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Blackened Mahi Mahi

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Spice up your seafood with our blackened Mahi Mahi recipe. A filet of fish topped with our homemade Cajun seasoning then cooked to perfection!

Are you craving a spicy seafood dinner? Well, my friend, then look no further.

Our blackened Mahi Mahi recipe features a meaty fish filet seasoned with Kim’s custom Cajun spice mix.

The spices add a ton of heat and flavor to an already delicious piece of fish.

The blackened mahi mahi served with fresh lemon wedges.

It should be noted that this recipe is very spicy. In fact, it was a little too spicy for me.

If that concerns you, then consider omitting the cayenne pepper and reducing the black pepper in the Cajun seasoning mix.

If this recipe sounds too spicy, you may want to try our oven baked mahi mahi or baked cod with panko.

Top-down view of the blackened Mahi Mahi.

How to make Cajun seasoning?

First, grab a small bowl and a whisk.

Next, add the garlic powder, onion powder, smoked paprika, oregano, salt, thyme, black pepper, and cayenne pepper to the bowl.

Last, use your whisk to combine the ingredients. The spice mix can be stored in a sealed container, in your cabinet for up to 3-months.

Our homemade Cajun seasoning in a bowl.

How to make blackened Mahi Mahi?

Once you have the Cajun seasoning ready, it’s time to make the blackened Mahi Mahi.

Start by patting the fish filet(s) dry with a paper towel. After that, sprinkle the seasoning onto the fish.

The raw fish topped with Cajun spices.

Be sure to sprinkle both sides of the meat and rub the seasonings into the filet(s).

Now, heat a large skillet over low-medium heat. Add the butter and oil to the pan and use a whisk or wooden spoon to combine the fats.

Four Mahi Mahi filets cooking in a skillet.

Afterward, place the Mahi Mahi into the pan. Let it cook for about 6-minutes on each side or until the fish is fully cooked through.

When it’s done, turn off the heat and serve the meat while it’s hot.

That’s it, your blackened Mahi Mahi recipe is done! Kim and I hope you enjoy the dish 🙂

The fish has been cooked and plated.

What side dishes go with this recipe?

Any of these sides will pair nicely with the spicy fish.

If you like our recipe, please leave us a comment and rate the recipe card. You can also find us on Facebook, Pinterest, Twitter and Instagram searching for More Than Meat and Potatoes!

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A blackened Mahi Mahi filet on a square plate.

Blackened Mahi Mahi

Yield: 1 Lb.
Prep Time: 10 minutes
Cook Time: 12 minutes
Total Time: 22 minutes

Spice up your seafood with our blackened Mahi Mahi recipe. A filet of fish topped with our homemade Cajun seasoning then cooked to perfection!

Ingredients

  • 2 Teaspoons Garlic Powder
  • 1 ½ Teaspoons Onion Powder
  • 1 ½ Teaspoons Smoked Paprika
  • 1 Teaspoon Oregano
  • 1 Teaspoon Salt
  • 1 Teaspoon Thyme
  • ½ Teaspoon Black Pepper
  • ¼ Teaspoon Cayenne Pepper, or to taste
  • 1 Pound Mahi Mahi Filet
  • 2 Tablespoons Unsalted Butter
  • 2 Tablespoons Olive Oil

Instructions

In a small bowl, combine the garlic powder, onion powder, smoked paprika, oregano, salt, thyme, pepper, and cayenne.

Pat the fish filets dry with a paper towel, and sprinkle both sides with the Cajun seasoning mix. Rub the seasoning into the fish, and ensure the fish is evenly coated.

Heat a large skillet over low to medium heat. Add the butter and oil and use a wooden spoon or whisk to combine. Add the fish, and cook for 4 to 6 minutes on each side. The fish should be opaque and flake easily with a fork. An instant read thermometer should read 137°F when inserted into the thickest part of the filet.

Remove the mahi mahi from the pan to a waiting plate. Serve hot with lemon wedges, a side salad, and rice.

Notes

This recipe is quite spicy. To make the dish less spicy, reduce or omit the cayenne pepper and consider reducing the paprika and black pepper. Paprika is not typically heavy in heat, but in large amounts, it may add “spice” to some dishes.

The calories listed are an approximation based on the ingredients in the recipe card and a serving size of 4-ounces of blackened Mahi Mahi. Actual

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Nutrition Information:
Yield: 4 Serving Size: 1
Amount Per Serving: Calories: 247Total Fat: 14gSaturated Fat: 5gTrans Fat: 0gUnsaturated Fat: 8gCholesterol: 122mgSodium: 660mgCarbohydrates: 3gFiber: 1gSugar: 0gProtein: 28g

The calories listed are an approximation based on the ingredients and a serving size of 4-ounces of the blackened Mahi Mahi. Actual calories will vary.

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