Fajita Chicken Casserole Recipe – Packed with flavor and so quick to throw together! This chicken casserole is delicious as it is nutritious. Loaded with juicy chicken, peppers, and gooey cheese, seasoned with fajita spices, and baked to perfection, this quick chicken casserole dinner is equally wholesome and tasty. Since it only has a few simple ingredients and is all baked in one dish, you can have the fajita chicken casserole prepped and in the oven in as little as 10 minutes. If you are looking for a simple and delicious meal idea, try this keto-friendly, low-carb recipe tonight, it’s sure to impress the entire family. Make sure to visit our other chicken breasts recipes too. Enjoy!
Table of Contents
Photo credit: © Eatwell101.com
Ingredients list for the fajita chicken casserole recipe
- 3 or 4 small chicken breasts (1 1/2 lbs – 750g) skinless, boneless – or 2 large chicken breasts, split lengthwise
- 2 bell peppers, red and green, seeded and cut into strips
- 1 medium onion, minced
- 1 teaspoon cumin powder
- 1 1/2 teaspoon chili powder
- 1 teaspoon garlic powder, or minced garlic
- 2 teaspoon paprika
- 1/2 teaspoon salt and fresh cracked pepper to taste
- 1 tablespoon vegetable oil
- 1 cup shredded Mozzarella (or your favorite cheese, Pepperjack, Monterrey Jack, Cheddar…)
- Fresh chopped cilantro, or parsley, for garnish
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Directions
How to make the fajita chicken casserole:
1. Preheat your oven to 400°F (200°C). Lightly grease a baking dish.
2. Place chicken breasts on a shallow plate. Sprinkle cumin, chili powder, garlic, paprika, salt, and pepper on both sides. Keep some of the spices for sprinkling over the vegetable.
3. Arrange chicken breasts into the prepared baking dish, and drizzle with oil. Top chicken breasts with bell peppers and onion, then sprinkle some of the remaining fajita seasonings. Finish the casserole with shredded mozzarella cheese on top.
4. Bake the fajita chicken casserole for 20 – 30 minutes (if you split the chicken breasts lengthwise, or depending on the thickness); until chicken is cooked through and reaches an internal temperature of 165°F (74°C). You can broil your fajita chicken casserole for 2 minutes at the end to crisp up the top if you like. Serve the fajita chicken casserole immediately over cauliflower rice, steamed vegetable, zucchini noodles, or as is… enjoy!
Photo credit: © Eatwell101.com
Tips for the Fajita Chicken Breasts Casserole Recipe
- You can bake the chicken casserole without the cheese and add it at the end before broiling.
- Add chopped spicy sausage when cooking the fajita chicken casserole if you like a meatier dish.
- You can cut the chicken breasts into cubes to speed up the baking time.
- Freeze individual portions of the fajita chicken breasts casserole to have a comforting evening dinner when you don’t feel like cooking from scratch.
- Some of our readers found that the chicken fajita casserole has a better consistency if you cook the onions and peppers before adding them to the casserole. Cook onions in a skillet with a little bit of olive oil until translucent; add the peppers shortly before the onions are done. Then proceed as directed for the recipe.
What other readers say about this fajita chicken casserole recipe
“I didn’t measure seasoning but sprinkled liberally. It was delicious. Super easy and takes very little time. This one is a keeper!!!” – David
“I also used Mexican blend cheese and added shredded queso. The only other change was I used red, yellow, and orange peppers and left out the green and I didn’t measure the spices, just sprinkled generously. Especially the chili powder :) It was delicious!!” – Lauri
“Delicious! Family pleaser! Quick and easy! Picky eaters are ready for next time–no leftovers. Served the fajita chicken casserole over rice, with tostadas.” – Georgie
“100% recommend. I used boneless skinless chicken thighs instead of chicken breasts. Also added 4 cheese mexican instead of Mozzarella. If you’re in a pinch or don’t have all the seasonings, prepackaged Fajita seasoning works well too. For extra stuff, added sour cream and salsa to my personal plate and it was AMAZING” – Kelly
“OMG! This was excellent! I used chicken thighs instead of breasts and I cooked it 30 minutes instead of 20. Chicken was moist and cooked perfect. I used pepperjack cheese. Will definitely make this again!” – Chris
More chicken casserole recipes
- Spinach Chicken Casserole with Cream Cheese and Mozzarella
- French Onion Chicken Casserole
- Jalapeño Popper Chicken Casserole
- Broccoli Chicken Casserole with Cream Cheese and Mozzarella
Photo credit: © Eatwell101.com
Leave a Reply
Nanette
2025-04-21 19:11:22
It was very easy to prepare and the seasoning was perfect. The recipe is going into my collection. I will definitely make it again…and again
Debra
2025-04-06 21:45:52
Made this tonight. We love it. The crunchy peppers and onions and seasonings where awesome. Very good. Thank you for this receipe. Its a keeper!
