Cheesy Chicken Fajita Bake

Chicken fajita bake turns the classic stovetop chicken fajitas into an easy oven baked meal that cooks with no fuss no muss in 40 minutes. Layer cheese, chicken breasts, and seasoning over fajita veggies for a simple meal any night of the week. It's a Whole Lotta Yum!

Chicken Fajita Bake is super easy!

Chicken fajitas are one of the most popular recipes in our home and it's a dish we make regularly, usually by skillet. However, we wanted to try something different so we turned our family favorite into an oven baked version almost like a chicken fajitas casserole. 

Our chicken fajita bake recipe is high protein, low carb, keto, and gluten free. With just 10 minutes of prep, this recipe is almost effortless! 6.6 net carbs per serving.

When I created a recipe for chicken fajita bake, both my husband and son were out of town, leaving my daughter to the tasting. She LOVED this recipe so much she ended up eating 3 out of the 4 fajita chicken fajitas pieces! Kid taste tested approved!

Looking for more keto chicken recipes?  Be sure to check out our Cheesy Baked Salsa Chicken or viral Green Chili Chicken too.

Ingredient Notes

• chicken breasts - you can cut them lengthwise yourself or buy chicken cutlets already sliced in half.
• sugar-free taco seasoning or store bought fajita seasoning mix - we love to make our own with simple ingredients already in your pantry. You can make your own taco or homemade fajita seasoning, or look for store versions without processed ingredients or sugar.
• cheddar cheese - be sure to shred your own from a block to get the best texture, pre-shredded adds hidden starches. Pepper Jack cheese would be a nice variation.
• olive oil
• bell peppers - red and green bell peppers for color variety
• red onion
• Optional garnishes- fresh cilantro, sour cream, avocado, salsa

Supplies

• 2-3 qt baking dish (approximately 9x13-inch) or a large cast iron skillet

How to make low carb chicken fajita bake

 

1. Preheat the oven to 375 F.
2. Slice the bell peppers and onion into thin strips and set them in the bottom of a greased casserole dish. Sprinkle them with ½ tablespoon seasoning and drizzle with olive oil.  Note: cut your bell peppers as thin as possible. We like to have a little crisp and crunch to our vegetables, and the picture shows how the peppers turn out with the width we slice our vegetables. Try to slice them as thin as ⅛-1/4 inch for softer peppers.
3. For the chicken, you’ll want 4 pieces so the dish has 4 servings. Many grocery store chicken pieces are huge and you may need to cut the chicken breasts in half.  Our recipe used two chicken breasts that weighed a total of 1 ½ lbs. Alternatively, you can buy chicken cutlets that are already cut in half.
4. Sprinkle 1 tablespoon of taco or fajita seasoning over the top of the chicken.
5. Sprinkle with 1 ½ cups+ cheddar cheese.
6. Bake for 35-40 minutes, or until the chicken is cooked to 165F when tested in the center. Top with your favorite fajita garnishes such as sour cream, cilantro, sliced avocado, or salsa.

Recipe Tips

• You’ll want each piece of chicken to be about 6 oz and you may need to cut the chicken breasts in half to get this size. Chicken does not come in a consistent size at the grocery store, unfortunately. Focus on the weight of the chicken package versus the number of pieces.
• Boneless skinless chicken thighs can be used to make our chicken fajitas casserole, look for larger ones that are about 6 oz so the recipe will cook the same.

Common Questions

Can you Freeze Them?

Most definitely! Freezing the baked chicken fajita casserole will add more liquid to the dish, but it'll still taste super good. Feel free to add a fresh sprinkle of cheese before baking to freshen up the tasty cheesy chicken fajita bake. Store in the freezer for up to 3 months.

What to Serve with Keto Chicken Fajita Casserole?

To be honest, fajita chicken bake is one of those recipes it's a meal all on its own. With lean protein, lots of vegetables, healthy fat, and even dairy, it might not need a side dish.

But if you want something more on your table, we suggest a simple green salad or cauliflower rice. If you aren't eating low carb then white rice or Spanish rice are great ideas too.

More Keto Mexican Recipes

• Green Chili Chicken Casserole
• Low Carb Taco Pie
• Crockpot Taco Soup
• Sour cream chicken enchilada casserole

Recipe