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Blackened Mahi Mahi with Mango Salsa

Blackened mahi mahi with mango salsa pairs deeply browned, spice-coated fillets with a bright, fresh mango topping. The fish cooks in a hot cast-iron skillet and is served with chilled salsa.
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Prep Time 15 minutes
Cook Time 19 minutes
Chill time 15 minutes
Total Time 49 minutes
Servings: 4 servings
Course: Dinner
Cuisine: American
Calories: 290
Ingredients Equipment Method Notes

Ingredients
  

For the mango salsa
  • 1 mango ripe, peeled and diced
  • 0.25 cup red onion finely diced
  • 1 jalapeño seeded and minced
  • 2 tbsp fresh cilantro chopped
  • 1 tbsp lime juice
  • 0.125 tsp salt
For the mahi mahi
  • 1 tsp paprika
  • 0.5 tsp cayenne pepper
  • 0.5 tsp garlic powder
  • 0.5 tsp onion powder
  • 0.5 tsp thyme dried
  • 0.5 tsp oregano dried
  • 0.75 tsp kosher salt
  • 0.5 tsp black pepper
  • 4 fillets mahi-mahi 6-ounce, about 1 inch thick
  • 2 tbsp unsalted butter melted
  • 1 tbsp canola oil

Equipment

  • 1 12-inch cast-iron skillet

Method
 

Make the salsa
  1. Stir together the mango, red onion, jalapeño, cilantro, lime juice, and salt in a small bowl.
  2. Cover and refrigerate for at least 15 minutes.
Season the fish
  1. Stir together the paprika, cayenne, garlic powder, onion powder, thyme, oregano, kosher salt, and black pepper in a small bowl.
  2. Pat the mahi-mahi dry.
  3. Brush both sides of each fillet with the melted butter.
  4. Coat both sides evenly with the spice mixture.
Cook the fish
  1. Heat a 12-inch cast-iron skillet over medium-high heat until very hot, about 3 minutes.
  2. Add 1/2 tablespoon of the canola oil and swirl to coat the pan.
  3. Cook 2 fillets for 3 to 4 minutes per side, until deeply browned and the thickest part reaches 145°F.
  4. Add the remaining 1/2 tablespoon oil.
  5. Cook the remaining 2 fillets the same way and serve with the mango salsa.

Notes

For the deepest browning, make sure the skillet is very hot before adding the fish. Refrigerate leftovers for up to 2 days; freezing is not recommended. For a dairy-free option, use olive oil instead of the butter.