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A blend of spices makes this Blackened Mahi Mahi so delicious. Add flavor to this white fish for a quick and easy dinner idea.

Cooked Mahi Mahi on a cutting board with lemon wedges
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My loves when I make this delicious seafood recipe. The delicious blackened seasoning takes our favorite white fish to the next level. The best part is that we made the blackened seasoning from scratch so we can adjust for flavor.

Make sure to check out the Blackened Tilapia Recipe for another easy weeknight dinner idea and easy low carb recipes.

What is Mahi Mahi?

Mahi Mahi is known as the dolphin fish. It is mild in flavor and has a soft texture. The options are endless on the spices that can be added to this delicious fish.

This recipe is prepared in a skillet but you can also make grilled mahi mahi or if you have one make Blackstone Blackened Mahi Mahi. Add your favorite side dish for a complete meal idea.

Ingredients

Blackened Mahi Mahi ingredients - mahi mahi filets, avocado oil, onion powder, garlic powder, cayenne pepper, oregano, salt, paprika

Scroll to the bottom of the post to see the full recipe and ingredients in the recipe card.

Variations Ideas

There are many different spice blend that work great with this blackened fish recipe. Here are some additions or substitutes spices that you must try.

  • Dried Thyme
  • Cajun Seasoning
  • Black Pepper
  • Smoked Paprika

Step by Step Instructions

Combining the seasoning in a bowl with a spoon

Step 1 – Mix together the seasonings in a small bowl which includes garlic powder onion powder. Place the mahi mahi fillets on a plate.  

Drizzling oil on fresh mahi mahi

Step 2 – Rub 1 tablespoon of the avocado oil onto both sides of the fillets.

Placing seasoning on Mahi Mahi

Step 3 – Then spoon the seasoning blend over the mahi mahi and spread it around. Make sure to season both sides of the fish.  I use approximately ½ tablespoon per fillet.

Placing seasoned mahi mahi in a cast iron skillet

Step 4 – Heat the remaining avocado oil over medium high heat in a cast iron skillet. Place the mahi mahi fillets on the hot cast iron skillet on top of the oil.  Let them cook for 2 minutes.  Time them and do not move the fish during this cooking day so that the fish will get blackened.

  • Step 5 – Then flip the mahi mahi fillets and cook for another 2-3 minutes until the mahi mahi reaches an internal temperature of 145 degrees F. The mahi mahi should flakes easily.
  • Step 6 – Remove the mahi mahi from the pan and allow it to sit for 5 minutes on a paper towel.  Serve warm and enjoy!

Recipe Tips

  • Meat Thermometer – Use an instant-read meat thermometer to make sure that the mahi mahi is cooked to a safe temperature before removing it from the grill.  The fish should flakes with a fork when finished cooking.
  • Oil – You can use any oil with a high smoke point for this recipe instead of avocado oil.  Vegetable oil, Canola oil and Coconut oil would all work great for this recipe.  
  • Adding Seasoning Mix – After combining the ingredients, make sure to season both sides of the mahi mahi. This helps to give this fish amazing flavor.
  • Skillet – We recommend using a cast iron skillet in this recipe. It helps give the fish amazing texture while keep the center soft and tender.

Serving Suggestions

This blackened mahi mahi is delicious with many different side dish recipes. We love to serve it with a side of white rice topped with, cilantro, mango salsa and fresh lemon juice or lime wedges.

We have even diced up the fish fillets and made mahi-mahi tacos topped in corn tortillas. Fish tacos are a family favorite and even better made with this blackened mahi mahi.

Feel free to also use this blackened seasoning with other types of fish such as snapper or grouper.

Cooked Blackened Mahi Mahi stacked on a cutting board

Frequently Asked Questions

How to Store Leftovers

Refrigerate the leftovers in an airtight container for up to 3 days. 

How to Reheat

We recommend reheating in the oven at a low temperature in a baking dish. It will take less than 5 minutes to reheat. Make sure to not overheat as it could dry out quickly.

Blackened Mahi Mahi on white rice on a plate

More Easy Blackened Recipes

We love hearing from you. If you make this Blackened Mahi Mahi Recipe, please make sure to leave us a comment or a star review.

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Blackened Mahi Mahi

5 from 2 votes
A blend of spices makes this Blackened Mahi Mahi so delicious. Add flavor to this white fish for a quick and easy dinner idea.
Prep Time 10 minutes
Cook Time 5 minutes
Let Sit 5 minutes
Total Time 20 minutes
Servings 6
Cuisine American
Course Main Course
Calories 189

Ingredients

  • 6 Mahi Mahi Fillets skin removed
  • 2 Tablespoons Avocado Oil divided
  • ½ teaspoon Onion Powder
  • ½ teaspoon Garlic Powder
  • ¼ teaspoon Cayenne Pepper
  • ¼ teaspoon Oregano
  • ½ teaspoon Salt
  • 1 teaspoon Paprika

Instructions

  • Mix together the seasonings in a small mixing bowl.  Place the mahi mahi fillets on a plate.
  • Rub 1 tablespoon of the avocado oil onto both sides of the fillets.
  • Then spoon the seasoning mixture over the mahi mahi and spread it around. Make sure to season both sides of the fish.  I use approximately ½ tablespoon per fillet.
  • Heat the remaining avocado oil over high heat in a cast iron skillet.
  • Place the mahi mahi fillets on the hot cast iron skillet on top of the oil.  Let them cook for 2 minutes.  Time them and do not move the fish during this cooking day so that the fish will get blackened.
  • Then flip the mahi mahi fillets and cook for another 2-3 minutes until the mahi mahi reaches an internal temperature of 145 degrees F.
  • Remove the mahi mahi from the pan and allow it to sit for 5 minutes.  Serve warm and enjoy!

Recipe Notes

Refrigerate the leftovers in an airtight container for up to 3 days. 
Use an instant-read meat thermometer to make sure that the mahi mahi is cooked to a safe temperature before removing it from the grill.  
You can use any oil with a high smoke point for this recipe instead of avocado oil.  Vegetable oil, Canola oil and Coconut oil would all work great for this recipe.

Nutrition Facts

Calories 189kcal, Carbohydrates 1g, Protein 32g, Fat 6g, Saturated Fat 1g, Polyunsaturated Fat 1g, Monounsaturated Fat 4g, Cholesterol 124mg, Sodium 344mg, Potassium 722mg, Fiber 0.2g, Sugar 0.1g, Vitamin A 506IU, Vitamin C 0.1mg, Calcium 29mg, Iron 2mg

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About the Author

Hi, I’m Carrie. Welcome to Eating on a Dime!

I’m on a mission to help you cook delicious meals without busting your budget. Together we are going to cook real food… for real families!

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