An umami-rich sauce elevates this Mahi Mahi with Miso Garlic Butter. The fish’s mild, meaty flavor pairs beautifully with a garlicky, sweet-and-salty miso brown butter that tastes like a restaurant finish.
Mahi mahi feels special without being fussy. Its firm, meaty texture makes it satisfying to cook and eat, and its mild flavor accepts many seasonings and sauces—perfect for quick pan-searing or grilling. That ease makes mahi mahi a great option for a weeknight that still feels a little elevated.
The secret here is the miso garlic butter. White or yellow miso adds a balanced blend of sweet, salty, and umami that deepens browned butter and garlic into a silky sauce worth spooning over everything. This finish brings out the best in the fish without overpowering its delicate flavor.
Ingredients for Mahi Mahi with Miso Garlic Butter
Quick overview of what you’ll need. See the recipe card for exact measurements.
- Mahi mahi – Four fillets, about 2 inches thick.
- Kosher salt and black pepper – Simple seasoning; feel free to add garlic or onion powder if desired.
- Olive oil – For searing; avocado oil or another high-heat oil can be substituted.
- Salted butter – Room temperature so it browns evenly and melts quickly.
- Miso – White or yellow miso is best; red miso can be quite salty.
- Garlic – Finely minced for the sauce.
- White wine – A dry white wine deglazes the pan and adds acidity; use chicken stock if you prefer a non-alcoholic option.
How to Make Mahi Mahi With Miso Garlic Butter Sauce
Scroll to the recipe card for a printable version and exact measurements.
- Prepare: Pat fillets dry and season with salt and pepper. Let them come to room temperature if refrigerated.
- Sear: Heat oil in a skillet over high heat until shimmering. Add fillets skin side up (or the flatter side if skinless). Press gently to ensure contact with the pan and form a crust. Lower heat to medium and cook 3–4 minutes until golden and the fish releases easily. Flip and cook 2–4 more minutes until done. Transfer to a platter and keep warm.
- Make miso brown butter: Melt butter in a small saucepan over medium heat, swirling occasionally. Cook until the butter foams and turns a light golden brown. Remove from heat and stir in the miso paste until smooth.
- Finish the sauce: Add garlic to the skillet and cook 2–3 minutes. Deglaze with white wine, scraping up browned bits. Whisk in the miso brown butter until slightly creamy.
- Serve: Spoon the miso garlic butter over the mahi mahi and serve immediately.
Tips for Buying, Prepping, and Cooking Mahi Mahi
These practical tips will help the recipe turn out perfectly every time.
- Choose fresh fish: Look for firm, moist flesh and a clean, mild scent. Avoid fillets with a strong fishy odor.
- Thaw properly: If using frozen fillets, thaw them fully in the refrigerator for even cooking.
- Dry the surface: Pat fillets dry so seasoning sticks and a crisp crust forms in the pan.
- Don’t overcook: Mahi mahi cooks quickly; remove it from heat as soon as it’s opaque and flakes easily to avoid dryness.
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Variations and Substitutions
Small swaps let you adapt the dish to your taste or what’s on hand.
- Use shallot instead of garlic: Shallots give a milder, sweeter flavor that works well with butter and miso.
- Add heat: A pinch of red pepper flakes in the sauce adds a pleasant kick.
- Try a tropical topping: For a fresher, island-style twist, serve mahi mahi with a mango salsa instead of the butter sauce.
How to Store and Reheat Leftovers
Store leftover mahi mahi in an airtight container in the refrigerator for 3–4 days. For longer storage, wrap tightly and freeze up to 2 months; thaw in the refrigerator before reheating.
To reheat without drying the fish, gently warm it in a 300ºF oven covered with foil or in a skillet over medium-low heat until heated through.
What to Serve With Mahi Mahi and Miso Garlic Butter Sauce
- Jasmine rice
- Crispy green beans (air fryer or roasted)
- Sautéed bok choy
- Grilled asparagus
- Mashed sweet potatoes
- Peas with brown butter and mint
- Cauliflower rice
More Seafood Recipes
- Miso glazed salmon
- Tortilla-crusted tilapia with avocado-mango salsa
- Homemade fish sticks
- Baked cod with lemon and vegetables
- Pan-seared halibut with brown butter garlic sauce
- Clams Casino
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Mahi Mahi with Miso Garlic Butter Recipe
Pin
Equipment
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1 large skillet
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1 fish spatula
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1 mixing bowl
Ingredients
- 32 ounces mahi mahi fillets, four 8-oz pieces, about 2-inch thick
- kosher salt, to season fillets
- black pepper, to season fillets
- 3 tablespoon olive oil
- 8 tablespoons salted butter, room temperature
- 1 teaspoon miso
- 5 garlic cloves, minced
- ¼ cup white wine
Instructions
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Pat the mahi mahi dry with a paper towel.
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Season both sides with salt and pepper and let sit 15–20 minutes if refrigerated.
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Heat oil in a large skillet over high heat until shimmering.
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Place fillets skin side up (or the flatter side if skinless) and press gently to ensure contact. Reduce heat to medium and cook 3–4 minutes until golden and the fish releases easily; flip and cook 2–4 more minutes until cooked through.
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While the fish cooks, melt butter in a small saucepan over medium. Swirl occasionally until it foams and then turns light golden brown. Remove from heat and stir in the miso paste.
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Transfer cooked fillets to a platter and keep warm. Add garlic to the skillet and cook 2–3 minutes. Stir in the wine and scrape up browned bits to deglaze the pan.
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Whisk the miso brown butter into the wine mixture until slightly creamy. Spoon the sauce over the mahi mahi and serve.
Notes
Use a fish spatula when flipping thin fillets to keep them intact.
Don’t flip until the fish releases easily from the pan—if it sticks, give it a little longer.
Nutrition
Nutrition information is automatically calculated and should be used as an approximation.