If you love bold spices and perfectly seared fish, this blackened mahi mahi recipe is a must-try. With a flavorful Cajun-inspired seasoning and a crispy crust, this seafood dish delivers restaurant-quality taste at home.
Mahi mahi is firm, mild, and perfect for blackening because it holds its shape and absorbs spices beautifully.
This recipe is:
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Ready in under 25 minutes
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High in protein
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Low in carbs
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Perfect for fish tacos or rice bowls
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Easy for beginners
Why You’ll Love This Blackened Fish Recipe
✔ Bold Cajun-style seasoning
✔ Crispy, flavorful crust
✔ Juicy, tender inside
✔ Healthy and lean seafood
✔ Great for meal prep
Ingredients
For the Fish:
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4 mahi mahi fillets
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2 tablespoons olive oil or melted butter
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Lemon wedges (for serving)
For the Blackening Seasoning:
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1 teaspoon paprika
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1 teaspoon smoked paprika
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½ teaspoon cayenne pepper (adjust to taste)
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½ teaspoon garlic powder
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½ teaspoon onion powder
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½ teaspoon dried thyme
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½ teaspoon dried oregano
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½ teaspoon salt
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½ teaspoon black pepper
How to Make Blackened Mahi Mahi
Step 1: Prepare the Seasoning
In a small bowl, mix all blackening spices until well combined.
Step 2: Season the Fish
Pat mahi mahi fillets dry. Brush both sides with olive oil or melted butter.
Coat generously with the spice mixture, pressing it into the fish.
Step 3: Heat the Pan
Heat a cast-iron skillet over medium-high heat until very hot.
Step 4: Cook the Fish
Place fillets in the hot skillet. Cook for 3–4 minutes per side until a dark crust forms and the fish flakes easily with a fork.
Internal temperature should reach 145°F (63°C).
Step 5: Serve
Remove from heat and squeeze fresh lemon juice over the top before serving.
Pro Tips for Perfect Blackened Fish
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Use a cast-iron skillet for best crust.
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Don’t overcrowd the pan.
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Avoid moving the fish too much while cooking.
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Adjust cayenne for preferred spice level.
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Let fish rest for 2 minutes before serving.
What to Serve with Blackened Mahi Mahi
This bold seafood dish pairs well with:
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Coconut rice
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Cilantro lime rice
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Grilled vegetables
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Corn on the cob
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Fresh mango salsa
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Fish tacos with slaw
Storage & Reheating
Refrigerator: Store in airtight container up to 3 days.
Reheating: Warm gently in skillet over medium heat.
Freezing: Freeze up to 2 months.
Health Benefits of Mahi Mahi
Mahi mahi is:
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High in lean protein
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Low in fat
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Rich in selenium
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A good source of vitamin B12
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Heart-healthy
It’s an excellent choice for a balanced seafood meal.
Frequently Asked Questions
Can I grill mahi mahi instead?
Yes! Grill over medium heat for 4–5 minutes per side.
Is blackened fish very spicy?
It can be adjusted. Reduce cayenne for milder flavor.
Can I use other fish?
Yes, cod, tilapia, or snapper work well too.
Final Thoughts
This blackened mahi mahi recipe is bold, simple, and full of flavor. Whether served in tacos, over rice, or alongside vegetables, it’s a healthy seafood dish that’s easy to prepare and incredibly satisfying.
