Easy Sheet Pan Chicken Fajitas Recipe

Name: Sheet Pan Chicken Fajitas
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Ingredients: 6 boneless; 1/2 teaspoon salt; 1 teaspoon garlic powder; 1 teaspoon smoked paprika — the smoky backbone of this recipe; regular paprika works (but smoked is worth it!); 1 teaspoon parsley flakes; 1/2 teaspoon ground black pepper; 4 tablespoons olive oil; 3 bell peppers (sliced into 1/2-inch strips — I use red, yellow, and orange for the sweetest flavor and prettiest pan); 1 large red onion (sliced into 1/4-inch strips — red onion turns sweet and jammy in the oven); 1 teaspoon salt; 1 teaspoon garlic powder; 1 teaspoon smoked paprika; 1 teaspoon parsley flakes; 4 tablespoons olive oil; Flour tortillas (warmed); Spicy mayonnaise — this is the move that makes these fajitas mine; the creamy heat with the smoky chicken is unreal; Fresh guacamole

If there's one dinner that proves my whole "good food doesn't have to be complicated" philosophy, it's these sheet pan fajitas. Juicy, smoky chicken thighs and sweet, caramelized peppers and onions — all roasted together on one pan, then piled into warm tortillas with spicy mayo and fresh guacamole. It feels like a whole event, but the oven does almost all of the work!

Here's my favorite part: only about 15 minutes of this recipe is hands-on. You season the chicken, slice your veggies while it marinates, spread everything on one pan, and bake. Start to finish, dinner is on the table in under an hour — and cleanup is basically just lifting off a sheet of parchment paper.

I've made these oven fajitas more times than I can count, and the one thing I'll never change is using boneless chicken thighs instead of the usual sliced chicken breast. Thighs stay unbelievably juicy at 400°F, and slicing them after baking (instead of before) means no dry, chewy strips — ever.

If you love sheet pan recipes, you are going to love my Honey Garlic Chicken Thighs, Chicken Parmesan Tenders & Bang Bang Chicken Skewers!

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What You'll Need to Make these Sheet Pan Chicken Fajitas
Instructions for Sheet Pan Chicken Fajitas
Sheet Pan Chicken Fajitas
FAQ's
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Food safety

What You'll Need to Make these Sheet Pan Chicken Fajitas

Chicken
Boneless Skinless Chicken Thighs
Bell Peppers
Red Onion
Salt & Pepper
Garlic powder
Smoked paprika powder
Parsley flakes
Olive oil
Tortillas
Mayonnaise
Fresh guacamole

See recipe card for quantities.

Instructions for Sheet Pan Chicken Fajitas

Marinate the Chicken.

Prep the veggies!

Bake at 400 for 30 minutes.

Assemble Fajitas!

Sheet Pan Chicken Fajitas

5 from 1 vote

These easy sheet pan fajitas are made with juicy chicken thighs, sweet roasted peppers, and one pan — just 15 minutes of hands-on prep!

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Prep Time 15

Cook Time 40

Total Time 55

Servings: 4 servings

Course: Main Course

Cuisine: American

Ingredients Equipment Method Notes

Ingredients

For the Chicken

6 boneless skinless chicken thighs — thighs are the secret to juicy fajitas; they stay tender at 400°F where breast strips dry out
½ teaspoon salt
1 teaspoon garlic powder
1 teaspoon smoked paprika — the smoky backbone of this recipe; regular paprika works but smoked is worth it!
1 teaspoon parsley flakes
½ teaspoon ground black pepper
4 tablespoons olive oil

For the Veggies

3 bell peppers sliced into ½-inch strips — I use red, yellow, and orange for the sweetest flavor and prettiest pan
1 large red onion sliced into ¼-inch strips — red onion turns sweet and jammy in the oven
1 teaspoon salt
1 teaspoon garlic powder
1 teaspoon smoked paprika
1 teaspoon parsley flakes
4 tablespoons olive oil

To Serve

Flour tortillas warmed
Spicy mayonnaise — this is the move that makes these fajitas mine; the creamy heat with the smoky chicken is unreal
Fresh guacamole

