Flavorful and flaky Oven-Roasted Mahi Mahi is ready in under 20 minutes!
This easy recipe uses ingredients like lemon and Old Bay or blackened seasoning for a delicious and healthy meal. Perfect for a weeknight dinner!
Are you looking for a simple and delicious way to prepare Mahi? We love roasting fish in the oven. Roasting preserves the fish's natural flavors, and it stays moist while it cooks.
This fish is seasoned with Old Bay's original flavor. You can pick it up at any fish market or grocery store.
You can make a delicious and healthy seafood meal quickly with simple ingredients and a hot oven.
Jump to:
- What is Mahi Mahi?
- The Best Roasted Mahi Mahi
- How To Season Fish Fillets For Roasting
- #1 - Old Bay Seasoning
- #2 - Blackened Seasoning
- What You Need
- Substitutes for Mahi
- How to Roast Fish
- Storage and Reheating
- Tips for Success
- Best Sides for Baked Mahi Mahi
- Recommended Florida Keys Fish Recipes
- FAQ
- "📖 Recipe"
- 💬 Comments
What is Mahi Mahi?
Mahi, also known as dolphin fish or dorado, is a colorful species found in warm ocean waters globally.
In the Florida Keys, it's a popular choice. We have a lot of Mahi swimming outside!
This fish has firm and mild-flavored flesh, making it perfect for grilling, baking, frying, sautéing, searing, or using it raw in dishes like ceviche.
Its vibrant appearance and delicate taste make it a favorite among seafood lovers worldwide.
The Best Roasted Mahi Mahi
Come on down to Key Largo, hop on a fishing boat, and catch some fresh Mahi-mahi.
There is nothing like fresh fish, but frozen fish fillets can also be great!
If you are buying fish from your grocer's fish counter, smell the fish before purchasing and make sure it smells like the sea and looks moist.
Like our Roasted Yellowtail, a simple seasoning of Old Bay elevates this meal and turns it into something quite special.
How To Season Fish Fillets For Roasting
Seasoning baked fish is a simple step in enhancing the flavor of fish. Here are two popular seasoning options:
#1 - Old Bay Seasoning
Old Bay Seasoning is a classic American seasoning blend for fish and shellfish.
It contains a mix of herbs and spices, including celery salt, paprika, mustard, and black pepper, among others.
To use, simply sprinkle Old Bay seasoning over the fish before roasting, allowing its flavors to infuse during cooking.
#2 - Blackened Seasoning
Another of my favorite seasonings is blackened seasoning. Originating in New Orleans and popular in the south, blackened seasoning is very tasty and a little spicy.
We have a homemade blackened seasoning with a blend of spices like paprika, garlic powder, onion powder, thyme, oregano, cayenne pepper, and black pepper.
Blackened is a way to cook fish by coating the fillets with a tasty spice mixture and frying them in a hot skillet.
Store homemade blackened seasoning in your pantry and sprinkle it generously over fish or vegetables before roasting or baking for a bold and spicy flavor.
I use blackened seasoning to make tasty dishes like Blackened Swordfish, Snapper with Key Lime Butter, Cajun Shrimp, and Grits and Grunts for breakfast.
Try different seasoning options to find the flavor you like best when baking fish, like the savory taste of Old Bay or the spicy kick of homemade blackened seasoning.
What You Need
- Mahi Mahi fillets
- olive oil
- unsalted butter
- Old Bay or blackened seasoning
- lemons
- salt and black pepper to taste
- fresh parsley, either flat leaf or curly
See the recipe card below for quantities.
Substitutes for Mahi
We have some other local fish you can use in this recipe.
Try this recipe with yellowtail snapper, mutton snapper, mangrove snapper, snook, tripletail, hogfish, grunts, or grouper.
Any thin white fish fillet will work. The baking time will vary depending on the thickness of the fish.
How to Roast Fish
This baked Mahi recipe is ready in 20 minutes.
- Preheat your oven to 375 °F (190 °C) and position the oven rack in the center of the oven.
- Rinse the fish fillets under cold water and gently pat them dry with paper towels.
- Place the fillets on a glass baking dish or a sheet pan lined with parchment paper. If parchment paper isn't available, lightly spray the pan with cooking oil.
- Brush each fish fillet with olive oil.
- Generously sprinkle seasoning over each fillet, then scatter butter over the top.
- Roast the fish for 10–15 minutes, adjusting the time based on the thickness of the fillets. The fish is done when it flakes easily with a fork and reaches an internal temperature of 145 °F (63 °C) on a meat thermometer.
- While the fish is cooking, zest a lemon.
- Remove the pan from the oven and allow the fish to rest for two minutes before serving.
- Garnish the fish with lemon zest, fresh parsley, and lemon wedges for added flavor.
Storage and Reheating
- Store any leftover cooked fish in an airtight container in the refrigerator for up to 3 days.
