Keto Baked Chicken Fajitas are a delicious and healthy twist on a classic Mexican dish that is perfect for those following a low-carb lifestyle. Juicy chicken breasts are marinated in a zesty blend of spices, then baked alongside vibrant bell peppers and onions, creating a colorful and flavorful meal. This recipe is not only satisfying and packed with protein, but it is also incredibly easy to prepare, making it a go-to option for busy weeknights or meal prep.

Why You Will Love This Recipe
You’ll love this Keto Baked Chicken Fajitas recipe for several reasons. First, the flavors are outstanding—smoky cumin paired with zesty lime and fresh vegetables creates a mouthwatering dish that will satisfy your cravings without the carbs. Second, it’s an incredibly straightforward recipe that requires minimal hands-on time; simply marinate, bake, and serve. Plus, it fits seamlessly into a keto diet, allowing you to enjoy a hearty meal without sacrificing your dietary goals.
Tips and Tricks
To ensure your Keto Baked Chicken Fajitas turn out perfectly, consider these handy tips:
- Marination: For maximum flavor, marinate the chicken for at least 30 minutes, but if you can, let it sit in the fridge for a few hours or overnight.
- Uniform Slices: Cut your chicken and vegetables into uniform sizes for even cooking, ensuring that everything comes out tender and juicy.
- High Heat: Bake at a high temperature (about 400°F) to achieve caramelization on the veggies and a nice sear on the chicken.
- Skillet Finish: For an extra crispy texture, finish the dish under the broiler for a couple of minutes after baking.
Make Ahead Tips
If you’re meal prepping or short on time, you can prepare this dish in advance:
- Marinate Ahead: You can marinate the chicken and vegetables up to 24 hours in advance. Just keep them in an airtight container in the fridge.
- Chop Ahead: Pre-chop your veggies and store them in the refrigerator. They will stay fresh for about 3-4 days.
- Fully Cooked Storage: Cooked fajitas can be stored in the fridge for up to 4 days, making them perfect for lunch or quick dinners.

Recipe Variations
Feel free to customize your Keto Baked Chicken Fajitas:
- Protein Swaps: Substitute chicken with shrimp or beef for a different protein option.
- Spice Levels: Add jalapeños or a pinch of cayenne pepper for some heat.
- Cooking Method: Try grilling instead of baking for a smoky flavor or using a slow cooker for tender chicken.
How to Serve
Serve your finished Keto Baked Chicken Fajitas hot from the oven, garnished with fresh cilantro, lime wedges, and a dollop of sour cream or guacamole. This dish can be served over a bed of lettuce for a fajita salad, or alongside cauliflower rice for a fulfilling meal.

Pairing Suggestions
Pair your Keto Baked Chicken Fajitas with a refreshing drink like a sparkling water with lime or a low-carb margarita. For sides, consider a simple avocado salad or a zesty cilantro-lime cauliflower rice. If you’re looking for dessert, a sugar-free cheesecake can be a delightful treat.
How to Store
To store leftovers, allow the fajitas to cool completely, then transfer them to an airtight container. They can be refrigerated for up to 4 days. For longer storage, freeze them in portion-sized containers for up to three months. Reheat in the oven or microwave until warmed through.
Equipment Needed
You’ll need a baking sheet or a large oven-safe dish for this recipe. A mixing bowl for marinating the chicken and vegetables is also essential. Alternatively, you can use a cast iron skillet for both marination and baking, giving you an easy one-pan meal.

Dietary Adaptations
For those with dietary restrictions:
- Dairy-Free: Omit the cheese and sour cream, or use a dairy-free alternative.
- Nut-Free: This recipe is naturally nut-free, but always check ingredient labels for potential cross-contamination.
- Vegetarian Option: Substitute the chicken with firm tofu or tempeh and follow the same marinating process.
Seasonal Adaptations
In the summer, use fresh, vibrant vegetables like ripe tomatoes and corn for a seasonal twist. In the winter, consider adding hearty root vegetables like zucchini or squash for added texture and flavor.
Recipe FAQs
- Can I use frozen chicken? Yes, but make sure it is fully thawed before marinating to ensure even flavor.
- What can I substitute for bell peppers? Zucchini or mushrooms work well in place of bell peppers if you prefer.
- How long do I bake the chicken? Bake for about 25-30 minutes, or until the chicken is cooked through and the vegetables are tender.
How To Make Keto Baked Chicken Fajitas
Keto Baked Chicken Fajitas

Keto Baked Chicken Fajitas are a delicious and healthy twist on a classic Mexican dish that is perfect for those following a low-carb lifestyle.
Ingredients
- 1.5 lbs boneless, skinless chicken breasts
- 2 bell peppers (any color), sliced
- 1 medium onion, sliced
- 3 tablespoons olive oil
- 2 tablespoons chili powder
- 1 tablespoon cumin
- 1 teaspoon paprika
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
- Salt and pepper to taste
- Juice of 1 lime
- Fresh cilantro for garnish
Instructions
- Preheat your oven to 400°F (200°C).
- In a large mixing bowl, combine olive oil, chili powder, cumin, paprika, garlic powder, onion powder, lime juice, salt, and pepper. Mix well.
- Add the chicken breasts to the bowl and coat them thoroughly with the marinade. Let them marinate for at least 30 minutes.
- While the chicken is marinating, slice the bell peppers and onion.
- On a large baking sheet, arrange the marinated chicken breasts and scatter the sliced vegetables around them.
- Bake for 25-30 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F.
- Optional: Broil for an additional 2-3 minutes for extra crispiness.
- Remove from the oven, garnish with fresh cilantro, and serve with lime wedges.
Nutrition Information
Yield
4Serving Size
1Amount Per Serving Calories 422Total Fat 17gSaturated Fat 3gTrans Fat 0gUnsaturated Fat 13gCholesterol 145mgSodium 322mgCarbohydrates 11gFiber 3gSugar 3gProtein 55g
All Chicken Recipes.com, occasionally offers nutritional information for recipes contained on this site. This information is provided as a courtesy and is an estimate only. This information comes from online calculators. Although allchickenrecipes.com attempts to provide accurate nutritional information, these figures are only estimates.
Final Thoughts
Keto Baked Chicken Fajitas are not only a feast for the eyes but also a wholesome and satisfying meal that fits perfectly into a low-carb lifestyle. With their rich flavors and simple preparation, they are sure to become a regular in your dinner rotation. Enjoy experimenting with different flavors and variations, and don’t forget to share this delicious recipe with your friends and family!