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Blackened Mahi-Mahi

Butter and warm spices create a tasty, blackened crust for our blackened mahi-mahi. The fish is made perfect by searing it in the cast-iron skillet over high heat. Eat as is, or garnish with fresh mango salsa.

Blackened mahi-mahi served with lemon and chopped cilantro.

Blackened Mahi-Mahi

Tressa Jamil
Spice up your seafood with this blackened mahi-mahi recipe. Our homemade blacking seasoning adds incredible flavor to fish that's ready and on the table in under an hour!
Prep Time 15 mins
Cook Time 30 mins
Total Time 45 mins
Course Main Course
Cuisine American, Cajun, Creole
Servings 4
Calories 188 kcal

Equipment

  • Small Bowl
  • Cast-Iron Skillet or Heavy-Bottomed Pan

Ingredients
  

  • 5 Filet Mahi-Mahi, frozen
  • 1 tablespoon butter, melted
  • 2 tablespoons avocado oil
  • ½ cup blackening seasoning

Instructions
 

  • Salt the filets and let them sit for 5 minutes. Pat them dry with a towel to remove excess moisture.
  • Lightly coat the fillets with melted butter using a pastry brush.
  • Combine the ingredients for the blackening seasoning in a small bowl, and generously cover both sides of the fish.
  • Warm avocado oil in a cast-iron skillet or heavy-bottomed pan over medium heat until it begins to smoke.
  • Once heated, carefully add 1-2 filets to the pan to cook for 3-4 minutes on each side. Cooking time may vary depending on the thickness of the filet. Repeat with the remaining filets (see note).
  • Garnish with fresh lemon to serve.

Notes

  • The key to a well-seared fish is a well-coated, hot pan. Warm a cast-iron skillet on medium and give it time to heat up before cooking the fish. 
  • Speaking of hot; there could be a lot of smoke!! Do yourself a favor and turn on your exhaust fan. I often remember when it’s already too late. 
  • Mahi-mahi is versatile and cooks well, but it’s still a lean fish; if you overcook the filet it will dry out, and no one wants that. 
  • You will know the fish is finished searing on one side when it easily releases from the pan. If it sticks, it’s not quite ready. Give it more time. Use a food thermometer to check the temperature; the safe internal temperature for mahi-mahi is 137. ° 

Nutrition

Serving: 1 filletCalories: 188kcalCarbohydrates: 4gProtein: 22gFat: 9gSaturated Fat: 2gPolyunsaturated Fat: 1gMonounsaturated Fat: 5gCholesterol: 86mgSodium: 1133mgPotassium: 563mgFiber: 2gVitamin A: 262IUCalcium: 46mgIron: 2mg
Did you make this recipe? Let me know how it turned out for you! Leave a comment below and follow @thejamilghar or tag #thejamilghar on Instagram!

Check out our web story for pan-seared blackened mahi-mahi.

WHAT YOU NEED TO MAKE THIS RECIPE

  • Mahi-Mahi: I use frozen wild-caught mahi-mahi filets from Costco every time. However, if you have access to fresh fish go ahead and use that instead.
  • Butter: Use butter to bind the blackening seasoning and flavor the fish.
  • Blackening Seasoning: Blackening is a Cajun cooking technique used to prepare fish and other meat. Take a moment to check out our favorite blend of spices to use for blackening. A note on heat- if spice is a concern for you, I would consider omitting cayenne pepper from the spice blend.
Blackened seasoning used to top chicken, fish, and vegetables.

HOW TO MAKE BLACKENED MAHI-MAHI

mahi filets next to blackened seasoning

STEP 1

Salt the filets and let them sit for 5 minutes. Pat them dry with a towel to remove excess moisture.

butter mixture for mahi mahi

STEP 2

Lightly coat the fillets with melted butter using a pastry brush.

mahi filets coated in blackened seasoning

STEP 3

Combine the ingredients for the blackening seasoning in a small bowl, and generously cover both sides of the fish with the spices.

oil warming in cast-iron skillet

STEP 4

Warm avocado oil in a cast-iron skillet or heavy-bottomed pan over medium heat until it begins to smoke.

searing mahi in cast-iron skillet

STEP 5

Once heated, carefully add 1-2 filets to the pan to cook for 3-4 minutes on each side. Cooking time may vary depending on the thickness of the filet. Repeat with the remaining filets (see note).

searing mahi in cast-iron skillet

STEP 6

Garnish with fresh lemon to serve.

Searching for a tasty seafood recipe?

Try one of these favorites from the Jamil Ghar.

COMMON QUESTIONS ABOUT THIS RECIPE

How can I serve blackened mahi-mahi?

Oh, the options! Of course, you can always serve it with fresh mango salsa; that’s our personal favorite.

  • Break up the cooked fish and add it to a warmed corn tortilla to make blackened mahi-mahi tacos. Top them with our mango salsa or pico de gallo.
  • Serve the fish over rice, pilaf, or mix it with rice and black beans for a fun spin on a burrito bowl.
  • Blackened mahi-mahi is the perfect protein to add to a chopped salad!
  • Make a blackened mahi-mahi sandwich using avocado, cabbage, butter lettuce, and spicy mayo dressing served on ciabatta.
blackened mahi with mango salsa
Blackened Mahi-Mahi with Mango Salsa

What’s are some good sides to serve with this meal?

  • Rice or pilaf
  • Risotto
  • A bed of greens treated with olive oil, salt, and pepper.
  • Grilled vegetables like corn or asparagus
  • Red beans
  • A chopped salad
  • Serrano crema is a tasty sauce to pair with blackened mahi-mahi.

How do you cook mahi-mahi in the oven?

Prepare a rimmed baking sheet with a wire rack, and give it a quick spray with avocado oil. Line the fish onto the wire rack and bake at 375° for 8-10 minutes. To be certain, use a food thermometer to check the temperature of the fish; the safe internal temperature for mahi-mahi is 137°.

Recipe Rating




Kristine Corey

Monday 7th of March 2022

Love this recipe, will have to try the mango salsa too!

Tressa - Jamil Ghar Team

Sunday 13th of March 2022

Hey, thanks for commenting! You'll have to let us know what you think of the mango salsa when you're able to try it.