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Easy Keto Chicken Fajitas Recipe 🥘

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Who says you can't relish Mexican food on a keto journey? Our Keto Chicken Fajitas recipe features juicy chicken, crunchy bell peppers, and caramelized onions. It's a one-pan dish, perfect for meal prepping. So, let's dive straight into the recipe!

Fajita chicken recipe in a cast iron pan.
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Preparation and cooking overview

In just 45 minutes, you can prepare and cook these delicious fajitas using a single pan. Simply mix the spices with olive oil, lemon juice, and minced garlic. Coat the chicken and sliced veggies with the mixture, and bake them in the oven for a few minutes until tender.

Chef's note

Feel free to tweak the seasonings of this recipe to your liking. If you enjoy a spicy kick, add a dash of cayenne pepper or sprinkle some smoked paprika into the spice mixture. And for a tasty chicken, marinate the sliced chicken breasts in the seasoning mix for 30 minutes to 1 hour before cooking. It might take a little patience, but the result will be worth it!

  • Prep Time: 10 minutes
  • Cooking Time: 35 minutes
  • Total Time: 45 Minutes
  • Difficulty Level: Easy
  • Recipe Makes 2 Servings

🥘 Ingredients for this keto chicken fajitas recipe

You will need a few kitchen staples and a handful of aromatics to make low-carb chicken fajita at home.

  • 1 pound skinless chicken breasts, cut into large slices
  • 3 bell peppers (any color), largely sliced
  • 1 red onion, largely sliced
  • 2 tablespoons olive oil
  • 2 tablespoons lime juice
  • 2 cloves garlic, minced
  • 1 teaspoon chili powder
  • ½ teaspoon paprika
  • ½ teaspoon dried oregano
  • ¼ teaspoon ground cumin
  • ¼ teaspoon sea salt
  • ¼ teaspoon freshly cracked black pepper
Sliced chicken breasts, sliced bell peppers, sliced onions, olive oil, lime juice, minced garlic, chili powder, oregano, cumin, salt, and black pepper spread out on kitchen table.

Ingredient substitutions

  • Olive oil: If you don't like olive oil, substitute it with avocado oil. It has a high smoke point and a neutral taste.
  • Garlic cloves: Use ½ teaspoon of garlic powder or jarred garlic cloves if you don't have fresh ones.
  • Dried oregano: If you can't find dried oregano in the store, replace it with Italian seasoning. It provides a touch of Mediterranean flavor.

Additional ingredients

Here are some optional ingredients that go well with this recipe:

  • Mushrooms: Add mushroom strips to the skillet before baking.
  • Jalapeno slices: If you're a fan of spicy food, add sliced jalapenos to the baked fajitas.
  • Fresh cilantro: Chop and sprinkle fresh cilantro over your finished dish for a fresh, herby twist.
  • Avocado slices: Toss in some sliced avocados atop the fajitas before serving.
  • Cheese: Sprinkle-grated cheddar over the top of the cooked chicken and veggies just before serving.
  • Sour cream: A dollop of sour cream on top of the chicken adds a creamy, tangy note. But choose a full-fat version to keep the dish keto friendly.
  • Lime or lemon wedges: Fresh lemon and lime juice is a great way to add a refreshing zing to any dish.
Low-carb fajitas cooked in a cast iron pan.

Cooking tools required

To make this Keto Chicken Fajitas recipe, you will need the following cooking tools:

  • Cast-iron skillet
  • Knife
  • Cutting board
  • Mixing bowl
  • Wooden or silicone spatula

Tools substitute options

  • Cast-iron skillet: If you don't have a cast-iron skillet, use a baking sheet or a sheet pan lined with parchment paper. Then, spread the chicken and vegetables in a single layer and bake as directed.
Low-carb chicken fajita.

How to make Keto Chicken Fajitas: step-by-step guide

Cooking methods

  • Baking

Preparation steps

  1. Gather all the ingredients needed for this recipe.
  2. Measure the ingredients in the right quantities.
  3. Slice up your chicken breasts into even-sized strips.
  4. Slice your bell peppers and red onion.

