Mahi Mahi Mango Lime Butter

My neighbor brought over a crate of mangoes from her backyard tree last summer, more than we could ever eat fresh. I started throwing them into everything, and this mango lime butter was the happy accident that stuck. Now whenever I smell mangoes hitting the grill, I am back on that patio with sticky fingers and sunshine everywhere.

I made this for my in laws last 4th of July when they came over for what was supposed to be burgers. Nobody missed the burgers. The next day my mother in law called three times trying to recreate that sauce, which is basically the highest compliment I have ever received.

Ingredients

• 4 mahi mahi fillets: Mahi mahi is firm enough to hold up on the grill without falling apart, and its mild flavor lets the mango butter shine
• Olive oil: Helps the seasoning stick and prevents the fish from sticking to the grates
• Sea salt and black pepper: Simple seasoning that lets the tropical flavors take center stage
• 1 ripe mango: Look for a mango that gives slightly when pressed, but is not mushy
• Lime zest and juice: Bright acid cuts through the rich butter and sweet mango
• Unsalted butter: Softened to room temperature so it blends easily into the sauce
• Honey: Just enough to balance the tartness and help the butter caramelize on the grill
• Garlic clove: One small clove is plenty since you do not want to overpower the mango
• Chili flakes: Optional, but I love the subtle warmth that lingers after each bite
• Fresh cilantro: Brings a herbal brightness that makes everything taste fresher

Instructions

Fire up the grill:

Get your grill to medium high heat, about 400°F, and give the grates a quick brush down

Season the fish:

Pat the fillets dry with paper towels, brush with olive oil, and sprinkle with salt and pepper

Make the mango butter:

Blend the mango, lime zest and juice, softened butter, honey, garlic, chili flakes, cilantro, and a pinch of salt until completely smooth

Get grilling:

Lightly oil the grates and lay the fillets down, letting them cook undisturbed for 4 to 6 minutes per side until the fish flakes easily

Add the butter:

Spoon some mango butter over each fillet during the last minute so it melts into all those gorgeous grill marks

Finish and serve:

Transfer to plates, top with more butter, and scatter with fresh cilantro and lime wedges before it hits the table

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This recipe has become our go to for summer birthdays. There is something about eating tropical food outside that makes everything feel like a vacation, even if you are just in your backyard.

Choosing the Perfect Mango

I have learned that not all mangoes are created equal for this sauce. Ataulfo mangoes are creamier and less fibrous than the big red ones, which means your butter will be silkier. If you can only find regular mangoes, just give the blended butter an extra minute to get it completely smooth.

Grill Temperature Secrets

Medium high might feel too hot, but you want that sear. The key is letting the fish develop a crust before trying to move it. If you are unsure, gently test with a spatula, and if it resists, give it another minute.

What to Serve Alongside

Coconut rice is the obvious choice here, but grilled pineapple or zucchini works beautifully too. The sweetness plays so well with the tangy butter sauce.

• A crisp white wine like Sauvignon Blanc cuts through the richness perfectly
• Warm tortillas on the side turn this into fish tacos the next day
• Extra lime wedges are never a bad idea at the table

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I hope this brings a little sunshine to your table, no matter the season.

Recipe Questions

→ What makes mango lime butter special?

The mango lime butter combines sweet ripe mango, bright lime zest and juice, creamy butter, honey, garlic, and fresh cilantro into a silky compound butter that melts over the hot fish, creating an incredible sauce that balances tropical sweetness with tangy citrus notes.

→ Can I use frozen mahi mahi fillets?

Yes, frozen mahi mahi works well for this dish. Thaw the fillets overnight in the refrigerator before preparing, then pat them thoroughly dry with paper towels to ensure proper grilling and prevent steaming.

→ What other fish can I substitute?

Firm white fish like halibut, snapper, grouper, swordfish, or sea bass make excellent alternatives. Choose fillets of similar thickness to ensure even grilling times and maintain the dish's texture.

→ How do I know when the mahi mahi is done?

The fish is ready when it turns opaque throughout and flakes easily with a fork. The internal temperature should reach 145°F. Avoid overcooking, as mahi mahi can become dry. Start checking at the 4-minute mark per side.

→ Can I make the mango lime butter ahead?

Absolutely! Prepare the compound butter up to 2 days in advance and refrigerate. Bring it to room temperature before using so it melts smoothly over the grilled fish. You can also roll it into a log using plastic wrap for easy slicing.

→ What sides pair well with this dish?

Coconut rice, grilled pineapple, roasted plantains, sautéed vegetables, or a fresh tropical salad with avocado and citrus vinaigrette complement the flavors beautifully. For something lighter, serve with steamed asparagus or zucchini noodles.