Easy Weeknight Chicken Fajitas on a Sheet Pan

Restaurant fajitas come out sizzling on a hot iron plate. At home, the easiest way to get close is your oven. This recipe for easy weeknight chicken fajitas on a sheet pan roasts sliced chicken, bell peppers and onions all together in a hot oven. The edges brown, the peppers get sweet, and you only have one pan to wash.

It takes about 30 minutes, and everyone can build their own fajitas at the table.

Quick Facts

• Prep time: 10 minutes
• Cook time: 20–25 minutes
• Total time: about 30–35 minutes
• Servings: 4 (about 8 fajitas)
• Difficulty: Easy
• Oven temperature: 425°F (220°C)

Ingredients

Homemade fajita seasoning

• 2 teaspoons chili powder
• 1 teaspoon ground cumin
• 1 teaspoon smoked paprika
• 1 teaspoon garlic powder
• ½ teaspoon onion powder
• ½ teaspoon dried oregano
• 1 teaspoon salt
• ¼ teaspoon black pepper
• Pinch of cayenne (optional)

Fajitas

• 1½ lb (680 g) boneless, skinless chicken breasts
• 3 bell peppers (different colors), sliced into ½-inch strips
• 1 large red or yellow onion, sliced into ½-inch strips
• 3 tablespoons olive oil
• 1 lime, juiced, plus wedges for serving
• 8 small flour or corn tortillas

Toppings

Sour cream or Greek yogurt, guacamole or sliced avocado, salsa, shredded cheese, chopped cilantro.

How to Make Them

1. Heat the oven. Preheat to 425°F (220°C). Line a large rimmed baking sheet with parchment paper or foil for easy cleanup.

2. Mix the seasoning. Stir all the seasoning ingredients together in a small bowl.

3. Slice the chicken thin. Cut the chicken into strips about ½ inch thick. Thin, even strips cook in the same time as the vegetables. If your breasts are very thick, slice them in half sideways first.

4. Season everything. Put the chicken, peppers and onion in a large bowl. Add the oil and seasoning. Toss with your hands until everything is coated.

5. Spread it out. Spread everything on the sheet pan in one layer. If it's crowded, use two pans. Crowded food steams instead of browning.

6. Roast. Roast for 20–25 minutes, stirring halfway, until the chicken reaches 165°F (74°C) and the vegetables are soft with browned edges.

7. Char (optional). For a sizzling, restaurant look, turn on the broiler for the last 2–3 minutes. Watch closely.

8. Add lime. Squeeze lime juice over everything right out of the oven.

9. Warm the tortillas. Wrap them in foil and put them in the oven for the last 5 minutes, or heat them one by one in a dry skillet for 20–30 seconds per side.

10. Serve. Fill tortillas with chicken and veggies and add your favorite toppings.

Tips

• Same size = same cook time. Slice peppers, onions and chicken to similar thickness.
• Use two pans if needed. Space is the secret to browning.
• Thighs stay juicier. Boneless thighs work great and are hard to dry out.
• Add lime at the end. Heat dulls fresh lime flavor.

Common Problems

The chicken is dry. It was sliced too thin or cooked too long. Check with a thermometer at 18 minutes.

The vegetables are watery. The pan was too crowded. Spread things out or use two pans.

No browned edges. Use the broiler for 2–3 minutes at the end.

It's bland. Add more salt and lime. Fajitas need both to taste bright.

Variations

• Steak fajitas: Use thinly sliced flank or skirt steak. Roast 12–15 minutes for medium.
• Shrimp fajitas: Roast the vegetables 12 minutes, then add shrimp for the last 6–8 minutes.
• Vegetarian: Use portobello mushrooms and black beans.
• Fajita bowls: Serve over rice with black beans and lettuce.
• Low carb: Use lettuce wraps instead of tortillas.

What to Serve With Them

Fajitas go well with cilantro lime rice, black beans, refried beans, Mexican street corn, or chips and salsa.

Storage and Reheating

Fridge: Store chicken and vegetables in an airtight container for 3–4 days. Keep tortillas and toppings separate.

Freezer: Freeze cooked chicken and vegetables for up to 3 months. The peppers will be softer after thawing.

Reheat: Warm in a hot skillet for 3–4 minutes, or microwave until hot (165°F / 74°C).

Nutrition Estimate

Per serving (2 fajitas with flour tortillas, no toppings):

• Calories: about 450
• Protein: about 40 g
• Carbohydrates: about 38 g
• Fat: about 15 g
• Fiber: about 5 g

FAQs

Can I use store-bought fajita seasoning?

Yes. Use about 2–3 tablespoons, and taste before adding extra salt.

Should I marinate the chicken?

It's not needed. If you have time, toss everything with the oil, seasoning and lime and refrigerate for up to 4 hours.

Corn or flour tortillas?

Both work. Flour tortillas are softer and more common for fajitas; corn tortillas are gluten-free.

Can I prep this ahead?

Yes. Slice everything and store it in the fridge for up to 1 day. Season and roast when ready.

More Recipes to Try

• Chipotle-Style Cilantro Lime Rice (coming soon)
• Easy Homemade Guacamole, Mild (coming soon)
• Authentic Mexican Street Tacos al Pastor (coming soon)
• Crockpot Chicken Tortilla Soup (coming soon)
• Browse all recipes

A Final Note

Thin, even slices and plenty of space on the pan are what make sheet pan fajitas taste like they came from a sizzling skillet. Set out the toppings and let everyone build their own.