Sheet Pan Chicken Fajitas (Low-Carb and Keto)

This content originally appeared on Low Carb Yum. Republished with permission.

A sheet pan meal is a true lifesaver for those busy weeknight dinners. And these keto sheet pan chicken fajitas will hit the spot any day of the week! Made with low-carb bell peppers and perfectly seasoned chicken breasts, this quick and easy meal is sure to become a new staple in your household.

Why You’ll Love This Chicken Fajita Recipe

Having a go-to chicken fajita recipe is essential for everyone. This particular recipe is not only simple to make and packed with wholesome ingredients, but it’s also macro-friendly!

My oven-baked chicken fajitas stay true to their Mexican roots with a rich and flavorful taste, enhanced by the addition of fresh cilantro and lime juice. You definitely don’t want to miss out on trying these!

The best part?

These fajitas are totally keto-approved, so you can enjoy them guilt-free and without sacrificing your ketosis state.

In this post, I’m sharing how to make the best chicken fajita sheet pan meal that everyone in the family will adore.

I have included enjoyable serving suggestions and customization options to help you prepare the ideal chicken fajitas for your family.

Note: Craving Mexican food? Check out our post on 24 Of The Tastiest Keto Mexican Recipes!

Ingredients Needed

The ingredients in this easy chicken fajitas recipe are simple and low-carb, with maximum flavor payoff.

Here’s everything that makes up this yummy dish:

Chicken breast

The base of these fajitas is 1 pound of boneless skinless chicken breasts.

Chicken is a great keto food choice because it’s naturally low in carbohydrates and contains ample protein to keep you full and satisfied.

You can customize your cut of protein based on what you prefer or have one hand. For example, chicken thighs cut into thin strips will work just as well!

Note: I also have recipes for steak fajitas and shrimp fajitas that you can try out if the chicken isn’t your thing.


To enhance the flavor and nutritional value of sheet pan chicken fajitas, I added low-carb vegetables such as sliced red and green bell peppers, and yellow onion, for a classic twist on the recipe.

To top things off, a bit of minced garlic takes this dish to new heights!

Olive oil

To help your ingredients bake to perfection, a little olive oil goes a long way.

These chicken fajitas call for 2 tablespoons of olive oil to brown your ingredients and add extra healthy fat to the dish.

Lime juice

Some lime juice adds acidity and a touch of brightness to the recipe – enhancing the classic Mexican flavors.


Fresh herbs can make all the difference in a dish. And fresh cilantro is a Mexican food necessity!

If you’re not a fan of cilantro, you can skip this ingredient or substitute it with an extra squeeze of lime juice when serving; both add a bright flavor.


A recipe is only as good as its seasoning – and my homemade fajita seasoning blend is nothing short of delicious!

To season these keto chicken fajitas, I mix chili powder, cumin, oregano, paprika, and salt and pepper to taste.

You can also add fun additions like Swerve sugar-free sweetener and cayenne pepper if you prefer.

Cooking Tips:

Follow these quick tips to make amazing chicken fajitas without the hassle:

Pre-chop your ingredients for easy meal prep.
Make a jar full of fajita seasoning for quick use in your favorite recipes.
In a pinch, use store-bought fajita seasoning; simply mix and bake!

How To Make Sheet Pan Chicken Fajitas

These sheet pan fajitas couldn’t be simpler to pull together.

Here are the quick and easy steps:

Prep your sheet pan

Begin by preheating your oven to 425 degrees.

You’ll also want to prep your baking sheet with a bit of cooking spray or olive oil. For easier cleanup, use a bit of parchment paper on your baking sheet.

Chop and mix

Next, slice your boneless skinless chicken breasts, bell peppers, and yellow onion into thin strips, mixing to combine.

Then, transfer your chicken mixture onto your prepared baking sheet.

Season your ingredients

Begin seasoning your ingredients by drizzling olive oil over the chicken and vegetables.

Then, add your lime juice, minced garlic, and cilantro to the sheet pan. Sprinkle with all of your seasonings, including chili powder, cumin, oregano, paprika, and salt and pepper to taste.

Toss your ingredients until everything is well-coated.

Bake and enjoy

Finally, pop your prepared sheet pan into your preheated oven and bake for 20 minutes or until your chicken has cooked through.

And just like that, your keto chicken fajitas are cooked and ready to enjoy!

How To Serve

These chicken fajitas are totally customizable for any meal you require.

Serve them for dinner along with warm tortillas (I have recipes for caulifloweralmond flour, and coconut flour tortillas!) or a bed of cilantro lime cauliflower rice.

For yummy, customizable flavor combos, add a variety of toppings to the dinner table, including sour cream, guacamole, and low-carb salsa!

If you’re serving guests, include a couple of yummy side dishes in the menu, like burnt broccoli with taco mayo sauce or taco-stuffed yellow squash and green peppers.

Chicken fajitas are also delicious as leftovers. Enjoy them heated up on their own, inside a keto burrito bowl, or with a side of low-carb tortilla chips.


One of the best parts of these sheet pan chicken fajitas is how customizable they are based on your preferences, dietary restrictions, and the ingredients you have on hand.

Here are just a few ideas on how you could change things up:

Substitute fresh minced garlic with garlic powder.
Swap chicken breasts for chicken thighs.
Use store fajita or taco seasoning for a similar flavor profile.
Swap out cilantro for a bit of parsley and a squeeze of lime juice.


These are a few common questions I get about my sheet pan chicken fajitas recipe. If you don’t see your question answered, please leave it for me in the comments down below.

Are bell peppers a low-carb vegetable?

