Blackened Mahi Mahi with Homemade Seasoning

Why not have Cajun seasoned fish on the menu this evening? Blackened mahi mahi with homemade seasoning is a great protein to fry in your cast iron skillet. It’s so easy to prepare and cook and you will love the perfectly balanced mahi rub flavours. I bet you already have most of the ingredients on hand for this!

Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi with homemade seasoning made in a cast iron skillet.

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Blackened mahi mahi with lime, herbs and spices is so simple to make and the flavour is just as good as anything you can order in a seafood restaurant. You can tweak the mahi rub to your palate and also try another kind of fish if you want to experiment.

Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi with homemade seasoning made in a cast iron skillet.

Cajun Seasoned Fish Ingredients

To make the most delicious blackened mahi mahi, you will need fish filets, lime and oil. The homemade seasoning includes paprika, cumin, garlic, onion, thyme, chilli powder, salt, and pepper.

Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi with homemade seasoning made in a cast iron skillet.

Alternatives to mahi mahi include cod, salmon, grouper, haddock, or flounder. As for the seasoning, feel free to leave out the chilli powder for a milder flavour or tweak the other ingredients or amounts.

Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi with homemade seasoning made in a cast iron skillet.
Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi with homemade seasoning made in a cast iron skillet.

How to Make Blackened Mahi Mahi

The first step in making Cajun seasoned fish is to preheat a cast iron skillet. While it heats up, you can pat paper towels on the fish to get rid of any moisture. Mix the homemade seasoning ingredients together then spread the mahi rub mixture over a plate.

Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi with homemade seasoning made in a cast iron skillet.

Brush lime juice over both sides of the fish, and then dip it in the homemade seasoning mix. Melt coconut oil in the skillet, which should be hot by now. Then cook the fish for several minutes per side or until it’s blackened on both sides and at least 135 degrees F in the center. Serve with cilantro and lime wedges, as well as your favourite sides. If you love this recipe, I bet you’d also enjoy blackened tilapia nachos.

Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi with homemade seasoning made in a cast iron skillet.
Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi with homemade seasoning made in a cast iron skillet.

Side Dishes for Blackened Mahi Mahi

Since blackened mahi mahi has such a bold flavour, you might like to consider neutral or mild-tasting sides, as a contrast. Mashed potatoes are always good with such dishes, or perhaps you prefer roasted Brussels sprouts or creamy mushroom risotto.

Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi with homemade seasoning made in a cast iron skillet.
Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi. Make this cajun seasoned fish with a tasty mahi rub.

You can’t go far wrong with a simple green salad, especially with ‘cooling’ veggies such as cucumber to contrast with the spicy fish. And a salad is always a good way to clear out your crisper drawer and use up anything getting beyond its prime.

Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi. Make this cajun seasoned fish with a tasty mahi rub.

5 Tips for Perfect Blackened Fish

Making blackened mahi mahi isn’t hard at all, but if you’re new to this kind of cooking, it’s worth knowing a few tips before you get started:

Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi. Make this cajun seasoned fish with a tasty mahi rub.
Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi. Make this cajun seasoned fish with a tasty mahi rub.
  1. Open a window. Or two. Or all of them! As you might expect, this recipe produces a lot of smoke, which is why many home cooks prefer to use an outdoor grill. But you can make it indoors. However, instead of setting off all your smoke alarms, you can just open a window or door, and have the extractor fan on max. Solved!
  2. Tweak the seasoning ingredients to suit your palate. If you don’t have some of the ingredients in the mahi rub, simply use what you do have. There are many different blackening spice recipes but it’s also fun to come up with your own.
  3. Invest in a good cast iron skillet. This cookware can withstand very high temperatures without cracking or warping. The iron content in the skillet reacts with acidic foods like citrus or tomatoes and also blackens and crisps up the fish coating.
  4. Don’t forget to pat the fish dry before adding the lime juice and seasoning mixture, else any moisture will dilute the lime and make it harder for the seasoning to stick.
  5. Butter is often used to make blackened fish. I like to use coconut oil. You could even use avocado or olive oil, or a combination.
Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi. Make this cajun seasoned fish with a tasty mahi rub.
Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi. Make this cajun seasoned fish with a tasty mahi rub.

