I held out a long time before getting an air fryer, a one-trick appliance felt unnecessary until my oven broke and I picked up a combo unit out of necessity. Keto air fryer chicken fajitas are one of the reasons I barely use my oven anymore.
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Not all air fryers run the same though, so always check your manufacturer guide for times and temperatures. Mine runs hot, so 350 degrees is plenty to cook the chicken through without drying it out.
This is written for a basket-style air fryer specifically. Other styles may need some adjustment.
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Chef Jenn’s Take on Air Fryer Fajitas
Assuming every air fryer cooks the same way is an easy mistake. Models vary a lot in actual heat output, so check your own manufacturer’s guide for times and temperatures rather than trusting a recipe’s numbers blindly. This is written for a basket-style air fryer specifically.
Cook the chicken alone first, in a single layer, at 350 degrees for about 10 minutes. Then flip or toss it, add the peppers and onion right on top, and cook another 5 to 8 minutes, until the chicken reaches 165 degrees. Marinating the chicken in the seasoning and oil for a few hours ahead adds more flavor if you have time, though it works fine without it too.
I use my own homemade taco seasoning here, which runs medium spicy. Add more chipotle powder or cayenne for more heat. This is also flexible on protein and vegetables, chicken thighs work in place of breast, and zucchini, asparagus, or green beans all stretch the dish further.
One note on the nutrition figures: they do not include the seasoning itself; add about half a net carb per serving if using my own Fiesta Seasoning.
What You’ll Love About Air Fryer Fajitas
- Flexible enough to stretch further with extra vegetables or a different protein.
- On the table in under 30 minutes, no grill or stovetop babysitting required.
- Loaded with colorful veggies and tender chicken, genuinely family-friendly.
Ingredients
- Chicken breasts – Boneless, skinless, sliced into strips. Boneless thighs work as a substitute.
- Bell peppers – Red and yellow, sliced into strips.
- Red onion – Sliced into thin strips.
- Keto taco seasoning – Homemade keeps this cleaner and lets you control the heat level.
- Cooking oil – For tossing with the chicken and seasoning.
How to Make Air Fryer Fajitas
Scroll down for the full recipe card with exact measurements and printable instructions.
Slice the chicken into 1/2-inch wide strips and toss with the taco seasoning and oil.
Clean the peppers, remove the stems, and slice into 1/4-inch wide strips. Peel and slice the onion into thin strips.
Air fry the chicken in a single layer at 350°F for about 10 minutes, then flip or toss.
Add the peppers and onion on top of the chicken and cook another 5 to 8 minutes, until the chicken reaches 165°F. Serve with your favorite fajita toppings.
Make It A Meal
For a Mexican night buffet, pair this with Al Pastor Pork Carnitas and don’t forget Creamy Jalapeno Dip on the side. For more Tex-Mex dinners in the rotation, Chicken Taco Casserole and Tex-Mex Beef Casserole are both worth adding.
Storage
Chill fully in the fridge or freezer before packaging in an airtight container, vacuum sealed if you have the equipment, for up to 3 months. Thaw fully, then reheat slowly on low heat in the air fryer, or in the microwave. Peppers lose some texture after freezing but stay just as tasty.
Frequently Asked Questions
This recipe runs about 4 net carbs per 1 cup serving. This does not include the seasoning, add about half a net carb per serving if using homemade taco seasoning. The number in the recipe card below will recalculate once this post is republished, so use it as an estimate until then.
Yes, boneless thighs work well as a substitute for breast.
Serve in a lettuce cup with your favorite toppings. For less strict keto, a low-carb tortilla works well too.
Yes, zucchini, asparagus, or green beans all work well to stretch this further.
Add Preferred SourceAir Fryer Fajitas
Ingredients
- 2 boneless skinless chicken breasts
- 1 medium red bell pepper sliced
- 1 medium yellow bell pepper sliced
- 1 cup red onion sliced
- 2 tablespoons Fiesta Seasoning
Instructions
- Slice the chicken into 1/2-inch wide strips and toss with 2 tbsp of Fiesta Seasoning, and 1 tbsp of oil.
- Clean the peppers and remove the stems. Slice the peppers into 1/4-inch wide long strips.
- Peel and slice the onion into thin strips.
- Air fry the chicken at 350-F for about 10 minutes, then toss.
- Add the peppers and onions to the chicken and cook an additional 8-10 minutes or until the chicken reaches 165-F degrees.
- Serve with your favorite fajita toppings!
Notes
Recipe Card Tips
- Check your own air fryer’s manufacturer guide for times and temperatures. Models vary a lot in actual heat output.
- Cook the chicken alone first, then add the peppers and onion on top for the last several minutes.
- Marinate the chicken in the seasoning and oil ahead of time if you have a few hours, for more flavor.
- The nutritional values do not include the seasoning. If you use my Fiesta Seasoning, add .5 net carbs per serving for the seasoning. Please refer to the recipe card on the Fiesta Seasoning post to get the full nutritional breakdown.
Nutrition
A Note on Nutritional Information
Nutritional information for this recipe is provided as a courtesy and is calculated based on available online ingredient information. It is only an approximate value. The accuracy of the nutritional information for any recipe on this site cannot be guaranteed. Erythritol carbs (sugar substitutes) are not included in the carbohydrate counts as they have been shown not to impact blood sugar, and they have zero calories and zero carbs. Net carbs are the total carbs minus fiber.
Want even More Keto Deliciousness?
I’m always trying new recipes, but these easy keto recipes are among my current favorites:
- Crack cauliflower
- A meaty hash for breakfast
- Sauerkraut & sausage in the IP
- Grilled veggies
- and if you need help counting carbs, check out this net carb calculator!
Fajitas are my favorite! I just recently purchased an air fryer, so I can’t wait to try this recipe out!
Such an easy and simple way to prepare fajita chickens. Now it’s almost weird not to have more fajitas at home. 🙂
I’ve been on the fence about getting an air-fryer as well, but after seeing this post I think I might give it a try! These fajitas look delicious! I look forward to trying the recipe
Simple and easy, just how I like my recipes! Thanks for this great 5 ingredient dinner meal.
My ideal type of quick dinner recipe. Air fryer is a godsend if you want to shorten cooking time.
Super easy and super delicious! Doesn’t get any better than that for our busy weeknights. Thanks for another winner!
My favorite time about this recipe is the timing. It is amazing how quickly you can serve these!
Yum! Such an easy and flavorful weeknight meal. Love all the color from the bell peppers and onion.
Air fryers really are a blessing! It’s amazing how quick it can get to bring to the table delicious fajitas like these! Wrapped in a lettuce leaf is a perfect low carb dinner any day!
These chicken fajitas look great! Such a simple idea for making a fajita dinner.