Bell peppers are widely considered a low-carb food, including approximately 4g net carbs per 100g of red bell peppers.

Orange and yellow bell peppers have similar carb counts. Green bell peppers, however, differ slightly, containing about 3g net carbs for the same 100g serving.

Overall, any form of bell pepper can be enjoyed on a low-carb diet.

Interested in learning more about eating veggies on a low-carb diet? Check out my posts on Are Bell Peppers Keto Friendly? and The Best Keto Vegetables.

Can you eat sour cream on keto?

Plain, full-fat sour cream is a keto-approved food – containing a significant amount of fat content and minimal carbohydrates.

100g of plain, full-fat sour cream contains 20g of fat and 2.9g of net carbs. Non-fat sour cream, however, contains significantly more carbohydrates and is not keto-friendly.

Add full-fat sour cream into your favorite meals with recipes like my easy tzatziki sauce!

Is chicken keto-approved?

Chicken is often a staple in many keto diets; it contains zero carbohydrates, is a significant source of protein, and is super versatile for meals across global cuisines.

100g of plain chicken breast contains 3.6g of fat, 0g of carbohydrates, and 31g of protein, easily fitting into your daily macronutrients.

If you’re wondering how to incorporate more chicken into your keto meal rotation, I have a post on 50 Keto Chicken Breast Dinner Recipes that you can explore!

Can you eat fajitas on a keto diet?

My sheet pan chicken fajitas are absolutely suitable for a keto diet. They contain only keto-friendly ingredients, including sugar-free seasoning, low-carb vegetables, and carb-free chicken breasts.

Not all fajitas, however, are made the same.

The main concerns with traditional fajita recipes are the seasonings and the serving suggestions.

Premade fajita seasonings, or homemade recipes that contain added sugars, can contain high carb counts and affect your ketosis.

In addition, fajitas are traditionally served with flour tortillas and high-carb sides like Mexican rice and refried beans.

Though convenient, these fajitas aren’t appropriate for a keto diet.

What tastes good on chicken fajitas?

In my opinion, chicken fajitas are their most delicious when loaded up with incredible extras.

My favorite chicken fajita toppings are sliced avocado, sour cream, hot sauce, and cheddar cheese.

Other tasty options include fresh pico de gallo, cilantro, salsa verde, and diced red onion.

If You Like This Recipe, Try These!

Looking for more easy sheet pan recipes to whip up in a pinch? Start with any of these tasty-low carb recipes:

Shrimp Fajitas Sheet Pan Recipe is prepared in just a few minutes with low-carb vegetables, steak, and homemade fajita seasoning; you can even make them into fajita bowls with iceberg lettuce, cauliflower, and your desired toppings.
Sheet Pan Pizza with Fish, Shrimp, and Scallops is perfect for seafood lovers and keto dieters alike! Prep ahead of time for easy baking.
One Pan Chicken and Veggies Bake is a classic dish, easy to customize with your favorite low-carb vegetables.
Sheet Pan Steak Fajitas is quick and easy to make with fresh avocado, jalapenos, and lime juice. Serve them with low-carb tortillas and a sprinkle of cheddar cheese.
Easy Oven Roasted Vegetables make for a tasty and nutrient-dense side dish to any of your favorite recipes. Add them to any dish that needs some extra veggies.


Sheet Pan Chicken Fajitas (Low-Carb and Keto)

A sheet pan meal is a true lifesaver for those busy weeknight dinners. And these keto sheet pan chicken fajitas will hit the spot any day of the week! Made with low-carb bell peppers and perfectly seasoned chicken breasts, this quick and easy meal is sure to become a new staple in your household.
Course Main Course
Cuisine Mexican
Keyword Gluten-Free
Prep Time 15 minutes
Cook Time 20 minutes
Total Time 35 minutes
Servings 4 people
Calories 226kcal


Sheet Pan


1 lb Boneless skinless chicken breasts cut into strips½ Red bell pepper sliced½ Green bell pepper sliced½ Onion sliced2 tbsp Olive oil2 tbsp Lime juice2 tsp Minced garlic2 tbsp Cilantro chopped1 tsp Chili powder1 tsp Cumin½ tsp Oregano½ tsp PaprikaSalt and pepper to taste


Preheat the oven to 425°F and spray a baking sheet with cooking spray.
Place the chicken, peppers, and onions onto the baking sheet.
Drizzle the olive oil over the chicken and vegetables.
Add the lime juice, minced garlic, cilantro, chili powder, cumin, oregano, paprika, and salt and pepper to taste to the sheet pan, and toss to coat everything well.
Bake for 20 minutes or until the chicken is cooked through.
Serve as is, or place into low-carb tortillas or over cauliflower rice if desired.


Notes on Nutritional Information
Nutritional information for the recipe is provided as a courtesy and is approximate only. We cannot guarantee the accuracy of the nutritional information given for any recipe on this site. Erythritol carbs are not included in carb counts as it has been shown not to impact blood sugar. Net carbs are the total carbs minus fiber.


Serving: 1g | Sodium: 170mg | Calcium: 49mg | Vitamin C: 38mg | Vitamin A: 1753IU | Sugar: 2g | Fiber: 2g | Potassium: 622mg | Cholesterol: 73mg | Calories: 226kcal | Trans Fat: 0.01g | Monounsaturated Fat: 7g | Polyunsaturated Fat: 1g | Saturated Fat: 2g | Fat: 11g | Protein: 25g | Carbohydrates: 6g | Iron: -75mg

Please note that the nutritional information may vary depending
on the specific brands of products used. We encourage everyone to check specific
product labels in calculating the exact nutritional information.


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