Sheet Pan Chicken Fajitas: A Flavorful One-Pan Dinner You’ll Love

Ingredients

• 680 g (1.5 lb)chicken breast, thinly sliced
• 3bell peppers (red, yellow and green), sliced
• 1red onion, sliced
• 45 ml (3 tbsp)olive oil
• 2 clovesgarlic, minced
• 5 ml (1 tsp)chilli powder
• 5 ml (1 tsp)smoked paprika
• 5 ml (1 tsp)cumin
• 2.5 ml (½ tsp)oregano
• 1lime, juiced
• to tastesalt and pepper
• 8small flour tortillas
• to tastetoppings: sour cream, salsa, grated cheese and guacamole

Instructions

1. 1

   Heat the oven

   Preheat the oven to 220°C (425°F).

2. 2

   Mix the marinade

   In a large bowl, combine the olive oil, lime juice, garlic and spices.

3. 3

   Marinate the chicken

   Add the chicken strips to the bowl and leave them to marinate for 30 minutes.

4. 4

   Arrange the tray

   Put the chicken, peppers and onion on a sheet pan.

5. 5

   Roast until done

   Roast for 20–25 minutes, until the chicken is cooked through and the vegetables are caramelised.

6. 6

   Serve with toppings

   Serve hot with warmed tortillas and the toppings.

What are chicken fajitas?

Fajitas are a Tex-Mex favourite built around seasoned strips of meat and vegetables, usually served with tortillas so diners can make their own wraps. This version uses chicken, peppers and onion, bringing the filling together on one tray.

The lime and spices add brightness and warmth, while roasting gives the vegetables browned edges. The result is a simple, customisable dinner rather than a separately cooked filling and side.

Nutrition and macros by portion

The nutrition label shows one serving as written: 280 calories, 23g protein, 28g carbs, 9g fat.

The chicken provides most of the protein, while the tortillas and vegetables contribute carbohydrates. Olive oil and optional cheese, sour cream or guacamole add fat, so the toppings can change the balance of a serving. Add salad or extra peppers and onion alongside the fajitas for more vegetables on the plate.

Why the seasoning works

Cumin, chilli powder and smoked paprika give the chicken a savoury, gently smoky flavour. Garlic deepens the seasoning, and lime juice brings a tart note to balance it.

Olive oil helps coat the chicken and vegetables with the seasonings. Mix everything thoroughly so the flavours are spread across the chicken before it goes into the oven.

Getting the chicken ready

Even strips: Slice the chicken thinly and as evenly as you can so the pieces cook at a similar rate.

Marinating time: The recipe calls for 30 minutes in the bowl with the oil, lime, garlic and spices. Keep the chicken in that mixture until you are ready to arrange the tray.

Roasting for good texture

Spread: Arrange the chicken, peppers and onion across the sheet pan rather than leaving them piled together. This gives the vegetables room to roast and brown.

Doneness: Roast for 20–25 minutes. Check that the chicken is cooked through and look for caramelised edges on the vegetables before serving.

Make serving easy

Warm the tortillas shortly before eating so they are pliable enough to fold around the filling. Put the sour cream, salsa, grated cheese and guacamole on the table for people to add as they like.

For a fuller meal, serve the fajitas with rice or beans. A crisp salad or extra lime wedges can add freshness alongside the warm filling.

Keep the tray moving

The 30-minute marinating period is included in the stated 40-minute total time only if other preparation is done during that wait. Have the peppers and onion sliced while the chicken marinates.

Once the tray is in the oven, prepare the toppings and warm the tortillas towards the end of roasting. That way, the chicken and vegetables can be served hot.

Recipe notes & tips

• Slice the chicken into similarly sized strips for more even cooking.
• Cut the peppers and onion into pieces that will roast in the same time as the thin chicken strips.
• Spread the ingredients across the sheet pan rather than stacking them.
• Prepare the toppings while the chicken marinates to make serving quicker.
• Warm the tortillas just before serving so they are easier to fold.

Variations

• Change the peppers: Use any mix of red, yellow and green peppers you have.
• Adjust the heat: Add more or less chilli powder to suit your preference.
• Add beans: Serve black or pinto beans on the side for a heartier meal.
• Swap the protein: Try thin strips of turkey in place of the chicken, checking that they are cooked through.
• Go dairy-free: Leave out the sour cream and cheese, and serve with salsa and guacamole.

Common mistakes to avoid

• Crowding the tray: Piled ingredients can soften rather than brown; spread them out across the pan.
• Uneven chicken strips: Thick pieces may take longer than thin ones; slice the breast into evenly sized strips.
• Skipping the marinade: The chicken needs the stated 30 minutes in the seasoned mixture; allow for that before roasting.
• Guessing doneness from colour alone: Check that the chicken is cooked through before serving.
• Warming tortillas too early: They can cool before the filling is ready; warm them near the end of roasting.

How to store

Refrigerate leftover chicken and vegetables in an airtight container for up to 3 days. Reheat until hot throughout in the oven or a pan, and warm the tortillas separately; store toppings separately where possible.

Frequently asked questions