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Preheat your oven to 400°F. Line a large, rimmed sheet pan with parchment paper for easier cleanup.

In a large mixing bowl, combine the chili powder, ground cumin, smoked paprika, garlic powder, onion powder, dried oregano, salt, and black pepper. Whisk briefly to combine the spices.

Add the sliced chicken breast, bell peppers, and red onion to the bowl with the spices. Drizzle with olive oil. Toss everything thoroughly with your hands or tongs until the chicken and vegetables are evenly coated with the seasoning.

Spread the seasoned chicken and vegetable mixture in a single layer on the prepared sheet pan. Ensure there's enough space for even cooking; use two sheet pans if necessary to avoid overcrowding.

Bake for 20-25 minutes, stirring the mixture halfway through, until the chicken is cooked through (no longer pink inside) and the vegetables are tender-crisp and slightly charred at the edges.

While the fajitas are baking, warm the flour tortillas according to package directions. This can be done in a microwave, oven, or a dry skillet.

Carefully remove the sheet pan from the oven. Garnish the fajita mixture with fresh chopped cilantro.

Serve the chicken fajitas immediately with the warm tortillas, sliced or diced avocado, lime wedges for squeezing, and a dollop of sour cream if desired.


Preheat your oven to 400°F. Line a large, rimmed sheet pan with parchment paper for easier cleanup.

In a large mixing bowl, combine the chili powder, ground cumin, smoked paprika, garlic powder, onion powder, dried oregano, salt, and black pepper. Whisk briefly to combine the spices.

Add the sliced chicken breast, bell peppers, and red onion to the bowl with the spices. Drizzle with olive oil. Toss everything thoroughly with your hands or tongs until the chicken and vegetables are evenly coated with the seasoning.

Spread the seasoned chicken and vegetable mixture in a single layer on the prepared sheet pan. Ensure there's enough space for even cooking; use two sheet pans if necessary to avoid overcrowding.

Bake for 20-25 minutes, stirring the mixture halfway through, until the chicken is cooked through (no longer pink inside) and the vegetables are tender-crisp and slightly charred at the edges.

While the fajitas are baking, warm the flour tortillas according to package directions. This can be done in a microwave, oven, or a dry skillet.

Carefully remove the sheet pan from the oven. Garnish the fajita mixture with fresh chopped cilantro.

Serve the chicken fajitas immediately with the warm tortillas, sliced or diced avocado, lime wedges for squeezing, and a dollop of sour cream if desired.
