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blackened mahi mahi on a plate with kale and grilled corn on the cob

Blackened Mahi Mahi

Blackened mahi mahi is a fast and flavorful main dish that is perfect for weeknight family dinners.

Course Main Course
Cuisine American
Keyword blackened mahi mahi, blackened mahi mahi recipe
Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Servings 4 filets
Calories 209 kcal
Author Marjorie @APinchOfHealthy


  • 4 mahi mahi filets - about 6 ounces each
  • 1 teaspoon garlic powder
  • 1 teaspoon onion powder
  • 1 teaspoon paprika
  • 1 teaspoon oregano
  • 1 teaspoon chili powder
  • 1 teaspoon kosher salt
  • ½ teaspoon ground black pepper
  • 1 tablespoon butter
  • 1 tablespoon olive oil
  • juice of 1 lemon


  1. Prep the fish. Place the fish onto a clean plate and lightly pat it with a clean paper towel
  2. Make the spice blend. Combine the garlic powder, onion powder, paprika, oregano, chili powder, salt and pepper in a small bowl and mix to combine.
  3. Season the fish. Liberally season both sides of each filet with the spice blend.
  4. Cook. Place a cast iron pan over medium-high heat and add butter and oil. Once the butter and oil is nice and hot, add the seasoned fish in a single layer into the bottom of the pan. If your pan is too small to fit all four filets, then do this in batches.

  5. Cook, for several minutes, until golden brown on one side. Try not to touch them as they cook. Use a fish spatula or metal spatula to carefully flip the fish over and continue to cook until opaque and completely cooked through, about 3-4 minutes.

  6. Serve. Squeeze lemon juice over the fish, sprinkle with some dried parsley and serve.

Recipe Notes

  • Nutritional information is approximate and was calculated using a recipe nutrition label generator.

  • I recommend using mahi mahi that is at least 6 ounces in size.
  • I highly recommend fresh (never frozen) if you can get it. Otherwise, frozen and thawed will work just fine.
  • Make sure to season each side of the fish for the best flavor.
  • You can mix up the spices and use a cajun spice blend or even a Montreal spice blend.
  • This fish stores great for up to 2 days in an airtight container in the refrigerator.
    Coconut oil can be used in place of the olive oil and ghee can be used in place of the butter if needed.
Nutrition Facts
Blackened Mahi Mahi
Amount Per Serving
Calories 209 Calories from Fat 72
% Daily Value*
Fat 8g12%
Saturated Fat 3g19%
Trans Fat 1g
Polyunsaturated Fat 1g
Monounsaturated Fat 4g
Cholesterol 132mg44%
Sodium 766mg33%
Potassium 753mg22%
Carbohydrates 2g1%
Fiber 1g4%
Sugar 1g1%
Protein 32g64%
Vitamin A 798IU16%
Vitamin C 1mg1%
Calcium 41mg4%
Iron 2mg11%
* Percent Daily Values are based on a 2000 calorie diet.