Sheet-Pan Chicken Fajitas

Fajitas centre on tender strips of seasoned meat and vegetables served with warm tortillas, ready to fill at the table. In this sheet-pan version, chicken breast, peppers and red onion roast together so the edges catch and caramelise while the meat stays juicy. Smoked paprika, cumin, oregano and garlic give the tray a savoury, lightly smoky flavour, with lime added at the end for freshness. It is a practical weeknight take on a familiar sharing meal: colourful, flexible, easy to scale, and much less hands-on than cooking everything in batches on the hob.
Cuisine style Tex-Mex-style family dinner
Cooking style Minimal cleanup • Crowd-friendly
Time commitment Under 1 hour

Why this recipe works

  • One-tray efficiency: Chicken and vegetables roast together on a hot baking tray, keeping the method simple and the washing up low.
  • Smoky fajita flavour: Smoked paprika, cumin, oregano and garlic coat the chicken and vegetables before roasting, so the seasoning cooks into every piece.
  • Fresh finish: Lime added after roasting brightens the smoky seasoning and balances the richness of the chicken and oil.

Get the most out of this recipe

Common mistakes

  • Avoid crowding the tray: Spread the chicken and vegetables in a single layer so they roast rather than steam; use two trays if needed.
  • Watch the chicken: Chicken breast cooks quickly in strips, so check towards the end of roasting and stop once it is cooked through.
  • Add lime at the end: Squeezing lime over the hot tray after roasting keeps the citrus flavour fresh instead of dulling in the oven.

Ingredient swaps

  • Use chicken thighs: Boneless, skinless chicken thighs can replace breast for a juicier result; roast a little longer until fully cooked.
  • Swap the citrus: Lemon can stand in for lime if needed, giving a softer, less sharp finish.

Make-ahead tips

  • Good for meal prep: Cool the cooked chicken and vegetables quickly, then refrigerate in a sealed container for up to 3 days.
  • Reheat separately from tortillas: Reheat the filling on a baking tray at 200°C (390°F) until piping hot, or warm it in a frying pan; heat the tortillas separately so they stay pliable.
  • Freeze the filling only: The chicken and vegetables can be frozen for up to 2 months, but tortillas are best kept separate and warmed fresh.

Serving ideas

  • Add fresh toppings: Serve with coriander, sliced avocado, shredded lettuce, salsa or a spoonful of soured cream for contrast.
  • Make it a fuller meal: Pair with rice, black beans, corn salad or a simple tomato salsa alongside the warm tortillas.

Equipment you'll need

Ingredients
Instructions
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  1. Heat the oven to 220°C (430°F) and put a large baking tray in to heat up. In a mixing bowl, stir together the olive oil, smoked paprika, ground cumin and dried oregano. Finely grate or crush the garlic into the bowl and mix well.
  2. Slice the chicken into strips, then add to the bowl and toss to coat. Slice the red pepper and yellow pepper into strips and cut the red onion into wedges, then add them to the bowl and toss again until everything is evenly seasoned.
  3. Carefully tip the chicken and vegetables onto the hot tray and spread into a single layer. Roast for 18 to 22 minutes, turning once halfway, until the chicken is cooked through and the peppers are lightly charred at the edges. If you want more colour, give it 2 to 3 minutes more at the end.
  4. Cut the lime in half and squeeze it over the tray, then toss everything together. Warm the flour tortillas in the oven for 2 to 3 minutes, just until soft and pliable. Serve the chicken and vegetables with the warm tortillas.

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Recipe notes

Tips

  • For the best char, make sure the chicken and vegetables are in a single layer with a little space between pieces; if crowded, use two trays.
  • If serving anyone vulnerable, ensure the chicken is piping hot all the way through with no pink in the thickest pieces.

Substitutions

  • Replace the chicken breast with chicken thighs boneless skinless for a juicier result; roast for a few minutes longer until cooked through.
  • Replace the lime with lemon for a slightly softer, less sharp citrus finish.

Storage

  • Refrigerate up to 3 days
  • Cool the chicken and vegetables quickly, then refrigerate in a sealed container for up to 3 days. Reheat on a baking tray at 200°C (390°F) for 10 to 12 minutes until piping hot, or in a frying pan over medium heat; warm the flour tortillas separately. Freeze the chicken and vegetables (not the tortillas) for up to 2 months and defrost overnight in the fridge before reheating.

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Sheet-Pan Chicken Fajitas
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Recipe overview

  • Servings: 4 servings
  • Total time: 40min (15min active)
  • Difficulty: Easy
  • Cuisine: Mexican
  • Allergens:
    Gluten Wheat
Beginner friendly Freezer friendly Kid friendly

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