These wholesome Whole30/Paleo Sheet Pan Chicken Fajitas are perfect for busy weeknights: tender chicken and crisp vegetables roasted together on one pan. Finish with a dairy-free Cilantro Avocado Lime Sauce and serve in tortillas, over cauliflower rice, atop a salad, or wrapped in lettuce for a low-carb option.
Paleo & Whole30 Sheet Pan Chicken Fajitas – The best weeknight dinner
I’m a big fan of one-pan dinners that are quick, healthy, and delicious. These Paleo Sheet Pan Chicken Fajitas have earned a permanent spot on my dinner rotation. Picture juicy strips of chicken breast roasted until tender beside beautifully caramelized peppers and onions, all finished with a bright, creamy avocado sauce.
This simple sheet pan meal captures bold Mexican-inspired flavors with minimal fuss and minimal cleanup.
Why you’ll love this easy sheet pan dinner
These fajitas are practically effortless to prepare and super family friendly. Everything cooks together on a single sheet pan, so prep and cleanup are fast. The recipe is low carb, dairy-free, gluten-free and free of refined sugars—suitable for paleo and Whole30 when using the dairy-free avocado crema.
Despite being nutritious, the dish tastes indulgent—think restaurant-style sizzling fajitas without the extra work.
The dairy-free Cilantro Avocado Lime Sauce is bright, tangy and silky—great on these fajitas and versatile enough to use on salads, bowls or as a dip. It keeps well in the refrigerator for several days, so consider making an extra batch.
In short: naturally paleo, gluten-free, low-carb, economical and full of flavor. Even if you’re not following a specific plan, this sheet pan chicken fajitas recipe is an easy, crowd-pleasing weeknight option.
Are fajita mix and taco mix the same?
They’re very similar. Both blends typically include chili powder, cumin, garlic powder and oregano. For best flavor and control over sodium, I recommend making your own spice mix from whole spices rather than buying a pre-made packet.
How to make Creamy Cilantro Avocado Lime Sauce
Step 1 – Combine all sauce ingredients in a blender or food processor with about ½ cup of water. Blend until completely smooth, adding a tablespoon or two more water as needed to achieve a pourable, drizzle-able consistency. I often end up using close to 1 cup total, but adjust to your preferred thickness. Transfer the sauce to a container and set aside.
How to make taco seasoning for chicken fajitas
Step 2 – Whisk the spice blend together: chili powder, cumin, paprika, oregano, garlic powder and salt. Homemade seasoning is quick to mix and tastes fresher than commercial packets.
How to cook Sheet Pan Chicken Fajitas in the oven
Step 3 – Preheat the oven to 400°F (200°C). Arrange sliced bell peppers, red onion and chicken strips on a large baking sheet. Lining the pan is optional—see notes below.
Step 4 – Drizzle with olive oil and toss to coat everything evenly.
Step 5 – Sprinkle the spice mix over the chicken and vegetables and toss until everything is well coated.
Step 6 – Roast for 10 minutes, stir the pan, then roast another 6–10 minutes until the chicken reaches 165°F (no longer pink) and the vegetables are tender and slightly charred. Oven times vary, so check a thermometer to avoid overcooking.
Step 7 – Remove from the oven and serve immediately with the avocado-lime sauce.
Should I line the sheet pan?
No need. Skipping parchment or foil helps the vegetables and chicken develop better char and they usually release easily from the pan when cooked. If you prefer easier cleanup, you can line the pan, but browning may be reduced.
What to serve with chicken fajitas
Serve them traditionally with warm tortillas, pico de gallo and guacamole, or keep it low-carb with lettuce wraps. For a lighter option, serve the fajitas over a fresh salad. To build a bowl, pair them with cauliflower rice or broccoli rice and a generous drizzle of the avocado sauce.
Tips for making this sheet pan chicken recipe
- Use a mix of bell pepper colors for a vibrant presentation, though any color works.
- Do not overcook the chicken—use an instant-read thermometer and remove at 165°F for juicy results.
- Toss everything halfway through the roasting time so ingredients cook evenly and brown on all sides.
- The avocado sauce keeps several days in the fridge without browning because of the lime juice.
- This is a great meal-prep recipe: pack the chicken and vegetables, tortillas (or rice), and sauce separately.
- Want extra heat? Add sliced jalapeños with the peppers and onions.
- If reheating leftovers, warm them gently in a skillet to keep the chicken tender and the vegetables from becoming mushy.
Sheet Pan Chicken Fajitas with Creamy Cilantro Avocado Lime Sauce
These healthy Sheet Pan Chicken Fajitas are a fast, flavorful weeknight dinner: tender chicken and fresh vegetables roasted together and finished with a creamy cilantro avocado lime sauce. Serve with tortillas, cauliflower rice, salad, or in lettuce wraps for a low-carb option.
Main Course
American
sheet pan chicken dinner, sheet pan chicken recipes, sheet pan fajitas
Ingredients
- 1 yellow bell pepper cut into thin strips
- 1 green bell pepper cut into thin strips
- 1 red bell pepper cut into thin strips
- 1 red onion sliced
- 1 lbs chicken breast, cut into strips (one large breast) 450 g
- 2 tablespoons olive oil
- ½ cup fresh cilantro to serve
Spice mix:
- 2 tsp chili powder
- 1 tsp cumin
- 1 tsp paprika
- ½ tsp oregano
- ½ tsp garlic powder
- ½ tsp salt
Creamy Cilantro Avocado Lime Sauce
- 1 large ripe avocado or 1.5 if small
- 3 limes juiced – about 6 tablespoons
- 4 cups fresh cilantro roughly chopped (about a small bunch)
- 1 cloves garlic minced
- 3 tablespoons olive oil
- ¼ teaspoon ground cumin – optional
- ½ teaspoon sea salt
- Water
Instructions
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Preheat oven to 400°F (200°C).
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Prepare the sauce: blend all sauce ingredients with ½ cup water, then add a little more water as needed until smooth and drizzle-able. Transfer to a container and set aside.
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Mix the spices in a small bowl: chili powder, cumin, paprika, oregano, garlic powder and salt.
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Place bell peppers, onion and chicken on a large baking sheet. Drizzle with olive oil and toss to coat.
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Sprinkle the spice blend over the chicken and vegetables and toss until everything is evenly coated.
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Bake for 10 minutes, stir, then bake another 6–10 minutes until chicken reaches 165°F and the vegetables are tender and slightly charred. Check a thermometer to avoid overcooking.
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Remove from the oven and serve in tortillas or lettuce cups, over rice or cauliflower rice, with a few tablespoons of sauce and fresh cilantro.
Recipe Notes
- A mix of bell pepper colors looks best, but any color will work.
- Use an instant-read thermometer to ensure the chicken reaches 165°F for safe, juicy results.
- Stir the pan halfway through roasting so everything browns and cooks evenly.
- The avocado sauce stays fresh in the fridge for a few days thanks to the lime juice.
- Great for meal prep: pack protein, veggies and sauce separately to preserve texture.
- Add sliced jalapeños with the peppers for extra heat.
- Reheat leftovers gently in a skillet to keep textures intact instead of using the microwave.
If you try this Sheet Pan Chicken Fajitas recipe, please rate it and leave a comment to share how it turned out—I love hearing feedback!
More healthy sheet pan chicken dinners:
- Sheet Pan Za’atar Chicken Dinner
- One Pan BBQ Chicken Dinner
- Easy Baked Chicken Thighs
- Sheet Pan Mustard Chicken Thighs with Roasted Asparagus