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Instant Pot Chicken Fajita Casserole – A Great Low-Carb Recipe

When I first made this Instant Pot Chicken Fajita Casserole, I wasn’t expecting that it would become one of our favorite low-carb meals. But ever since then I get asked at least weekly if I can make it for dinner.

instant pot chicken fajita casserole

As much as we love our standard Chicken Fajita recipe that we make in the pressure cooker, there is just something extra special about this recipe. I am sure it has to do with the creamy texture that comes from the cheese and sour cream that makes it over the top delicious.

However, just like chicken fajitas, it is still a low-carb, Keto friendly recipe. That is of course if you don’t serve it with Mexican Rice or Refried Beans.

If I am watching my carbohydrate intake, I will either eat it as a stand alone main dish or serve it over a bed of cauliflower rice. There is so much flavor in this recipe that it is delicious both ways!

Instant Pot Chicken Fajita Casserole


  • Chicken Breast
  • Bell Pepper
  • Onion
  • Picante Salsa
  • Fajita Seasoning
  • Cream Cheese
  • Sour Cream
  • Shredded Cheddar Cheese
peppers and onions
Once your peppers and onions are sliced, add them to a HOT Instant Pot and saute until just tender.

Equipment Required

Electric Pressure Cooker

*This recipe was tested in an Instant Pot 6 quart Duo and the Ninja Foodi 6.5 quart pressure cooker and air crisper.


The first step in making Instant Pot Chicken Fajita Casserole is to slice the chicken breasts into thin strips. Using a sharp knife, cut across the grain of the meat to get the most tender chicken when cooked.

thin chicken strips
Slice the chicken into thin strips so that they will cook quickly. This will help prevent the peppers and onions from becoming too mushy.

Then, using a different cutting board, slice the bell peppers and onions into thin strips as well. You can use any type of bell peppers that you have on hand. When I made it this time, I used one red and one green bell pepper.

However, in the past I have used all green, all red, and combination of red and yellow peppers in this. It all tastes great! If you are on a tight budget, I would recommend adding only green peppers to your Instant Pot Chicken Fajita casserole, as they are much cheaper.

Next, turn your Instant Pot to the SAUTE mode. Once the front display shows HOT, add the oil. Then add the peppers and onions and saute until slightly tender, about 3-5 minutes. Remember, they will continue to soften during the pressure cooking process.

instant pot chicken fajita casserole
Using Picante Salsa rather than a thick and chunky salsa will help prevent the burn notice from appearing.

Now press CANCEL. Then add the chicken strips, fajita seasoning and the jar of Picante Salsa and stir. We do not recommend using a thick and chunky salsa as you increase your chances of getting the BURN notice as it cooks.

Picante salsa is thinner and we have never received the warning when making this Chicken Fajita Casserole in our Instant Pot.

Cooking Time Required

Now lock the lid in place and move the valve to the SEALING position if required on your model. Press Manual or Pressure cook and make sure that your Instant Pot is set to HIGH pressure.

Then press the cook timer for 6 minutes. Just like with all pressure cooking recipes, time is required for the pot to come to pressure before the actual cook time begins. Although all models are different, plan for 8-10 minutes for your pot to come up to pressure.

When the cook time for this low-carb chicken fajita casserole expires, let the pot sit for 5 minutes before carefully releasing the remaining pressure by turning the valve to the VENTING position.

instant pot chicken fajita casserole
The last step in this recipe is to stir in the sour cream, cream cheese and shredded Cheddar cheese. This is what gives this casserole that creamy texture.

When the pin drops, carefully remove the Instant Pot lid and stir the chicken fajita casserole. Then stir in the cream cheese, sour cream and shredded cheese.

Replace the lid and let it sit for 2-3 minutes for the cheese to melt. Stir it one more time and serve immediately. Enjoy!

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Yield: 6

Instant Pot Low-Carb Chicken Fajita Casserole

instant pot chicken fajita casserole

A low-carb alternative to classic Chicken Fajitas. Thin strips of chicken, onions and peppers cooked with salsa and fajita seasoning and blended with a cheesy sauce for the perfect Keto dinner recipe.


  • 1.5 lbs. chicken breasts, sliced into thin strips
  • 2 bell peppers, sliced
  • 1 medium onion, sliced into thin strips
  • 15 ounces picante salsa
  • 2 tbsp fajita seasoning
  • 4 oz. cream cheese
  • 1 cup sour cream
  • 1-2 cups shredded Cheddar cheese


  1. Turn the Instant Pot on Saute mode. Once hot, add the oil, onion, and bell pepper and cook 3-5 minutes until soft.
  2. Add chicken strips, picante salsa & fajita seasonings. Stir to mix well.
  3. Lock lid in place and move the valve to SEALING position. Pressure Cook/Manual on high pressure and cook 6 minutes. Once the cook time is up, let the pot Natural Pressure Release for 5 minutes.
  4. Carefully release any remaining pressure by slowly moving the valve to the VENTING position.
  5. Stir in the cream cheese, sour cream and shredded cheese. Replace the lid and let melt for 5 minutes. Open lid and stir until all the cheese has melted.
  6. Serve as is or over a bed of cauliflower rice.


Recipe provided by Make Your Meals

Nutrition Information:



Serving Size:

1 grams

Amount Per Serving: Calories: 386Total Fat: 23gSaturated Fat: 13gUnsaturated Fat: 0gCholesterol: 133mgSodium: 909mgCarbohydrates: 11gFiber: 3gSugar: 7gProtein: 32g
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