Cooking instructions

  1. In a small bowl, prepare the spice mixture. Combine olive oil, lime juice, minced garlic, chili powder, ground cumin, paprika, dried oregano, salt, and black pepper. Stir until well mixed.
  2. Preheat the cast-iron skillet in the oven to 425°F (220°C).
  3. Carefully remove the hot cast-iron skillet from the oven.
  4. Arrange the chicken strips, bell peppers, and onion in the skillet.
  5. Next, pour the seasoning mixture over the ingredients. Toss everything together to coat the meat and veggies evenly.
  6. Spread everything out in a single layer on the skillet.
  7. Then, bake in the preheated oven for about 35 minutes or until the chicken and the vegetables are tender.
  8. Stir halfway through the cooking time to ensure even cooking.
  9. Once cooked, transfer the fajitas to a serving plate, garnish with fresh herbs, and enjoy.
Olive oil, lime juice, minced garlic, chili powder, ground cumin, paprika, dried oregano, salt, and black pepper arranged on kitchen table.
Mixing the spices with olive oil in a cup.
Cast iron pan between sliced chicken and vegetables.
Cooking the sliced chicken and vegetables in a cast iron skillet.
Cooked fajita recipe.

Chef's pro tip

To ensure even cooking, slice the chicken, bell peppers, and onions into uniform pieces before baking them together. During the cooking process, resist the temptation to stir the ingredients too frequently. Instead, let them cook undisturbed to develop a delightful caramelized edge.

What to serve with low-carb chicken fajitas?

Pair the fajitas with a keto-friendly side dish for a complete meal. The options are as follows:

  • Cauliflower rice: This low-carb alternative to regular rice complements our fajitas' bold and vibrant flavors. You can create a perfect rice fajita bowl and enjoy a delicious meal!
  • Guacamole: Creamy, rich guacamole balances the heat of our Tex-Mex spices.
  • Keto tortillas: Pair the baked chicken fajitas with low-carb tortillas made from almond flour or coconut flour. They offer a traditional fajita experience.
  • Salsa: A fresh, homemade mango salsa brings a juicy, vibrant touch to the fajita chicken mixture.
  • Lettuce wraps: Use large fresh lettuce leaves to wrap your keto fajitas mixture. Alternatively, you can serve the dish over a bed of lettuce.
Fajita served in a bowl with herbs and lemon slice.

How to make it healthier?

  • Increase veggies: Add more bell peppers or non-starchy vegetables like zucchini or mushrooms for more fiber content.

Time-saving tips

  • Pre-mixed spice blend: Opt for a ready-made Tex-Mex or fajita seasoning blend when short on time. You'll get all the zesty flavors without the need for measuring individual spices.
Homemade chicken fajita recipe.

What can I prepare ahead of time?

  • Prep your chicken: Slice up the chicken and store it in the fridge. That way, the chicken will be ready to hit the skillet when you are ready.
  • Keto fajita seasoning: Whisk up your olive oil, fresh lime juice, minced garlic, and spices ahead of time. You can keep this mixture in an airtight container in the fridge.

Storage and reheating instructions

Storage tips

  • Refrigerator: Allow the leftover fajitas to cool to room temperature. Place them in an airtight container in the fridge. They'll stay delicious for up to 3-4 days.

Reheating instructions

  • Microwave: For a quick reheat, place your fajitas in a microwave-safe dish, cover, and heat on high for 2-3 minutes. Stir halfway through for even heating.
  • Stovetop: Warm your fajitas over medium heat in a skillet on the stove. Stir occasionally and heat for about 5-10 minutes.
Fajita recipe served in a bowl.

Recipe wrap-up and conclusion

Kick up the flavor of your keto journey with our mouthwatering Keto Chicken Fajitas recipe! This easy-to-make recipe allows you to enjoy a fiesta of flavors while staying on track with your low-carb diet. Pair it with a hearty side dish, and get a versatile dish perfect for a satisfying dinner, power-packed lunch, or meal prep.