Louise
2025-03-30 18:38:00
Just made this tonight for dinner, it was hands down a fabulous meal, and a keeper!!!
Francine
2025-01-23 19:43:50
Very tasty and easy to prepare. This is great for left overs the next night in tortillas. Yum, thanks
Shawn
2024-09-28 17:13:19
I love to find meals that take little to no time to prepare. (I keep sliced peppers and onions frozen for quick use) Tasted great. I recommend drying the chicken so there is not a lot of liquid in the bottom. Delicious.
Valerie
2024-08-13 19:53:14
Easy, quick and delicious!
CindyA
2024-05-27 07:37:24
Thank you for a simple and delicious recipe. I only had fresh mozza, so I chopped it up. It worked, but will use the other next time. I had to round it out with some queso fresco to have enough. I sauteed my peppers and onions briefly before adding to the casserole dish. Served over jasmine rice. Looking forward to making it again with a lovely chunk of shredded mozzarella. Will be a repeat. Thanks again.
Linda
2024-04-07 19:33:24
This chicken fajita recipe is fantastic! Easy to prepare and so delish! I used minced red onion and waited until the end to add the cheese. Definitely will make this again.
Kasey
2024-01-19 13:52:59
This was fantastic! My hubby and I will be having this once a week, it is that good! I used shredded chicken and added rice, but kept everything else the same and the flavor is amazing. Loved it!
Tina
2023-11-09 21:07:28
Omg this was so easy, delicious and packed full of flavor! I cheated though and used the fajita powder at the store! My husband was even amazed! I will definitely make it again!
Jess
2023-04-05 16:20:46
So grateful you share recipes that don’t start with other parts already needing done (ie cooked or rotisserie chicken). I get stuck on the ‘how’ for those before ever getting to the supposed ‘good part.’ I personally need to know what to do from the ground up. Thank you so much for sharing actually do-able recipes, that even my picky-butts eat, AND that also don’t require a day of dish-washing to follow!! It makes my kitchen SO much more approachable and I can’t tell you how much that impacts my days! THANK YOU!
Teresa Reynolds
2023-03-29 21:16:10
The spice blend was spot on for us. I used a variety of cheeses that we had on hand. Instead of adding oil to the casserole, I deglazed the browned chicken pan and added that. Served with shredded lettuce, diced tomatoes, and sour cream on the side. We don't feel deprived on induction. Thank you for a great recipe!
Melissa
2023-03-27 18:10:53
Quick and tasty
Suzy
2023-01-18 19:40:56
Very easy. Delicious. I sautéed the onions and peppers in cumin and chili seasoning before cooking
Suzy
2023-01-18 19:38:47
Loved this. Very easy. I did sauté the peppers and onions in cumin and chili seasoning before layering on chicken. It was a hit.
Erica Mcfadgon
2022-12-21 13:29:15
Great recipe!
Joan
2022-10-04 10:28:51
The recipe is very good but the web site is annoying. You have to scroll through far too many photos to get to the ingredients/directions.
Jeanne
2022-08-19 21:59:29
This was delicious! Super easy and so good ! It is definitely a keeper!!
Jeanne
2022-08-18 19:49:10
This was super simple to put together and so quick to cook ! We loved it!! Will certainly make again!
Libby
2022-07-14 23:36:10
Super easy to make and it turned out great! I didn't measure the spices out exactly and I used medium cheddar instead of mozzarella and it was delicious! Something I will definitely make again. My family loved it too!
