Kalyn's Kitchen

Grilled Mahi Mahi with Lemon and Capers

Grilled Mahi Mahi with Lemon and Capers is a delicious summer dinner, and Mahi Mahi is a perfect firm fish to cook on the grill! 

PIN Grilled Mahi Mahi with Lemon and Capers!

Grilled Mahi Mahi Recipe with Lemon and Capers found on KalynsKitchen.com

I think Mahi Mahi is a greatly under-used fish, and it’s one of my favorite types of fish to use for cooking on the grill. This Grilled Mahi Mahi with Lemon and Capers is something I first made back in the days when I was grilling fish on a houseboat at Lake Powell, long before anyone thought about sustainable seafood, but the wild-caught Mahi Mahi I get from Costco is classified as a good choice, (and Mahi Mahi is not dolphin, in case anyone is wondering.)

You may not think of capers as being an ingredient that goes with fish, but I love the tang they added to this recipe. I think this flavorful marinade with lemon juice, lemon zest, capers, Dijon, and just a touch of onion and garlic flavor would be good on just about any type of fish. And if anyone is interested, the salad served with the Mahi Mahi in this photo is Sauteed Chickpea Salad with Roasted Red Peppers, Capers, Mint, and Sumac, now updated with a much better photo, so check that out if you’re a chickpea fan. Or check out the side dish suggestions below if you want to make this a low-carb meal.

Why did I use dried herbs in the marinade?

I love to use fresh herbs in cooking, but in marinades like this I sometimes use ingredients like onion powder, garlic powder and dried parsley because they dissolve a bit more into the liquid of the marinade and don’t leave clumps of onion, parsley, or garlic on the fish or meat when it’s grilled.  If you prefer to use fresh onions, garlic, or parsley, I would increase the amounts a little.

Grilled Mahi Mahi Recipe with Lemon and Capers found on KalynsKitchen.com

How to Make Grilled Mahi Mahi with Lemon and Capers:

(Scroll down for complete recipe with nutritional information.)

  1. If you’re using frozen Mahi Mahi it’s best to thaw overnight in the fridge, but in a pinch you can thaw them in cold water. The Mahi Mahi I get at Costco comes individually wrapped like this, and although I know it’s extra packaging it does make them handy to keep in the freezer.
  2. Zest the lemon and squeeze the juice. Chop up the capers a little and then whisk together the lemon zest, lemon juice, Dijon, chopped capers, olive oil, garlic powder, onion powder, dried parsley, and black pepper.
  3. Put the thawed fish pieces in a small Ziploc bag and pour in the marinade. Let fish marinate in the fridge for 2-3 hours. (Don’t leave it much longer than that or the lemon juice will start to “cook” the fish.
  4. Sorry I didn’t get better photos of the fish on the grill!  Remove fish from the marinade and grill about 10 minutes per inch of thickness. 
  5. I cooked these pieces about 9 minutes total.

Grilled Mahi Mahi Recipe with Lemon and Capers found on KalynsKitchen.com

Make it a Low-Carb Meal:

For a low-carb dinner this would be delicious with Asparagus and Radish Salad with Feta and World’s Easiest Grilled Vegetables.

More Tasty Ideas for Cooking Fish:

Soy-Grilled Mahi Mahi with Korean Dipping Sauce 
Kalyn’s Lake Powell Fish Marinade 
Baked White Fish with Pine Nut, Parmesan, and Pesto Crust 
Spicy Red Fish Stew from Kalyn’s Kitchen
Grilled Spicy Tuna from Kalyn’s Kitchen

Grilled Mahi Mahi Recipe with Lemon and Capers found on KalynsKitchen.com

Grilled Mahi Mahi with Lemon and Capers

Yield 4 servings
Prep Time 15 minutes
Cook Time 10 minutes
Additional Time 2 hours
Total Time 2 hours 25 minutes

This Grilled Mahi Mahi with Lemon and Capers is a delicious idea for grilled fish!



  • 4 Mahi Mahi filets
  • 1 T oil for oiling grill grates
  • lemon pieces for serving fish (optional)

Marinade Ingredients

  • 1 tsp. lemon zest (more or less to taste)
  • 3 T fresh squeezed lemon juice
  • 1 tsp. Dijon mustard
  • 1/4 cup extra virgin olive oil
  • 1 T capers, chopped (or more if you really like capers)
  • 1 tsp. garlic powder
  • 1 tsp. onion powder
  • 1 tsp. dried parsley
  • 1/2 tsp fresh ground black pepper


  1. Thaw frozen Mahi Mahi overnight in the fridge.
  2. Let the fish come to room temperature, drain in a colander, and pat dry when you’re ready to cook.
  3. Zest the lemon, squeeze lemon juice and chop the capers.
  4. Whisk together the marinade ingredients.
  5. Put thawed Mahi Mahi filets into Ziploc bag or plastic container with a snap-tight lid.
  6. Pour marinade over, and allow to marinate 2-3 hours. (Don’t leave it longer than that for best results.)
  7. When you’re ready to cook the fish, spray grill with nonstick spray or brush with oil, then preheat the grill to high.
  8. When grill is hot,  put fish on, with the top side facing down.  (For a gas grill, I lower heat to medium high when I put the fish on.)
  9. To get nice grill marks, lay fish at an angle to grill grates, then rotate fish a quarter turn after about 3 minutes.
  10. Cook about 3 minutes more on same side, then turn carefully and cook 3-4 minutes on other side.
  11. Total cooking time will be about 10 minutes per inch of thickness of the fish, depending on how hot your grill is.
  12. Fish is done when it feels firm, but not hard, to the touch.
  13. Serve hot, with additional lemons to squeeze over if desired.


Recipe created by Kalyn.

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 394Total Fat: 20gSaturated Fat: 3gTrans Fat: 0gUnsaturated Fat: 16gCholesterol: 174mgSodium: 290mgCarbohydrates: 4gFiber: 1gSugar: 1gProtein: 49g

Nutrition information is automatically calculated by the Recipe Plug-In I am using. I am not a nutritionist and cannot guarantee 100% accuracy, since many variables affect those calculations.

If you make this recipe I'd love to hear how it turns out. Leave a star rating or share on social media with the hashtag #KALYNSKITCHEN, thanks!

Low-Carb Diet / Low-Glycemic Diet / South Beach Diet Suggestions:
Grilled Mahi Mahi with Lemon and Capers is not only delicious, it’s perfect for any low-carb eating plan or any phase of the original South Beach Diet.

Find More Recipes Like This One:
Use Grilling Recipes to find more grilled fish recipes like this one.Use the Diet Type Index to find recipes suitable for a specific eating plan. You can also Follow Kalyn’s Kitchen on Pinterest to see all the good recipes I’m sharing there.

Pinterest image of Grilled Mahi Mahi with Lemon and Capers

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    27 Comments on “Grilled Mahi Mahi with Lemon and Capers”

  1. Sonya, my pleasure. So glad you liked it.

  2. This was delicious, thank you for the great recipes!

  3. So glad you enjoyed it!

  4. I just wanted to say, I made this tonight and it was perfect! Light and easy for the summertime. I served it with a simple Italian-style salad of shredded cabbage, onion and carrot marinated in lemon juice, olive oil and sea salt, plus some grilled toast and fresh summer tomatoes. Yum! Pinning it so I won't forget it.

  5. Renee, my pleasure. So glad you're enjoying the recipes.

  6. I made this recipe tonight and it was phenomenal. Yum! Your recipes are always on point and delicious. Thank you for this fabulous resource for healthy recipes.

  7. Thanks Mary!