This delicacy is a testament that cooking a classic dish on keto is possible and easy. So, we encourage you to try it and give it a shot! And don't forget to share your experiences with us in the comment section.

Frequently asked questions

It's best to use fresh chicken breasts for optimal flavor and texture. Frozen chicken release excess moisture during cooking, resulting in a watery dish. But, you can use it and adjust the cooking time.

Please check our recipe card below to check this recipe's total calories and carb count.

This recipe has a mild to medium level of spice. Feel free to add more chili powder or cayenne pepper if you prefer a spicier kick.

We don't recommend freezing. The texture of the vegetables becomes mushy upon thawing.

While we've suggested chicken breasts, you can opt for skinless, boneless chicken thighs. They are juicier and more flavorful.

Certainly! You can absolutely prepare the chicken and vegetables in advance and store them in the refrigerator. The cooked dish retains its flavor and texture when reheated, which makes it an excellent option for meal prepping.

Adding more lime juice or olive oil will help thin out the seasoning mixture and make it easier to coat your chicken strips.

Marinating is optional, but if you have the time, seasoning the chicken ahead of baking is recommended, as it allows the flavors to penetrate and enhance the taste.

📖 Recipe

Keto chicken fajitas.

Keto Chicken Fajitas

Savor the flavors of our Keto Chicken Fajitas recipe, featuring juicy chicken, vibrant bell peppers, and caramelized onions. A low-carb twist on a classic favorite!
5 from 1 vote
Print Rate Pin Recipe
Course: Main Course, Side Dish
Cuisine: Mexican
Keyword: Chicken fajita, Keto fajitas, low carb
Prep Time: 10 minutes
Cook Time: 35 minutes
Total Time: 45 minutes
Servings: 2
Calories: 466kcal

Ingredients

  • 1 pound skinless chicken breasts cut into large slices
  • 3 bell peppers any color, largely sliced
  • 1 red onion largely sliced
  • 2 tablespoons olive oil
  • 2 tablespoons lime juice
  • 2 cloves garlic minced
  • 1 teaspoon chili powder
  • ½ teaspoon paprika
  • ½ teaspoon dried oregano
  • ¼ teaspoon ground cumin
  • ¼ teaspoon sea salt
  • ¼ teaspoon freshly cracked black pepper
US Customary - Metric

Instructions

  • In a small bowl, prepare the spice mixture. Combine olive oil, lime juice, minced garlic, chili powder, ground cumin, paprika, dried oregano, salt, and black pepper. Stir until well mixed.
  • Preheat the cast-iron skillet in the oven to 425°F (220°C).
  • Carefully remove the hot cast-iron skillet from the oven.
  • Arrange the chicken strips, bell peppers, and onion in the skillet.
  • Next, pour the seasoning mixture over the ingredients. Toss everything together to coat the meat and veggies evenly.
  • Spread everything out in a single layer on the skillet.
  • Then, bake in the preheated oven for about 35 minutes or until the chicken and the vegetables are tender.
  • Stir halfway through the cooking time to ensure even cooking.
  • Once cooked, transfer the fajitas to a serving plate, garnish with fresh herbs, and enjoy.

Video

Nutrition

Nutrition Facts
Keto Chicken Fajitas
Amount Per Serving
Calories 466 Calories from Fat 189
% Daily Value*
Fat 21g32%
Saturated Fat 3g19%
Trans Fat 0.03g
Polyunsaturated Fat 3g
Monounsaturated Fat 12g
Cholesterol 145mg48%
Sodium 582mg25%
Potassium 1371mg39%
Carbohydrates 20g7%
Fiber 6g25%
Sugar 10g11%
Protein 51g102%
Vitamin A 6222IU124%
Vitamin C 241mg292%
Calcium 60mg6%
Iron 3mg17%
*

Nutritional values are estimates only and do not include carbs from sugar alcohols.

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