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A pair of tongs grabbing a scoop of fajita fillings from a sheet pan with warm tortillas beside the meat and veggies

Sheet Pan Chicken Fajitas

These easy Sheet Pan Chicken Fajitas are a one-pan meal you'll fall in love with! Fresh veggies and juicy chicken are flavored with a smoky, spicy seasoning blend, roasted in the oven, then loaded into your favorite tortilla wrappings. They're gluten-free, dairy-free, keto, low carb, keto and Whole30-friendly. 

Course Dinner
Cuisine Mexican
Keyword chicken fajitas baked, chicken oven fajitas, fajita marinade
Prep Time 15 minutes
Cook Time 20 minutes
Total Time 35 minutes
Servings 4
Calories 342 kcal
Author Kelly


For the Marinade

  • 2 teaspoons chili powder
  • 1 teaspoon garlic powder
  • 1 teaspoon cumin
  • 1/2 teaspoon smoked paprika
  • 1/2-1 teaspoon fine grain sea salt , to taste
  • 1/4-1/2 teaspoon freshly ground black pepper , to taste
  • 1/8 teaspoon cayenne pepper optional, or to taste

For the Fillings

  • 2 boneless skinless chicken breasts , cut into 1/4" strips
  • 4 bell peppers , sliced into thin strips
  • 1 red onion , sliced into thin strips
  • 3 tbsp avocado oil or olive oil
  • 2 tbsp fresh lime juice (about 1 medium lime) , divided

For Serving

  • chopped fresh cilantro
  • lime wedges
  • sliced avocado
  • warm tortillas , we like these Almond Flour Tortillas to keep this recipe grain-free, low carb and paleo-friendly, but you can use jicama wraps for Whole30 or any ortillas you like. 


  1. Preheat oven to 400°F. Line a large baking sheet (use two if necessary) with parchment paper or grease with oil spray.

  2. In a resealable small jar, combine all the ingredients for the seasonings. Seal and shake well. Reserve about 1 teaspoon for the vegetables.

    Mixed fajita seasonings in a clear bowl with a spoon
  3. Add the chicken to a large bowl or place in a large zip-top bag. Drizzle with 1 tablespoon of oil and lime juice. Add 5 teaspoons of the seasonings. Toss to coat well or seal the bag while pressing down. (if prepping this ahead of time, you can also marinate the chicken in the fridge overnight)

    Raw chicken breasts in a clear bowl with seasonings
  4. Spread the bell peppers and onions into an even layer on the baking sheet being careful not to overcrowd the pan.

    Drizzle with 1 1/2 tablespoons olive oil and season with the remaining seasonings. Use hands or tongs to toss and coat well.

  5. Push the vegetables to the sides of the pan and add the chicken to the pan. Try not to overlap too much and keep everything in a single layer.
    Thinly sliced vegetables and chicken on a metal baking sheet with a raised rim
  6. Bake in the preheated oven for 17-22 minutes (flipping chicken and tossing vegetables halfway through) or until peppers are tender and chicken is cooked through and reaches 165°F.  You can remove vegetables first if the chicken is not fully cooked yet.

    A close-up shot of roasted chicken, onion and peppers on a baking sheet
  7. Serve over cauliflower rice, in a salad or with warm tortillas with sliced avocado and your favorite toppings.

    Warm tortillas on a sheet pan with roasted chicken, bell peppers and red onions

Recipe Notes

  • Nutrition information does not include toppings or tortillas.
  • To Warm Tortillas: Wrap in aluminum foil and add to the top oven rack during the last 5 minutes of baking.
  • To Store Extras: If you expect leftovers, only warm the number of tortillas you'll need at that time. Cooled fajita fillings can be kept in an airtight container in the fridge for up to 4 days.
  • To Reheat: Reheat fillings on a greased baking sheet at 350°F with foil covering them, adding a splash of oil so nothing dries out, until the meat and veggies are heated through. This should take about 15 minutes.
Nutrition Facts
Sheet Pan Chicken Fajitas
Amount Per Serving (1 serving)
Calories 342 Calories from Fat 117
% Daily Value*
Fat 13g20%
Carbohydrates 8g3%
Fiber 4g16%
Sugar 3g3%
Protein 37g74%
* Nutrition facts are provided as a courtesy using the WPRM recipe calculator. It is best to make your own calculations to ensure accuracy. We expressly disclaim any and all liability of any kind with respect to any act or omission wholly or in part in reliance on anything contained in this website. Percent Daily Values are based on a 2000 calorie diet.