This Chili-Lime Grilled Mahi-Mahi with Charred Corn & Avocado Salsa is fresh, colorful, a little smoky, a little sweet, and exactly the kind of summer dinner that looks more complicated than it actually is.
The mahi-mahi gets a simple chili-lime seasoning, then it’s paired with a bright salsa built around charred sweet corn, summer squash, jalapeño, red onion, cherry tomatoes, cilantro, lime, and creamy avocado.
A light chili-lime honey butter ties everything together without covering up the fish.
It’s the kind of backyard meal that feels light enough for a hot summer evening but still brings plenty of flavor from the grill.
From Our Backyard to Yours.
Why Mahi-Mahi Works So Well on the Grill
Mahi-mahi is one of my favorite fish choices for backyard cooking because it’s relatively firm compared with more delicate white fish.
That makes it easier to handle and a little more forgiving for anyone who’s still getting comfortable cooking seafood outdoors.
It also has a mild flavor, which means it plays really well with citrus, chili, grilled vegetables, fresh herbs, and a touch of sweetness without getting lost underneath everything else.
The Flavor Behind This Chili-Lime Mahi-Mahi
The seasoning is intentionally simple.
Chili powder and smoked paprika bring warmth and color, garlic and cumin add savory depth, and fresh lime zest keeps everything bright.
There’s enough seasoning to give the mahi some personality without turning it into heavily blackened fish.
If you already have a chili-lime, Southwest, fajita, seafood, or taco-style seasoning you love, that can work here too.
Just check the salt level before adding extra seasoning because store-bought blends can vary quite a bit.
The Charred Corn & Avocado Salsa
The salsa is what really makes this recipe feel like summer.
Sweet corn, summer squash, jalapeño, and red onion bring charred backyard flavor, while fresh cherry tomatoes, cilantro, and lime keep everything bright.
Then avocado adds the creamy contrast that balances the chili and acidity.
You end up with a mix of:
- Sweetness from the corn
- Smokiness from the charred vegetables
- Heat from the jalapeño
- Acidity from the lime and tomato
- Creaminess from the avocado
- Freshness from the cilantro
That’s what makes the salsa work so well with a firm, mild fish like mahi-mahi.
Why Avocado Belongs Here
Without the avocado, the salsa would still be good.
But with the avocado, it becomes much more balanced.
The mahi has chili and citrus. The salsa has char, jalapeño, onion, tomato, and lime. Avocado softens all of those sharper flavors and gives the finished dish a creamy element without requiring a heavy dressing or sauce.
It also makes the plate feel more substantial while keeping the whole meal fresh.
The Chili-Lime Honey Butter
This isn’t meant to be a heavy sauce.
It’s a simple finishing element made with butter, honey, fresh lime, chili powder, and a little salt.
The honey works especially well with the charred corn, while the lime ties the butter back into both the fish and the salsa.
Use it lightly. The goal is a little richness and gloss, not to drown the mahi-mahi.
Can I Use Frozen Mahi-Mahi?
Absolutely.
Frozen mahi-mahi is a practical option and often easier to find than truly fresh mahi-mahi.
Look for individually frozen fillets with a clean appearance and minimal freezer burn.
Once thawed, mahi-mahi still works beautifully with the chili-lime seasoning and fresh salsa.
Can I Substitute Another Fish?
Yes.
This flavor combination works best with a relatively firm fish that can stand up to grilling and a chunky vegetable salsa.
Good substitutes include:
- Halibut
- Grouper
- Swordfish
- Other thick, firm white fish
The exact cooking time will vary depending on the fish and thickness, so use internal temperature rather than assuming every fillet cooks exactly like mahi-mahi.
What Temperature Should Mahi-Mahi Reach?
Mahi-mahi should reach an internal temperature of 145°F in the thickest portion of the fillet.
An instant-read thermometer is the easiest way to take the guesswork out of cooking fish, especially when the fillets aren’t all exactly the same thickness.
You can also keep our free BBQ meat temperature chart handy for quick temperature references around the backyard.
Is Chili-Lime Mahi-Mahi Spicy?
As written, this recipe lands more in the mild-to-medium range than seriously spicy.
The chili seasoning adds warmth, but the corn, avocado, honey, and lime help balance the jalapeño.
If you prefer less heat, use less jalapeño or remove the seeds and inner membrane.
If you like things hotter, use more jalapeño or leave more of the interior intact.
Can I Make This Without an Outdoor Grill?
Yes.
A heavy cast-iron skillet or grill pan is a good indoor alternative.
You won’t get quite the same live-fire flavor, but the chili-lime seasoning, charred-style vegetables, avocado salsa, and honey butter still work together.
Can I Make the Salsa Ahead?
