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Grilled Mahi Mahi with Blackened Seasoning

Coated with a blackened seasoning and grilled to perfection, this Grilled Mahi Mahi is an amazingly delicious piece of fish that is simple, satisfying, and ready in under 30 minutes!
Prep Time15 minutes
Cook Time12 minutes
Total Time27 minutes
Course: Main Dish
Cuisine: Seafood
Keyword: Grilled Mahi Mahi
Servings: 4 people
Author: Susie Bulloch (heygrillhey.com)


  • 4 mahi mahi filets about 6 ounces each
  • 2 Tablespoons butter melted
  • 2 Tablespoons Blackened Seasoning
  • 2 Tablespoons avocado oil
  • 1 lemon cut into wedges


  • Preheat. Preheat your grill to 425 degrees F.
  • Season the mahi mahi. Brush the mahi mahi filets with the melted butter. Season the mahi mahi on all sides with the blackened seasoning.
  • Oil the grill grates. Fold a paper towel and pinch it with a pair of tongs. Submerge the paper towel in 2 Tablespoons of a high heat cooking oil (like avocado oil, rapeseed oil, melted ghee or melted beef tallow). The paper towel should be saturated, but not dripping Brush the oiled paper towel lightly over your grill grates.
  • Grill the mahi mahi. Place the seasoned mahi mahi filets on the oiled grill grates. Close the lid and cook for 6 minutes. Open the lid to flip the filets. Use a metal spatula and lightly lift the filets to separate them from the grates. You will only flip the fish once. Close the lid and continue to grill the mahi mahi for 6 minutes on the second side. Open the lid and check the mahi mahi for doneness. You want the filets to read 145 degrees F internal temperature.
  • Serve with lemon. Carefully remove your mahi mahi filets from the grill and transfer to your serving platter. Serve with fresh lemon wedges and enjoy.


Calories: 264kcal | Carbohydrates: 3g | Protein: 32g | Fat: 14g | Saturated Fat: 5g | Trans Fat: 1g | Cholesterol: 139mg | Sodium: 733mg | Potassium: 746mg | Fiber: 1g | Sugar: 1g | Vitamin A: 487IU | Vitamin C: 14mg | Calcium: 34mg | Iron: 2mg