Equipment

Method

Preheat the Oven: Preheat your oven to 400°F (200°C). Line your largest rimmed baking sheet with parchment paper — this is what makes cleanup basically nonexistent.
Marinate the Chicken: In a bowl or a resealable plastic bag, combine the chicken thighs with the salt, garlic powder, smoked paprika, parsley flakes, black pepper, and olive oil. Massage everything together so every thigh is evenly coated, then let it marinate for at least 15 minutes while you prep the veggies. (WATCH VIDEO BELOW)
Prep the Veggies: Slice the bell peppers into ½-inch strips and the red onion into ¼-inch strips. In a separate bowl, toss them with the salt, garlic powder, smoked paprika, parsley flakes, and olive oil until every strip is glistening.
Assemble on the Sheet Pan: Spread the seasoned veggies and chicken evenly across the baking sheet in a single layer. Give everything room to breathe — a crowded pan steams instead of roasts, and we want those caramelized edges! (WATCH VIDEO BELOW)
Bake: Transfer the sheet pan to the oven and bake for 30 minutes covered with tinfoil, until the chicken is cooked through (165°F / 74°C on a thermometer) and the veggies are tender with lightly charred, caramelized edges. Broil uncovered at 450F for 10 more minutes!
Rest, Slice, and Serve: Let everything rest for a few minutes — this keeps the chicken juicy. Slice the thighs into strips, then pile everything into warm tortillas with a drizzle of spicy mayo and a big scoop of fresh guacamole. (WATCH VIDEO BELOW)
How I build mine: warm tortilla, a swipe of guacamole first (it anchors everything!), then chicken, then a tangle of those sweet roasted peppers and onions, and a generous zigzag of spicy mayo over the top. Set the whole sheet pan in the middle of the table and let everyone assemble their own — it's the easiest way to feed a crowd without cooking to order.

Give everything room. Use your largest sheet pan and keep everything in a single layer — a crowded pan traps steam, and steamed fajitas are sad fajitas. If it looks packed, split it across two pans

Keep the thighs whole. This is the tip I swear by. Whole thighs baste themselves in the oven and get sliced after baking — pre-sliced strips lose their juices before they ever hit the tortilla.

Marinate while you slice. The 20-minute marinade happens during veggie prep, so it adds zero extra time. Efficient and flavorful — my favorite combo!

Notes

Storage:

Fridge: Store leftovers in an airtight container for 3–4 days. The chicken and veggies can be stored together.
Reheat: A skillet over medium heat with a tiny drizzle of oil is best — it brings back those caramelized edges. The microwave (60–90 seconds) totally works for weekday lunches, too.
Freezer: Avoid freezing the cooked fajitas — the peppers and onions turn watery once thawed. If you want a freezer meal, freeze the raw, seasoned chicken and sliced veggies in a bag for up to 2 months, thaw overnight in the fridge, and bake as written.

Meal prep it! Double everything across two sheet pans on Sunday and you've got lunches sorted:

Fajita bowls — over rice with extra guac
Fajita wraps — rolled up tight for grab-and-go lunches

Tried this recipe?

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FAQ's

Can I use chicken breasts instead of thighs?

Yes, chicken breasts work — bake them whole for about 20–25 minutes and pull them at 165°F (74°C) so they don't dry out. I still recommend thighs, though! They stay juicier at this temperature and are far more forgiving if dinner runs a few minutes late.

Why are my sheet pan fajitas soggy?

Soggy fajitas almost always mean an overcrowded pan — spread everything in a single layer on your largest sheet pan so it roasts instead of steams. If your pan looks packed, split everything across two pans and rotate them halfway through baking.

Can I make sheet pan fajitas ahead of time?

Yes! Marinate the chicken and slice the veggies up to 24 hours ahead, stored separately in the fridge, then just assemble and bake when you're ready. Cooked leftovers keep for 3–4 days and make amazing fajita bowls.

Can I freeze sheet pan fajitas?

Freezing the cooked fajitas isn't recommended — peppers and onions turn watery once thawed. Instead, freeze the raw, seasoned chicken and sliced veggies together in a freezer bag for up to 2 months, thaw overnight, and bake as directed.

What temperature do you bake fajitas in the oven?

400°F (200°C) is the sweet spot — whole chicken thighs need about 30 minutes, which is exactly how long the peppers and onions take to turn tender with caramelized edges. If you use sliced chicken strips instead, start checking around the 15–20 minute mark.

What do you serve with sheet pan fajitas?

Warm flour tortillas, spicy mayo, and fresh guacamole are my go-to combo. They're also delicious over rice as fajita bowls, on top of a big salad, or in lettuce cups if you're keeping things lighter.

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