Sometimes you need a meal that's easy to make and tastes insanely good. This low-carb, keto friendly Chicken Fajita Casserole is the perfect dish for those occasions!

The recipe is simple - just cook up some chicken thighs and some onions and peppers. Then mix it all together with cream cheese, taco seasoning, and shredded cheese. Once assembled, it only needs 30 minutes in the oven before its ready to serve.

You can serve this dish however you want: load it into some taco shells or eat it as a bowl meal. It's also great for leftovers since it reheats well in the microwave or oven.

It makes a delicious family favorite casserole!

a bowl with a serving of chicken fajita casserole, plus some salad.

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Skip the tortillas and bake everything in one pan; this recipe is part of my master guide to easy weeknight casserole recipes.

Why I love this recipe

I love a good casserole. Delicious comfort food at its finest.

But most casseroles are full of carbs like rice or noodles. So I'm always happy when I can find low-carb versions with all my favorite flavors. Delicious comfort food without the guilt!

But this is not just for the low-carb crowd. You can serve it in taco shells or with a side of rice (or rice and bean bake!).

Ingredients

(also needed: taco seasoning)

How to make chicken fajita casserole

Start by cooking the chicken. Use about a 2-quart (mine is 2.5) casserole dish. It'll seem too big for the task, but you will use the same dish for the assembled casserole, so this little bit of planning ahead will save on extra dishes to be washed later. When the chicken is cooked through, allow it to cool slightly, then shred or chop into bite sized pieces.

While the chicken is baking, slowly cook the onions and peppers in a skillet. Use medium-low heat to let the veggies caramelize; and stir occasionally. I like to let the veggies slowly cook the entire time the chicken is in the oven.

To assemble the chicken fajita casserole, first combine the cream cheese, taco seasoning and half of the shredded cheese in a large bowl. Add in the cooked chicken and vegetables.

all casserole ingredients in a mixing bowl.

Drain any cooking liquid in the casserole dish, then transfer the mixture into the dish. Top with shredded cheese, then bake until hot and bubbly.

Expert Tips/Variations

Use sweet bell peppers for the best result - red, orange, or yellow.
Volume of chicken and peppers does not have to be precise. I once made this with 1 ½ pounds of chicken, which ended up being very creamy, but still very good.
This casserole is low carb but also kid friendly. Use it to stuff a taco shell for another way to enjoy it!
Chicken thighs are my favorite for this casserole, but white meat also works. I have used a combination with great results. It's perfect for leftover or rotisserie chicken! Just skip to step 2 if your chicken is already cooked.
If you'd like to add even more variety to the casserole, mix in some corn, black beans, or cooked rice. This will make it less keto-friendly but might make it even more fun to eat. 😀

📖 Recipe

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chicken fajita casserole on a plate with salad.

5 from 84 votes

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