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A piece of Blackened Mahi Mahi on a plate with mashed sweet potatoes.
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4.96 from 248 votes

Blackened Mahi Mahi

You can easily control the level of spiciness in blackened fish by making your own Cajun spice mix. This is a super fast, incredibly delicious way to add more seafood to your diet.
Prep Time10 mins
Cook Time8 mins
Total Time18 mins
Course: Main Course
Cuisine: Cajun
Servings: 4
Calories: 268kcal


  • 4 mahi mahi fillets approximately 6 ounces each
  • 2 tablespoons butter
  • 1 tablespoon olive oil
  • 1 lemon

Kickin’ Cajun Seasoning Mix:

  • 1 ½ teaspoons onion powder
  • 1 teaspoon garlic powder
  • 1 teaspoon smoked paprika
  • 1 teaspoon dried thyme leaves
  • 1 teaspoon dried oregano leaves
  • 1 teaspoon fine grain sea salt
  • ½ teaspoon freshly ground black pepper
  • ½ teaspoon cayenne pepper or to taste


  • Combine all Kickin' Cajun Seasoning Mix ingredients in a small bowl.
  • Pat fillets dry with paper towels. Season the fillets liberally with Kickin' Cajun Spice Mix on both sides, pressing the seasoning into the fish with your hands. Wash hands thoroughly.
  • Place a large saute pan over medium-high heat and add butter and oil. When the fat is nice and hot, add the seasoned fish. Cook, undisturbed, for several minutes, until golden brown on one side. Flip fish over and continue to cook until opaque and completely cooked through.
  • Squeeze lemon juice over the fish and serve.



If you're cooking more than 4 fillets or would like to add a more generous amount of seasoning, follow my recipe to prepare a big batch of Kickin' Cajun Seasoning Mix.


Calories: 268kcal | Carbohydrates: 4g | Protein: 38g | Fat: 11g | Saturated Fat: 5g | Cholesterol: 164mg | Sodium: 540mg | Fiber: 1g | Sugar: 1g