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Home » Main Dish » Oven-Baked Blackened Mahi Mahi

Oven-Baked Blackened Mahi Mahi

LAST UPDATED: February 6, 2021 • FIRST PUBLISHED: January 14, 2020 • 13 Comments

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Oven-baked blackened Mahi Mahi is a delicious sheet pan dinner recipe that’s super easy to bake. The fresh Mahi Mahi fillets cook up nice and flaky with a tasty homemade blackening spice mix; no need for high heat or smoky kitchens! You’ll find this Mahi Mahi recipe and more in our Mahi Mahi Recipes collection.

a fillet of blackened mahi mahi on a white plate

Blackened Mahi Mahi has incredible flavor! You can eat it alone, or use it in blackened Mahi Mahi tacos. But, knowing how to easily blacken Mahi can sometimes be challenging. For example, in my tutorial How to Blacken Mahi Mahi, I walk you through step-by-step on how to blacken Mahi using high heat and a cast iron skillet. This method ensures you get a nice crispy blackened crust, however, it can also leave you with a smoky kitchen!

If you aren’t comfortable cooking with cast iron, or do not own any cast iron skillets, that tutorial wouldn’t work for you. But, you can blacken Mahi Mahi using just a simple sheet pan and your oven! This recipe will walk you through how to easily blacken Mahi in the oven

Ingredients needed

  • 4 Mahi Mahi fillets – thawed
  • 3 Tbsp. olive oil
  • 1 tsp. garlic powder
  • 1 tsp. oregano
  • 1/2 tsp. cayenne pepper
  • 1 tsp. smoked paprika
  • 1 tsp. onion powder
  • 1 tsp. cumin
  • 1/2 tsp. black pepper
  • 1/2 tsp. salt
blackening spices in a white bowl

How to blacken Mahi Mahi

  • raw mahi mahi fillets on a foil lined sheet pan
  • raw mahi mahi fillets coated in blackened seasoning
  1. Preheat oven to 450 degrees F.
  2. Line a sheet pan with foil and coat with 3 Tbsp. of olive oil.
  3. Lay the thawed Mahi Mahi fillets onto the oil.
  4. In a small bowl, combine the blackening spices and mix to combine.
  5. Thoroughly coat both sides of the Mahi Mahi fillets with the seasoning mixture.
  6. Bake for 10-12 minutes or until flaky, and the internal temperature reaches 137 degrees F.
  7. Remove from oven and serve immediately. Serve with your favorite aioli, like this roasted chili aioli, or remoulade sauce.
blackened mahi mahi fillet on a white plate

Recipe FAQs and Variations

Is blackened fish burnt?

No! It may look burnt, but the blackened color is actually the charred spices combined with the cooking oil.

Is blackened seasoning hot?

This blackened seasoning in particular does carry a little kick of heat, but it’s not intolerable.

Will blackened Mahi Mahi get crispy in the oven?

While you’ll still get the delicious flavors of blackened Mahi in the oven, you won’t get a crispy outside crust when oven-baking. To get that crust, you’ll need to pan sear, which I show you how to do in my how to blacken Mahi Mahi tutorial.

a blackened mahi mahi fillet with a bite cut out with a fork on a white plate

Cooking Mahi Mahi just got easy!

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    Wanderlust and Wellness participates in the Amazon affiliate program. Please see my affiliate disclaimer. As an Amazon Associate, I earn from qualifying purchases.

    Having a good quality sheet pan is such an important kitchen essential. I also like to keep an instant read thermometer on hand for food cook-temp safety. You can also make a large batch of the blackening seasoning and store in one of these reusable spice jars.

    Make it a meal with these additional recipes!

    Make it a full meal by adding these recipes to your menu – Easy air fryer roasted potatoes are a super easy side dish that can cook up in the air fryer while the Mahi Mahi is cooking in the oven. Or, if you want a lighter side dish, the sweet and spicy mix in this spicy cucumber salad recipe would pair deliciously with the blackened seasoning. Then top it off with this easy make-ahead dessert – vanilla panna cotta with white wine sauce. And, if you’re hosting guests, treat them to a La Croix Paloma or Easy Berry Mojito!