Most of it can be prepared ahead of time.
The vegetables, lime, cilantro, and seasonings can be combined in advance and kept chilled.
I would wait to add the avocado until closer to serving so it stays fresh and keeps its shape.
The salsa is best the same day it’s made.
What to Serve With Chili-Lime Grilled Mahi-Mahi
The charred corn and avocado salsa already brings a lot to the plate, so the rest of the meal can stay simple.
- Cilantro-lime rice
- Black beans
- Grilled asparagus
- Simple green salad
- Grilled tortillas
- Roasted potatoes
For a cold summer drink, our Watermelon Mint Cooler pairs especially well with grilled seafood, citrus, and fresh salsa.
Why This Fits Easy Backyard BBQ
This recipe has plenty going on visually, but none of the individual components are complicated.
That’s exactly what we want from Easy Backyard BBQ.
The mahi-mahi is mild and beginner-friendly, the seasoning uses familiar ingredients, and the salsa turns simple summer vegetables into something that looks restaurant-worthy on the plate.
You don’t need an all-day marinade, specialty equipment, or a huge ingredient list to make something that feels special.
Frequently Asked Questions
What does mahi-mahi taste like?
Mahi-mahi has a mild, slightly sweet flavor and a firmer texture than many white fish. That makes it a good match for bold seasonings, citrus, and fresh salsa.
What temperature should mahi-mahi reach?
Cook mahi-mahi to an internal temperature of 145°F in the thickest portion of the fillet.
Is mahi-mahi good for beginners?
Yes. Its firm texture makes it easier to handle than many delicate fish fillets, which is one reason it works so well for backyard grilling.
Can I use frozen mahi-mahi?
Yes. Frozen mahi-mahi works very well for this recipe. Thaw it completely before cooking.
Can I leave out the avocado?
Absolutely. The salsa still works without it, although you’ll lose some of the creamy contrast that balances the chili and lime.
Can I skip the honey butter?
Yes. The chili-lime mahi-mahi and charred vegetable salsa have plenty of flavor on their own. The honey butter is just a finishing layer.
What other fish can I use?
Halibut, grouper, swordfish, or another thick, firm white fish can all work well with this flavor profile.
What goes well with mahi-mahi?
Citrus, chili, avocado, corn, tomato, fresh herbs, rice, beans, and grilled vegetables all pair naturally with mahi-mahi.
Fresh Summer Flavor From the Backyard
This is the kind of seafood recipe that fits right into a backyard cookout without feeling heavy.
You get smoky chili-lime mahi-mahi, sweet charred corn, summer squash, jalapeño, fresh tomato, creamy avocado, and just enough honey-lime butter to pull everything together.
Fresh, colorful, approachable, and built for summer cooking.
Chili-Lime Grilled Mahi-Mahi with Charred Corn & Avocado Salsa
Equipment
- Gas or charcoal grill
- Long-handled grill tongs
- Fish spatula or wide metal spatula
- Instant-read meat thermometer
- Cutting board
- Sharp knife
- Large mixing bowl
- Small mixing bowl
- Basting brush
- Citrus zester
- Citrus juicer
Ingredients
FOR THE CHILI-LIME MAHI-MAHI
- 4 mahi-mahi fillets approximately 6 ounces each
- 1 tablespoon avocado oil
- 1 1/2 teaspoons chili powder
- 1 teaspoon smoked paprika
- 1 teaspoon garlic powder
- 1/2 teaspoon ground cumin
- 1/2 teaspoon kosher salt
- 1/2 teaspoon coarse black pepper
- Zest of 1 lime
FOR THE CHARRED CORN, SQUASH & AVOCADO SALSA
- 2 ears fresh sweet corn husks and silk removed
- 1 medium yellow summer squash halved lengthwise
- 1 medium jalapeño
- 1/2 medium red onion cut into thick wedges
- 1 cup cherry tomatoes quartered
- 1 medium ripe avocado diced
- 1/3 cup fresh cilantro chopped
- Juice of 2 limes
- 1 tablespoon extra-virgin olive oil
- 1 teaspoon avocado oil for grilling vegetables
- 1/2 teaspoon kosher salt plus more to taste
- 1/4 teaspoon coarse black pepper
FOR THE CHILI-LIME HONEY BUTTER
- 2 tablespoons unsalted butter melted
- 1 tablespoon honey
- 1 tablespoon fresh lime juice
- 1/4 teaspoon chili powder
- Small pinch kosher salt
FOR SERVING
- Fresh lime wedges
- Additional chopped cilantro optional
Instructions
PREHEAT THE GRILL
- Preheat a gas or charcoal grill for direct cooking at approximately 425–450°F.
- Clean the grill grates thoroughly.