Jen
2022-06-26 12:56:06
Loved this so good and easy to make
Christine
2022-06-11 16:25:45
This recipe is so delicious! I make it quite often, as it's so quick to put together, and I end up getting 3 or 4 meals out of it for myself. I usually use the pre-packaged fajita or taco seasoning for it, and whatever shredded cheese I've got on hand. I put the seasoning in a baggie, and toss each peace of chicken in it to make sure they're coated thoroughly. Whatever seasoning is left, I shake it over the peppers and onions, then add the cheese on top, and bake to yummy perfection. Makes for delicious soft tacos
Kelly
2022-05-21 22:57:40
Absolutely loved this recipe. I did sauté the onions and bell pepper prior to placing on the chicken. This recipe is now a favorite of my husbands. I served it with white rice, and it was perfect. The seasoning was very good on the chicken. I used pepper jack cheese because I didn’t have mozzarella, and it was delicious. Thank you for such a wonderful recipe!
karen
2022-03-15 17:52:06
Not only is this delicious but fairly quick & easy too! I used a lot of the seasonings, then drizzled with taco sauce ... i tossed LOTS of peppers & onions with oil & a bit of the same seasonings, sprinkled with taco cheese & baked. The leftovers were just as good the next day, maybe even better!
Tania
2022-01-04 18:29:40
It was so delicious! The chicken was so tender and juicy! Great leftovers for fajitas
Earla
2021-11-19 19:55:26
It is so delicious one of my favorites
Michelle
2021-11-04 21:16:13
It smells so good! I can’t wait for lunch tomorrow. Thank u so much for this recipe.
Betsy
2021-10-11 11:54:09
I am making this tonight, but it seems your carb amount is quite high. That is the reason I ran the recipe through my nutrition counter and got 8 carbs. I am on keto and I believe this is a great keto recipe. I will find out tonight when I check my blood glucose level. Thank you so much for recipe
Lauren
2021-09-09 09:48:32
I made this recipe with boneless pork chops and it was delicious and easy! Ty
Veronica
2021-08-17 17:47:58
I was looking for a new way to make chicken. I made this up and even the family loved it. It will definitely be a recipe I will use again.
Jessica
2021-08-13 15:01:46
There is alot of juice in the pan. Is that normal? I went crazy on with the onions and bell peppers, so maybe that's why
Craig
2021-07-26 20:55:46
Loved it, must say this recipe is ripe to adjust. I cooked the chicken ahead of time, then shredded it. I also added a couple spicy sausages that I grilled and cut up. I picked up small flour tortillas and we had tacos / fajitas with the chicken. Added sour cream and salsa. These minor tweaks were outstanding and only way I will make in future. My wife and son loved it.
Lin
2021-07-25 17:30:37
Very good!!
Lindsy
2021-07-20 14:41:41
has anyone tried to make this in a crock pot?
Elathia
2021-06-13 15:02:52
I fixed the fajita chicken casserole for dinner and it was delicious. I would definitely recommend this dish to other family and friends.
Jillian
2021-06-08 14:37:38
Made this for dinner last night! Was so good! Only think I added was a can of fire roasted red tomatoes and some chopped green chilis! We had with Spanish rice. Already added to our rotation :)
Rav
2021-05-21 21:13:55
I made this dish today for my friend and I for dinner. It was amazing! So easy to make, the flavors and chicken tested perfect. I made mine in a cast iron skillet and cooked it for about 40 mins. Thank you for sharing this recipe, we loved it!
Mary
2021-04-13 17:52:37
Made this for dinner tonight and it was delicious. Used red and orange peppers, and no salt or pepper because my husband is on a low salt diet. Will be making this again for sure.
Gretchin Allen
2021-03-25 20:36:03
SO MUCH FLAVOR that you forget it’s actually healthy and good for you. I had 3 boneless skinless chicken breasts that I cut in half (long ways). I did sprinkle a store packet of fajita seasoning on top of the peppers, onions and chicken. I used EVOO instead of Veg oil. I also drizzled with lime juice before adding the cheese. I used a little extra cheese and used a little cheddar in addition to Mozzarella. After baking, 30 mins, I garnished with a lot of chopped cilantro. Amazing!!! Fast, cheap and so so easy!! Moist, juicy, perfect!
Gretchin Allen
2021-03-25 20:09:28
Another Keto meal knocked out of the park! SO MUCH FLAVOR that you forget it’s actually healthy and good for you. I had 3 boneless skinless chicken breasts that I cut in half (long ways). I did sprinkle a store packet of fajita seasoning on top of the peppers, onions and chicken. I also drizzled with lime juice before adding the cheese. I used a little cheddar in addition to Mozzarella. After baking, 30 minutes, I garnished with a lot of chopped cilantro. Amazing!!! Fast, cheap and so so easy!!