    Blackened Mahi Mahi Recipe

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    a blackened mahi mahi fillet with a bite cut out with a fork on a white plate

    Blackened Mahi Mahi


    • Author: Jennifer
    • Prep Time: 5
    • Cook Time: 12
    • Total Time: 17 minutes
    • Yield: 4 1x
    Print Recipe
    Pin Recipe

    Description

    Oven-baked blackened Mahi Mahi is a delicious sheet pan dinner recipe that’s super easy to bake. The fresh Mahi Mahi fillets cook up nice and flaky with a tasty homemade blackening spice mix; no need for high heat or smoky kitchens!


    Ingredients

    Scale
    • 4 Mahi Mahi fillets – thawed
    • 3 Tbsp. olive oil
    • 1 tsp. garlic powder
    • 1 tsp. oregano
    • 1/2 tsp. cayenne pepper
    • 1 tsp. smoked paprika
    • 1 tsp. onion powder
    • 1 tsp. cumin
    • 1/2 tsp. black pepper
    • 1/2 tsp. salt

    Instructions

    1. Preheat oven to 450 degrees F.
    2. Line a sheet pan with foil and coat with 3 Tbsp. of olive oil.
    3. Lay the thawed Mahi Mahi fillets onto the oil.
    4. In a small bowl, combine the blackening spices and mix to combine.
    5. Thoroughly coat both sides of the Mahi Mahi fillets with the seasoning mixture.
    6. Bake for 10-12 minutes or until flaky, and the internal temperature reaches 137 degrees F.
    7. Remove from oven and serve immediately. Serve with your favorite aioli, like this roasted chili aioli, or remoulade sauce.

    Notes

    • If you want to get a crispy outside crust, follow my how to blacken Mahi Mahi tutorial using a cast-iron skillet.
    • Oven-baked blackened Mahi Mahi will still have that same delicious blackened Mahi flavor!
    • Nutritional Disclaimer
    • Category: main dish, dinner
    • Cuisine: American

    Keywords: mahi mahi, blackened mahi mahi, blackened mahi mahi recipe, oven-baked mahi mahi

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    Jennifer

    Jennifer is the recipe developer and food photographer behind Wanderlust and Wellness since 2016. She creates easy, approachable gluten-free recipes for the everyday home cook; because cooking gluten-free doesn’t mean food has to be complicated or tasteless.

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    Comments

    1. Kim

      April 04, 2022 at 10:53 pm

      Made this for dinner along with the aioli. My family, including three teens, loved it! It was SUPER quick and easy, and only called for ingredients I already had. It’s a new family favorite! Thank you for making dinner easy and delicious.

      Reply
    2. Helen Pietchel

      January 15, 2022 at 8:17 am

      Loved it! My husband said it was better than a restaurant! Very tasty!

      Reply
    3. Linda Primmer

      April 18, 2021 at 9:17 am

      This looks amazing! Thanks for sharing. i am happy to feature your Blackened Mahi Mahi on Sunday at Love Your Creativity.

      Reply
    4. PatO

      October 28, 2020 at 2:23 pm

      Very tasty. I did not prepare either of the sauces but still was a good recipe.Pat

      Reply
    5. SandyG

      October 26, 2020 at 6:38 pm

      The spices never got dark but the fish tasted good so it was a win.

      Reply
    6. Rose

      July 31, 2020 at 7:28 pm

      Are we coating both sides in the olive oil before applying the seasoning, or just one side?

      Reply
      • Jennifer

        August 30, 2020 at 9:03 pm

        Thank you for catching that, it’s been fixed within the recipe.

        Reply
        • Bee

          March 02, 2021 at 6:24 pm

          I don’t see it anywhere in the recipe, do we or do we not coat both sides with oil first?

        • Jennifer

          March 13, 2021 at 10:56 am

          Yes, you would.

    7. Siobhan

      June 07, 2020 at 3:26 pm

      Can I grill this?

      Reply
      • Jennifer

        June 11, 2020 at 8:56 am

        Yes! Once you have the blackened seasoning on, you can follow these directions for grilled Mahi. https://wanderlustandwellness.org/grilled-mahi-mahi-recipe/

        Reply
    8. Stefanie

      May 26, 2020 at 8:08 pm

      This was AMAZING! Seriously better than what I’ve had in restaurants. I made your red chili aoli and it was to die for!! This will go in my weekly rotation! Thank
      You

      Reply
      • Jennifer

        May 27, 2020 at 8:16 am

        So happy to hear this! Glad you enjoyed it and thank you for the review!

        Reply

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