Bold, sizzling, and packed with smoky spice—Chicken Fajitas are the perfect protein-rich, low-carb dinner with serious fiesta vibes. No need to miss out on flavour while cutting carbs! This version skips the sugar and starch but keeps all the juicy, zesty goodness.
🌟 Top Tip:
Use a cast-iron skillet to get that signature fajita sizzle and charred edges—it makes a big difference in flavor.
🛒 Ingredients for Low Carb Chicken Fajitas (Serves 4)
For the Chicken & Veggies:
- 1.5 lbs (680g) boneless, skinless chicken breasts, sliced into strips
- 1 red bell pepper, sliced
- 1 yellow bell pepper, sliced
- 1 green bell pepper, sliced
- 1 medium red onion, sliced
- 2 tbsp olive oil
- Juice of 1 lime
- 3 garlic cloves, minced
Fajita Seasoning Mix:
- 1.5 tsp chili powder
- 1 tsp ground cumin
- 1/2 tsp smoked paprika
- 1/2 tsp onion powder
- 1/2 tsp garlic powder
- 1/4 tsp cayenne (optional)
- 1/2 tsp salt
- 1/2 tsp black pepper
Optional Add-ons:
- 4 low-carb tortillas or lettuce wraps
- 1 avocado, sliced
- Fresh cilantro, lime wedges, sour cream, or cheese
🔥 How to Make Chicken Fajitas (Step-by-Step)
- Toss the Chicken
In a bowl, mix chicken with half of the seasoning, 1 tbsp olive oil, garlic, and lime juice. Set aside to marinate for at least 15 minutes. - Sauté the Veggies
Heat 1 tbsp olive oil in a large skillet over medium-high heat. Sauté the peppers and onions for 5–7 minutes until tender-crisp. Season with remaining fajita mix and remove from pan. - Cook the Chicken
In the same skillet, cook chicken strips over medium-high heat for 5–6 minutes, turning occasionally, until fully cooked and slightly charred. - Bring It All Together
Add veggies back into the pan with the chicken and toss to combine. Cook for another minute to heat through. - Serve
Serve in low-carb tortillas, lettuce cups, or over a bed of cauliflower rice. Add avocado, lime, and your favorite toppings.

📊 Nutritional Information (Per Serving without tortilla)
- Calories: 310
- Protein: 33g
- Net Carbs: 6g
- Fat: 17g
- Fiber: 3g
💡 Handy Tips
- Batch-cook the chicken and veggies ahead of time for quick meal prep.
- Want it smoky? Add a few dashes of chipotle powder or grilled poblano peppers.
- Don’t overcrowd the pan—cook in batches for best sear.
❓ Chicken Fajita FAQs
Q: Can I bake this instead of using a skillet?
A: Yes! Spread everything on a sheet pan and bake at 425°F (220°C) for 20–25 minutes, tossing halfway.
Q: Are fajitas keto-friendly?
A: Absolutely—as long as you use low-carb tortillas or lettuce wraps.
Q: Can I freeze leftovers?
A: Yes, freeze the cooked chicken and peppers for up to 3 months. Reheat in a skillet or microwave.