Blackened Mahi Mahi FAQs

Can you reheat leftovers?

Yes you can, so you might like to cook up some extra. Keep leftovers in a sealed container in the refrigerator. Fish can be safely reheated for up to 3 or 4 days after cooking it. It’s already blackened so you can just warm it back up in any pan.

What other type of fish can you use?

Blackened mahi mahi doesn’t just taste great. It also has a great texture. If you want to use a different fish, choose something firm rather than something delicate that will fall apart in the pan. Sturdy fish like cod, salmon, tuna, swordfish, redfish, and haddock will work well, while fragile fish such as halibut or sole won’t.

Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi. Make this cajun seasoned fish with a tasty mahi rub.
Food blogger, Bella Bucchiotti of xoxoBella, shares a recipe for blackened mahi mahi. Make this cajun seasoned fish with a tasty mahi rub.

Blackened Mahi Mahi with Homemade Seasoning Recipe

Blackened Mahi Mahi with Homemade Seasoning

Course: Main Course, Meals
Cuisine: American
Keyword: seafood
Prep Time: 10 minutes
Cook Time: 15 minutes
Total Time: 25 minutes
Servings: 6
Calories: 141kcal
Author: Bella
Why not have Cajun seasoned fish on the menu this evening? Blackened mahi mahi with homemade seasoning is a great protein to fry in your cast iron skillet. It's so easy to prepare and cook and you will love the perfectly balanced mahi rub flavours.
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Ingredients

  • 4 Mahi filets
  • 1 lime
  • 2 Tablespoon coconut oil

Blackened Seasoning

  • ½ Teaspoon paprika
  • ½ Teaspoon cumin
  • ½ Teaspoon garlic powder
  • ½ Teaspoon onion minced
  • ¼ Teaspoon thyme
  • ¼ Teaspoon pepper
  • ¼ Teaspoon sea salt
  • ¼ Teaspoon chili powder

Instructions

  • Preheat a cast iron skillet over medium/high heat.
  • Use a paper towel to blot the Mahi Mahi filets dry.
  • Combine ingredients for blackened seasoning in a bowl or ramekin. Mix well, then evenly spread onto a plate.
  • Juice the lime and brush both sides of the filet with the lime juice. This will give a tangy taste and help the seasoning to adhere.
  • Dip both sides of the Mahi Mahi into the seasoning to thoroughly coat.
  • Add coconut oil to the hot skillet. Swirl to coat the pan.
  • Next, add mahi mahi. Cook for 5 minutes per side.
  • The blackened seasoning will form a dark crust on the filets. Check to be sure the fish is cooked by using a meat thermometer (mahi mahi safe temp is 135 degrees F to 145 degrees F), or that it is opaque and flakes easily.
  • Serve with lime wedges and garnish with cilantro.

Nutrition

Calories: 141kcal | Carbohydrates: 2g | Protein: 21g | Fat: 5g | Saturated Fat: 4g | Polyunsaturated Fat: 0.3g | Monounsaturated Fat: 0.5g | Cholesterol: 83mg | Sodium: 199mg | Potassium: 493mg | Fiber: 0.4g | Sugar: 0.2g | Vitamin A: 254IU | Vitamin C: 4mg | Calcium: 24mg | Iron: 2mg

The nutrition information provided are only estimates based on an online nutritional calculator. I am not a certified nutritionist. Please consult a professional nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.

You’re going to love this tasty blackened mahi mahi. Cajun seasoned fish in a cast iron skillet boasts big flavours and it’s really quick and easy to make too.

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  1. Wendy Schmidt wrote:

    5 stars
    I haven not made mahi in a long time, been using tilapia lately. Must try this one. thanks

    Posted 8.1.22 Reply