Jennifer
2021-03-20 23:07:08
This is awesome!!! We changed up some things, though. We usually almost always double our recipes so we'll have leftovers...We use 4 large chicken breasts instead of 4 small ones. We use a large rectangular casserole dish. We use 4-6 peppers, usually red or a mix of red, yellow, and orange (don't care for the green). We use 4 large onions. We cook the onions down quite a bit because we don't like crisp/raw onions. We also cook the peppers down a little bit. We use salt, pepper, and a hint of oregano when cooking them down (pan-fry on stove top). We double the seasonings. Instead of regular chili powder, we use dark chili powder. Instead of regular paprika, we use smoked chipotle paprika. Instead of mozzarella cheese, we use sharp white cheddar, and we use 12 ounces of it shredded. Instead of vegetable oil, we use olive oil. Instead of use fresh chopped cilantro and parsley for garnish, we either don't use them at all, or I'll add a smidgeon of each to the seasonings mixture. Lastly, we have to leave it baking in the oven longer since we've doubled the chicken and added more of the other ingredients. We love it. It's SO easy. One time, I didn't feel like fussing with all of the "steps," so I threw the seasoned chicken in a crock pot with 6 small onions (whole) and the sliced peppers. After several hours, it was good to go. We pulled the chicken apart and made our own fajitas with soft tortillas that we warmed up quickly on the stovetop. We had lettuce, tomato, cheese, salsa, sour cream, El Paso taco sauce, and added sides of black beans and Spanish Yellow Saffron rice...Amazing!!! Better than tex-mex/Mexican restaurants we've visited.
Claudia
2021-02-21 19:27:44
Amazing- made this twice already and it’s so so good!
Heather
2021-02-19 18:40:07
Delicious and easy! Perfect weekday meal!
Brenda
2021-02-18 17:23:29
The secret to this recipe is to cook the chicken first, shred it and mix it with the other ingredients, bake for fewer minutes (30) at 375. Very tasty!
Beth W
2021-02-16 13:19:30
I want to make this but I would like to know whether I can assemble the casserole the night before and have hubby put it in the oven the following evening, or wouldn't this be a good idea with the raw chicken? Thanks!
Janie
2021-02-06 19:12:22
My husband really liked this. I thought it needed something, like a sauce, but don’t know what to do to make it less dry.
Julie
2021-02-04 19:57:44
Nice easy recipe but it takes longer to cook than 30 minutes. I also precooked my onions and peppers together so they would be soft. I used cubed chicken instead of full chicken breasts. After 30 min the chicken in the middle was not done. Gave it another 15 minutes. Would be good with cojita cheese also.
Mary Ann
2021-01-26 09:39:15
Delicious and so easy.
Krista
2021-01-22 19:28:36
Be prepared to cook this for around an hour. After 30 minutes cooking time, we took it out of the oven and the chicken was still completely raw. We split two chicken breasts in half. We even put a oven thermometer in the oven thinking our oven was on the fritz, but it was at 400 degrees. We covered with foil during the second half hour of cooking so the cheese wouldn’t get further burned. After an hour of cooking the chicken was cooked, but the cheese cooked down quite a bit. Otherwise the recipe is really tasty!
Linda
2020-12-26 19:04:15
I am constantly looking for easy and healthy recipes since I cook for my elderly parents weekly. I found this recipe and since my dad loves fajitas, I decided to try it. I boiled the chicken, so that it would be soft for them to eat and I didn't put the chili powder or pepper, because they don't like spicy. I added 1/2 can crushed tomatoes on top of the chicken and went light on the cheese. They loved it! I've made it for my kids and they love it as well, this is a new family favorite. I think I've made it 4 times in the past two weeks for my parents and us!
Britney
2020-11-12 19:53:00
Excellent dish! A new favourite!!
Corliss Readcorli
2020-11-05 05:32:18
Loving this
Andrea
2020-11-04 17:33:34
I made this recipe and it came out so delicious! I used boneless breast and split them in half, I served it with a side of cauliflower rice. It would be part of my menu from now on!
