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Easy Sheet Pan Shrimp Fajitas Recipe with Peppers and Onions for Perfect Dinner

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A quick and easy sheet pan shrimp fajitas recipe featuring tender shrimp, colorful bell peppers, and sweet onions roasted together for a flavorful, no-fuss weeknight dinner.

Ingredients

Scale
  • 1 lb (450 g) medium shrimp, peeled and deveined (wild-caught if possible)
  • 2 tbsp olive oil
  • 2 tsp chili powder
  • 1 tsp smoked paprika
  • 1 tsp ground cumin
  • 1/2 tsp garlic powder
  • 1/4 tsp cayenne pepper (optional)
  • Juice of 1 lime
  • Salt and black pepper to taste
  • 1 large red bell pepper, thinly sliced
  • 1 large yellow bell pepper, thinly sliced
  • 1 large green bell pepper, thinly sliced (or swap with poblano)
  • 1 large onion, thinly sliced (yellow or sweet onion)
  • Flour or corn tortillas (soft and warm)
  • Fresh cilantro, chopped (optional)
  • Avocado slices or guacamole
  • Sour cream or Greek yogurt
  • Shredded cheese like Monterey Jack or cheddar (optional)

Instructions

  1. Preheat your oven to 425°F (220°C).
  2. In a large bowl, combine olive oil, chili powder, smoked paprika, cumin, garlic powder, cayenne pepper, lime juice, salt, and black pepper. Whisk together until smooth.
  3. Add the shrimp to the marinade and toss to coat evenly. Let it sit for 5-10 minutes while you prep the veggies.
  4. Slice the bell peppers and onions into thin strips, about 1/4 inch (6 mm) thick.
  5. Spread the peppers and onions in a single layer on a rimmed sheet pan. Drizzle with a little olive oil and sprinkle with salt and pepper. Toss to coat evenly.
  6. Roast the veggies in the oven for 10 minutes.
  7. Remove the pan from the oven and add the marinated shrimp on top of the veggies, spreading them out so they’re not crowded.
  8. Return the pan to the oven and roast for another 8-10 minutes, or until the shrimp turn pink and opaque and the veggies are tender with browned edges.
  9. Check for doneness: shrimp should be firm but not rubbery, veggies should have a slight char but still hold some bite.
  10. Remove the sheet pan from the oven and let it rest for a few minutes. Warm your tortillas in the oven or on a skillet while you do this.
  11. Assemble your fajitas by spooning shrimp and veggies onto tortillas, garnish with chopped cilantro, avocado slices, sour cream, and cheese if desired.
  12. Enjoy immediately for best flavor and texture.

Notes

Do not marinate shrimp for too long to avoid ‘cooking’ them with lime juice. Toss veggies halfway through roasting for even cooking. Tent pan with foil if shrimp cook too quickly or veggies need more time. Warm tortillas separately to prevent sogginess. Leftovers keep well refrigerated for up to 2 days; reheat in oven to preserve texture.

Nutrition

Keywords: shrimp fajitas, sheet pan recipe, easy dinner, weeknight meal, bell peppers, onions, roasted shrimp, quick fajitas