Blackened Mahi-Mahi
Tender, flaky mahi-mahi fillets coated in a bold Cajun spice blend and seared to perfection in a cast-iron skillet. This classic dish delivers a smoky, spicy crust and a juicy interior, ready in under 20 minutes.
For 4 servings
6 steps. 8 minutes total.
- 1
Step 1
- a.In a small bowl, combine the paprika, garlic powder, onion powder, dried thyme, dried oregano, cayenne pepper, black pepper, and salt. Mix thoroughly to create the blackening spice blend.
- 2
Pat the mahi-mahi fillets completely dry with paper towels
- a.This is crucial for a crispy crust. Spread the spice mix evenly on a large plate or shallow dish. Press each fillet firmly into the mixture, ensuring all sides are generously coated.
- 3
Place a large cast-iron skillet over high heat
- a.Let it preheat for 4-5 minutes until it is extremely hot. Proper ventilation is essential, so turn on your exhaust fan and open a window, as this process will create smoke.
- 4
Add the avocado oil and butter to the hot skillet
- a.The butter will melt and foam immediately. Carefully place the seasoned mahi-mahi fillets in the skillet, leaving space between them. Cook in batches if necessary to avoid overcrowding.
- 5
Sear the fillets for 3-4 minutes on the first side without moving them
- a.This allows a dark, flavorful crust to form. Use a fish spatula to flip the fillets carefully and cook for another 3-4 minutes on the second side, or until the fish is opaque and flakes easily with a fork. The internal temperature should reach 145°F (63°C).
- 6
Remove the fish from the skillet and transfer to a plate
- a.Let it rest for 1-2 minutes. Garnish with fresh parsley and serve immediately with lemon wedges for squeezing over the top.
What to keep in mind.
6 tips from the recipe — small details that make a real difference to the final dish.
- 1A cast-iron skillet is highly recommended as it retains high, even heat, which is essential for the blackening process.
- 2Ensure your mahi-mahi fillets are of similar thickness for even cooking.
- 3Do not overcrowd the pan. Cook in batches if needed to maintain the high temperature of the skillet and ensure a good sear.
- 4Use a thin, flexible fish spatula for flipping the fillets to prevent them from breaking apart.
- 5The spice crust can burn if cooked for too long. Watch it closely and adjust the heat slightly if it's darkening too quickly.
- 6Balance the spicy flavor with a cool, refreshing side like a corn and avocado salsa, coleslaw, or a simple green salad.
Adapt it for your goals.
Different Fish
This blackening spice blend works wonderfully with other firm fish like grouper, snapper, cod, or even salmon.
Spice LevelSpice Level
Easily adjust the heat by increasing or decreasing the amount of cayenne pepper. For a smokier flavor, use smoked paprika instead of sweet paprika.
Cooking MethodCooking Method
For a less smoky kitchen, you can grill the blackened mahi-mahi on a preheated grill over medium-high heat for 3-4 minutes per side.
Herbaceous TwistHerbaceous Twist
Add 1 teaspoon of dried dill to the spice blend for a fresh, herbaceous note that pairs well with fish.
Why this is on our healthy list.
Excellent Source of Lean Protein
Mahi-mahi provides high-quality protein essential for muscle building, tissue repair, and maintaining a healthy metabolism, all with a low fat content.
Rich in Omega-3 Fatty Acids
Contains beneficial omega-3s, which are known to support heart health by reducing inflammation, lowering blood pressure, and improving cholesterol levels.
Supports Immune Function
This fish is a great source of selenium, a powerful antioxidant that helps protect cells from damage and plays a crucial role in the health of your immune system and thyroid function.
Metabolism-Boosting Spices
The cayenne pepper in the blackening blend contains capsaicin, a compound that can provide a temporary boost to your metabolism and aid in fat burning.
Frequently asked questions
Blackening is a cooking technique, not a sign of burning. It involves coating the protein in a specific spice blend and searing it in a very hot cast-iron skillet. The spices and milk solids from the butter toast and darken, creating a delicious, flavorful crust that is dark brown or black, but not burnt.