, garlic, salt and pepper. Reserve 1/2 tablespoon of the mixture.

Place chicken breast on a large plate and sprinkle with the spices. Add 1 tablespoon of oil and massage the meat to coat it evenly. Arrange the chicken into the baking dish.

The chicken breasts seasoned with fajita seasoning on a baking dish.

Add on top of the chicken breast, onions and bell peppers, sprinkle with the tablespoon of spice mixture you reserved before and drizzle with olive oil. Mix carefully.

Peppers and onions on top of the chicken breasts.

Bake uncovered for about 30 minutes or until chicken has cooked through. Remove the dish from the oven and turn on the broiler.

Add the cheese on top of the dish and return to the oven. Broil until the cheese is bubbly and just beginning to toast (about 5 minutes).

The dish topped with cheese.

Tips for Best Fajitas

  • Make Homemade Seasoning: If you want to add flavor to your food, you must try our simple and delicious fajita seasoning. It only takes a few minutes for preparation and provides a well worthy taste as well. When you learn the ways to make homemade fajita seasoning, you will never crave a store-bought one.
  • Add more protein: You can easily prepare chicken fajita casserole for meat lovers. All you have to do is add some ham, bacon, sliced sausage, or pepperoni.
  • For fast cooking: If you love chunkier chicken casserole, you can cut chicken breasts into strips. It will also speed up the cooking time.
A close-up of the cheesy and bubbling topping and the juicy chicken.

Serving Suggestions

One of the best things about this delicious chicken fajita casserole is it is an easy-to-serve and versatile recipe. Here are some great options we think you might like too:

  • Beans: A great way to pair this dish is with refried beans or black beans. Moreover, green beans also give a delicious taste with it, and slow-cooked green beans are the most favorite with this delicious fajita casserole.
  • Rice: Try our easy Mexican arroz rojo, white rice or also green rice for serving on the side, this is my fave way of pairing this recipe!
  • Salsas: Spice it up with our guacamole salsa, molcajete salsa or, if you really into spicy, try this amazing Mexican chili oil.
  • Tortillas: Make casserole into burritos, quesadillas, and tacos with corn tortillas or sourdough flour tortillas, check out our video below for homemade tortillas!
  • Toppings: Top or pair with a side of sour cream, green onions, or jalapenos to take your serving to the next level! Add hot sauce on the side for an extra punch of flavor! You can even sprinkle a little extra cheese on top. Can you ever have too much cheese?!

How to Reheat and Store

You can easily store your leftover chicken fajitas casserole in the refrigerator. For best results, keep leftovers in an airtight container for up to three days. Or place it in a bag and freeze for up to 2 months. Reheat the leftovers on the microwave at high for 2 minutes. This is the perfect meal-prep chicken dinner dish—so store properly and enjoy later too!

Keto Chicken Fajita Casserole

This recipe is best for a quick meal as well as a perfect dish to switch things up. One of the basic things to consider about the chicken fajita casserole recipe is that you can easily serve it as a keto dish. So if you want to try some Mexican food but in a keto style, you can go with this chicken fajita casserole. Pair it with your favorite cauliflower rice side dish or try out this recipe for sautéed Italian-style mushrooms.

What do you think about this fajita chicken casserole? What is the perfect side dish you’d pair with it? Let me know in the comments below! I’d love to hear what you think! Also, if you make this recipe, tag me over on Instagram so I can see how it turned out!

Chicken Fajita Casserole With Cheese

Chicken Fajita Casserole

author Maricruz
4
This chicken fajita casserole is a super easy and delicious main dish. You can easily make this tasty dish with cheese, peppers, and homemade fajita seasonings.
prep 10 minutes
cook 35 minutes
total 45 minutes

Ingredients 

For fajita seasoning

  • 1 tsp cumin powder
  • 1 tsp cilantro (finely chopped)
  • 1 Tbsp hot or sweet paprika
  • 2 tsp chili powder
  • 1 Tbsp oregano
  • 1 tsp garlic powder
  • 1 Tbsp olive oil
  • 1 tsp salt

For the casserole

  • 2 large chicken breasts split lenghtwise
  • 2 large bell peppers (seeded and cut into strips)
  • 1 medium onion (finely sliced)
  • olive oil
  • 1 ½ cup shredded Monterey Jack cheese (or mozzarella, Pepperjack, Oaxaca, Cheddar)

Instructions
 

  • Preheat the oven to 375°F (190°C) and grease a baking dish with olive oil.
  • In a small bowl mix together paprika, cumin, oregano, chili powder, garlic, salt and pepper. Reserve ½ tablespoon of the mixture.
  • Place chicken breast on a large plate and sprinkle with the spices. Add 1 tablespoon of oil and massage the meat to coat it evenly. Arrange the chicken into the baking dish.
  • Add on top of the chicken breast onions and bell peppers, sprinkle with the seasoning mixture you reserved before and drizzle with olive oil. Mix carefully.
  • Bake uncovered for about 30 minutes or until chicken have cooked through. Remove the dish from oven and turn on the broiler.
  • Add the cheese on top of the dish and return to oven. Broil until the cheese is bubbly and just beginning to toast. (about 5 minutes).

Notes

  • Make Homemade Seasoning: If you want to add flavor to your food, you must have to try our simple and delicious fajita seasoning. It only took few minutes for preparing and provides a well worthy taste as well. When you learn the ways to the homemade fajita seasoning, you will never crave a store-bought one.
  • Add more protein: You can easily prepare chicken fajita casserole for meat lovers. All you have to do is add some ham, bacon, sliced sausage, or pepperoni.
  • For fast cooking: If you love chunkier chicken casserole, you can cut chicken breasts into strips. It will also speed up the cooking time.
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