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blackened mahi mahi on a plate with butternut squash and green beans with a fork flaking the fish apart
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Blackened Mahi Mahi (Air Fryer or Stovetop!)

An easy, elevated fish dinner that’s easy enough for a weeknight, but feels like a fancy, dine-out meal! This blackened Mahi Mahi is coated in a homemade Cajun blackened seasoning, and air fried to perfectly tender, buttery fish in no time. From start to finish you’ll have this delicious white fish on your table in under 15 minutes!
Course Dinner
Cuisine American
Diet Gluten Free
Prep Time 5 minutes
Cook Time 8 minutes
Total Time 13 minutes
Servings 4 servings
Calories 249kcal
Author Mary Smith

Equipment

Ingredients

  • 4 mahi mahi fillets about 6 oz each, thawed. I get the frozen fillets from Costco!
  • 2 tbsp ghee or vegan butter for dairy free
  • 1 tbsp avocado oil

Cajun Spice Rub

  • 1 tsp garlic powder
  • 1 tsp onion powder
  • 1 tsp paprika
  • 1 tsp oregano
  • 1 tsp thyme
  • ¼ tsp cayenne pepper more if you like heat!
  • 1 tsp salt
  • ½ tsp pepper

Instructions

  • Add the spices into a bowl and mix to combine.
  • Make sure the fish is thawed thoroughly. Pat dry with paper towels. Rub the spice mixture all over each fillet, coating it completely and pressing down with your fingers to make it stick.

Stove Top / Skillet

  • Heat the butter and oil in a large cast iron skillet. When sizzling hot, add the mahi mahi. Cook for 3-4 minutes without touching, then carefully flip and cook for another 3 minutes. The fish should flake easily at that point.
  • Let it rest for a couple of minutes, then serve with a squeeze of lemon on top. I like to serve this with some fruity salsa, potatoes, rice, or veggies!

Air Fryer Mahi Mahi

  • Preheat air fryer to 400 for 3 minutes.
  • Spray the basket with cooking oil, then add the fillets in an even layer (you may need to do this in batches).
  • Air fry for 8 minutes or until the fish flakes easily with a fork. Enjoy!

Notes

Expert Tips

  • If you want a spicier blackened seasoning, add more cayenne pepper. If you prefer a very mild spice, omit or decrease the cayenne pepper. 

Serving Tips

  • Serve with your favorite sides and lemon wedges or slice and make fish tacos with corn tortillas and this homemade mango salsa.

Storage Tips

  • Store leftover air fryer Mahi Mahi in an airtight container in the refrigerator. Reheat in the air fryer or stovetop and serve with the salsa.

Nutrition

Serving: 1fillet | Calories: 249kcal | Carbohydrates: 2g | Protein: 32g | Fat: 12g | Saturated Fat: 5g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Cholesterol: 143mg | Sodium: 732mg | Potassium: 739mg | Fiber: 1g | Sugar: 0.1g | Vitamin A: 430IU | Vitamin C: 3mg | Calcium: 40mg | Iron: 2mg