- To reheat fish, gently warm it in the microwave or oven until heated through. Be cautious not to overcook it.
- You can heat the fish in a skillet with olive oil over medium heat for a few minutes.
Shown here is leftover baked Mahi with Poached Garlic Mashed Potatoes and Peach Mango Salsa.
Tips for Success
- Find a reputable fish market to purchase fish.
- Cut your Mahi fillets evenly sized, so they cook at the same rate.
- The FDA recommends cooking fish until it reaches an internal temperature of 145 °F (62 °C).
- Avoid overcooking the fish, as it can become dry and tough. Keep a close eye on it towards the end of the cooking time to prevent this.
- Feel free to customize the seasoning according to your preferences. You can experiment with flavored olive oil for extra flavor.
- Serve baked mahi-mahi with your favorite sides, such as steamed vegetables, rice, or a green salad.
This fish dinner is not only delicious but also incredibly healthy! With 275 calories per serving, it's grain free, gluten-free, paleo, and perfect for a low-carb diet.
Best Sides for Baked Mahi Mahi
Here are some of our delicious side dishes to go with your fish dinner:
- Sweet and Creamy Macaroni Salad
- Lemon Asparagus Rice
- Authentic Spanish Rice Recipe with Peas
- Peach Mango Salsa
- Roasted Broccoli and Carrots
- Cauliflower Rice
- Oven Roasted Baby Gold Potatoes
- Chickpea Cucumber Tomato Feta Salad
- Quick Cheddar Mac and Cheese
There's nothing quite like the timeless combination of a homemade Key Lime Pie with Mahi! In The Keys it's the perfect ending to any meal.
Key Takeaway
Roasting Mahi at 375°F (191°C) for 10-15 minutes results in perfectly cooked fillets that are moist, delicious, and easy to prepare.
By following this simple oven-roasted fish recipe, you can create a delicious seafood dish that will impress your family and friends.
For seasoning, use a bottle of Old Bay that you can pick up at your fish market or our homemade blackened seasoning recipe.
Pair the baked Mahi with your favorite sides for a healthy homemade meal.
To cook Mahi on the stove, try our Pan Seared Mahimahi with Basil Butter recipe.
We also have a recipe for Crispy Pan-Fried Mahi fish sticks 🐠
Recommended Florida Keys Fish Recipes
- How To Roast a Whole Snapper in the Oven
- Crispy Yellowtail Sandwich
- Broiled Yellowtail with Blackening Seasoning
- The Best Snapper Recipes
- Roasted Yellowtail Snapper with Old Bay
- The Best Blackened Seafood Recipes
FAQ
Cooking fish at 375 °F ensures even cooking, a flavorful crust, and a moist interior without overcooking. This temperature allows the fish to cook through evenly without drying out. It's also hot enough to promote browning, adding depth of flavor to the dish without overcooking the delicate flesh of the fish.
Mahi-mahi, also known as dolphin fish or dorado, is a type of fish found in tropical waters. It's known for its firm texture, mild flavor, and versatility in cooking.
Roasted mahi-mahi pairs well with a variety of side dishes such as rice, roasted vegetables, or a green salad. Garnish the fish with lemon zest, fresh herbs, and lemon wedges.
"📖 Recipe"
Oven Roasted Mahi Mahi with Old Bay
Ingredients
- 1 ½ pounds mahi mahi fillets
- 1 tablespoon olive oil
- 2 tablespoons Old Bay seasoning or sub homemade blackened seasoning
- 2 lemons
- 3 tablespoons unsalted butter, cut into little cubes while its cold
- ½ cup chopped fresh parsley, either flat leaf or curly
- Salt and freshly ground black pepper to taste
Instructions
- Preheat your oven to 375 °F (190 °C) and position the oven rack in the center.
- Rinse the fish under cold water and gently pat dry with paper towels.
- Place the fillets on a glass baking dish or a sheet pan lined with parchment paper. If parchment paper isn't available, lightly spray the pan with cooking oil.
- Brush each fish fillet with olive oil.
- Generously sprinkle seasoning over each fillet. Scatter the cubed butter over the fish.
- Roast the fish for 10–15 minutes, adjusting the time based on the thickness of the fillets. The fish is ready when it flakes easily with a fork and reaches an internal temperature of 145 °F (63 °C) on a meat thermometer.
- While the fish is cooking, zest a lemon using a handheld microplane.
- Remove the pan from the oven and allow the fish to rest for two minutes before serving.
- Garnish the fish with lemon zest, fresh parsley, and lemon wedges for added flavor. Serve hot.
Notes
- Store any leftover cooked fish in an airtight container in the refrigerator for up to 3 days.
- When reheating, gently warm the fish in the microwave or oven until heated through, being careful not to overcook.
- You can also reheat the fish in a small skillet over medium heat with a little olive oil for a few minutes.
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