Chicken Fajita Casserole Recipe

This chicken fajita casserole recipe is so, so good. It combines juicy chicken breasts, bell peppers, onions, fajita seasoning, cream cheese, and more to create an unforgettable meal. Plus, it's super easy to make! 

The Best Chicken Fajita Casserole

If you like chicken fajitas, just wait until you give this fajita chicken casserole a try! It brings all the incredible flavors of traditional fajitas but layers them into one casserole dish.

This chicken fajita bake has flavorful chicken and fajita seasoning, some richness from the cream cheese and shredded cheese, and crispy bell peppers and onions. This easy chicken casserole recipe is definitely a contender for one of the best casserole recipes I've ever made!

Every delicious main dish needs some equally delish sides to go with it. So, if you're looking for a couple, you really can't go wrong by making either these air fryer tortilla chips with this Chipotle guac or even these Texas Roadhouse rolls.

Why This Recipe Works

It's easy to make. All you have to do is cook the peppers and onions, mix all of the ingredients together, then transfer everything to a casserole dish and let the oven take it from there. 

A winning combination. From the seasoned chicken and veggies to the creamy filling and melty cheese on top, you just can't be this recipe!

An instant family favorite. This recipe is always a hit with kids and adults. It's delicious as is, easy to customize, and will leave everyone satisfied.

Ingredients

This chicken fajita bake is made with pretty much all of the same ingredients you'd use in regular chicken fajitas, minus the tortillas, of course.

Anyway, here's what you'll need to make this easy chicken fajita casserole:

• 1 lb. cooked chicken (shredded rotisserie chicken)
• 1 tbsp. olive oil
• 1 small green bell pepper, sliced into thin strips
• 1 small  yellow bell pepper, sliced into thin strips
• 1 small red bell pepper, sliced into thin strips
• 1 small onion, thinly sliced
• 8 oz. cream cheese, softened
• 8 oz. cheddar cheese, shredded 
• 1 ½ tbsp. fajita seasoning mix
• salt and pepper
• Fresh cilantro for garnish

By the way, if you have any leftover ingredients, you can use almost all of them in this sheet pan chicken fajita crunch wrap and teriyaki chicken casserole. So definitely give those a shot next!

How To Make Chicken Fajita Casserole

1. Prep work: Preheat the oven to 350°F (180ºC). Lightly grease a 9×13 baking dish with cooking spray and set it aside. 

2. Cook the veggies: Heat olive oil in a skillet set over medium-high heat. Add the strips of peppers and onions and sprinkle with salt. Cook for about 4 to 5 minutes until tender, stirring frequently.

3. Add the chicken: Remove the skillet from the heat and add to the cooked chicken. Mix it with the onions and peppers, then transfer the chicken mixture to the prepared baking dish.

4. Make the filling: In a large bowl, combine the cream cheese, half of the shredded cheese, fajita seasoning mix, salt, and pepper. Mix until thoroughly combined.

5. Bake the casserole: Add cream cheese mixture to the casserole dish with the chicken and peppers. Sprinkle it with the remaining cheddar cheese and bake for 25 to 30 minutes or until the cheese is hot and bubbly. Remove from the oven and serve with chopped cilantro on top. Enjoy!

Tips To Make The Best Recipe

• Make a homemade fajita seasoning to add any flavor you want to the casserole.
• Swap the fajita seasoning for any taco seasoning for a just as delicious flavor.
• Use leftover rotisserie chicken or any leftover chicken breasts to save time.
• Add cooked brown rice, white rice, jasmine rice, or cauliflower rice for more substance.
• Swap the cheddar with pepper jack cheese for a little more spice.
• Serve the casserole topped with crushed tortilla chips for an added crunch.

How To Store Chicken Fajita Casserole

In the fridge: Put a lid on the casserole dish and store it in the fridge as is, or you can store your chicken fajita casserole in an airtight container, and it'll stay good for up to 4 days.

In the freezer: To store your leftover casserole for even longer, you can transfer it to a freezer-safe container or freezer-safe bag and freezer for up to 4 months.  

Reheating: Put the leftovers back in a casserole dish and warm it in the oven at 350°F for about 10 minutes or until it's fully heated. Add more time for the frozen casserole or let it thaw in the fridge overnight first.

FAQS About This Chicken Fajita Casserole Recipe

Are chicken fajitas healthy?

Since the main portion of the meal is lean protein from the chicken and vegetables, chicken fajitas are pretty healthy. They're even healthier if you skip the tortilla shells and have them in this casserole form instead.

What is in a homemade fajita seasoning?

A mixture of chili powder, cumin, paprika, garlic powder, onion powder, dried oregano, salt, pepper, and sometimes red pepper flakes for a little heat.

What to serve with chicken fajita casserole?

It's delicious with some tortilla chips and Chipotle tomato salsa, Moe's queso, or Taco Bell nacho cheese. If you're making the nacho cheese, you have to make these Taco Bell nacho fries for the ultimate side!

More Mexican Inspired Casserole Recipes

If you enjoyed this casserole recipe, we have a bunch of other delicious ones you can try next!

Here are some of our favorites:

• Mexican chicken casserole
• Tamale casserole
• Frito taco casserole
• Chicken taco casserole
• Beef enchilada casserole
• Mexican street corn casserole

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