- If possible, maintain a cooler section of the grill where the fish or vegetables can be moved if they begin browning too quickly.
PREP THE SALSA VEGETABLES
- Lightly coat the corn, yellow squash, jalapeño, and red onion with approximately 1 teaspoon avocado oil.
- Season lightly with kosher salt and black pepper.
GRILL THE VEGETABLES
- Place the corn, squash, whole jalapeño, and red onion directly over the heat.
- Grill the corn for approximately 8–10 minutes, turning periodically, until lightly charred on several sides.
- Grill the squash for approximately 4–6 minutes, turning as needed, until lightly charred but still firm enough to dice.
- Grill the jalapeño for approximately 4–6 minutes, turning until blistered on several sides.
- Grill the red onion for approximately 4–6 minutes until lightly charred and beginning to soften.
- Remove each vegetable as it finishes rather than waiting for everything to finish at the same time.
- Allow the vegetables to cool until comfortable to handle.
BUILD THE CHARRED CORN & SQUASH SALSA
- Cut the grilled corn kernels from the cobs.
- Dice the grilled yellow squash.
- Chop the grilled red onion.
- Remove the stem from the jalapeño and finely chop as much of the pepper as desired.
- For less heat, remove the seeds and inner membrane before chopping.
- Combine the grilled corn, squash, onion, and jalapeño with the quartered cherry tomatoes and chopped cilantro.
- Add the juice of 2 limes, 1 tablespoon extra-virgin olive oil, 1/2 teaspoon kosher salt, and 1/4 teaspoon coarse black pepper.
- Mix gently.
- Taste and adjust the lime juice, salt, and pepper as needed.
- Do not add the avocado yet.
MAKE THE CHILI-LIME HONEY BUTTER
- Combine the melted butter, honey, fresh lime juice, chili powder, and a small pinch of kosher salt in a small bowl.
- Whisk until combined.
- Set aside for finishing the cooked fish.
PREP THE MAHI-MAHI
- Pat the mahi-mahi fillets thoroughly dry with paper towels.
- Lightly coat all sides of the fish with 1 tablespoon avocado oil.
SEASON THE MAHI-MAHI
- Combine the chili powder, smoked paprika, garlic powder, cumin, kosher salt, black pepper, and fresh lime zest.
- Season the mahi-mahi evenly on all sides.
GRILL THE FIRST SIDE
- Place the seasoned mahi-mahi fillets onto the clean, hot grill grates.
- Close the lid and cook for approximately 3–5 minutes, depending on the thickness of the fillets.
- Avoid moving, pressing, or repeatedly lifting the fish while the first side develops a sear.
- Allowing the surface to properly sear will help the fish release more easily from the grill.
FLIP THE MAHI-MAHI
- Once the fish has developed good grill marks and releases cleanly from the grates, carefully flip each fillet using a wide fish spatula.
- Cook the second side for approximately 2–4 minutes.
CHECK THE INTERNAL TEMPERATURE
- Insert an instant-read thermometer into the thickest portion of each fillet.
- Cook until the mahi-mahi reaches an internal temperature of 145°F.
- The flesh should appear opaque and separate easily with a fork.
- Remove individual fillets as they reach temperature rather than allowing thinner pieces to overcook while waiting for thicker fillets.
FINISH THE SALSA
- Immediately before serving, gently fold the diced avocado into the charred corn and summer squash salsa.
- Taste once more and adjust the salt or lime juice if necessary.
- Avoid aggressively mixing the salsa so the avocado pieces retain their shape.
FINISH THE MAHI-MAHI
- Immediately after removing the mahi-mahi from the grill, lightly brush the top of each fillet with the warm Chili-Lime Honey Butter.
- Use a light coating.
- The butter is intended to add gloss, sweetness, acidity, and a final layer of chili-lime flavor without overpowering the fish.
SERVE
- Place each grilled mahi-mahi fillet on a plate.
- Spoon the Charred Corn, Squash & Avocado Salsa generously over one side of the fish, leaving some of the grilled surface visible.
- Serve with fresh lime wedges.
- Garnish with additional chopped cilantro if desired.
INDOOR METHOD
- Heat a large cast-iron skillet or grill pan over medium-high heat.
- Cook the corn, squash, jalapeño, and red onion in batches until browned and lightly charred.
- Prepare the salsa as directed.
- Wipe the skillet clean if necessary.
- Lightly oil and season the mahi-mahi.
- Cook approximately 3–5 minutes on the first side without disturbing it.
- Flip and cook another 2–4 minutes, adjusting the cooking time according to the thickness of the fillets.
- Cook until the thickest portion reaches an internal temperature of 145°F.
- Finish with Chili-Lime Honey Butter and serve with the Charred Corn, Squash & Avocado Salsa.
