Delicious Mediterranean Swordfish with Herb Butter

Few dishes can transport you to a coastal Mediterranean restaurant quite like perfectly cooked swordfish. With its meaty texture and mild flavor, swordfish makes an impressive yet surprisingly simple dinner option that even seafood skeptics enjoy.

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This swordfish steak recipe transforms this premium seafood into a restaurant-quality meal right in your kitchen. Whether you’re planning a special dinner or simply want to elevate your weeknight menu, a grilled swordfish steak delivers exceptional results with minimal effort. The combination of smoky char marks, herb-infused butter, and the fish’s natural sweetness creates a dish that’s both sophisticated and satisfying.

Ingredients List

For the Swordfish:
– 2 swordfish steaks (about 6-8 ounces each, 1-inch thick)
– 2 tablespoons olive oil
– 2 cloves garlic, minced
– 1 tablespoon fresh lemon juice
– 1 teaspoon lemon zest
– 1 teaspoon dried oregano
– ½ teaspoon sea salt
– ¼ teaspoon freshly ground black pepper

For the Herb Butter:
– 4 tablespoons unsalted butter, softened
– 1 tablespoon fresh parsley, finely chopped
– 1 tablespoon fresh chives, finely chopped
– 1 teaspoon fresh thyme leaves
– ½ teaspoon lemon zest
– 1 small garlic clove, finely minced
– ¼ teaspoon sea salt

For Serving:
– Lemon wedges
– Fresh herbs for garnish
– Cherry tomatoes, halved (optional)
– Capers (optional)

Step-by-Step Instructions

1. Prepare the herb butter: In a small bowl, combine the softened butter, parsley, chives, thyme, lemon zest, minced garlic, and salt. Mix thoroughly until well combined. Form into a log using plastic wrap, then refrigerate for at least 30 minutes.

2. Prepare the marinade: In a shallow dish, whisk together olive oil, minced garlic, lemon juice, lemon zest, dried oregano, salt, and pepper.

3. Marinate the fish: Place the swordfish steaks in the marinade, turning to coat both sides evenly. Let marinate for 15-30 minutes at room temperature. (Don’t marinate longer than 30 minutes as the acid in the lemon juice can begin to “cook” the fish.)

4. Preheat your grill: Heat your grill to medium-high heat (about 400-450°F). Clean and oil the grates to prevent sticking.

5. Grill the swordfish: Remove the steaks from the marinade and pat dry with paper towels. For the perfect grilled swordfish steak, place on the hot grill and cook for 5-6 minutes on the first side. Flip once and cook for another 3-4 minutes on the second side. The exact swordfish steak recipe timing depends on thickness, but swordfish is done when it reaches an internal temperature of 145°F or when the flesh is opaque and flakes easily.

6. Add the herb butter: Remove the swordfish from the grill and immediately top each steak with a slice of the chilled herb butter, allowing it to melt over the hot fish.

7. Rest and serve: Let the fish rest for 3-5 minutes, then garnish with additional fresh herbs, lemon wedges, and optional cherry tomatoes or capers.

Preparation & Cooking Time

– Preparation time: 15 minutes (plus 30 minutes for herb butter chilling)
– Marinating time: 15-30 minutes
– Cooking time: 8-10 minutes
– Total time: 1 hour
– Servings: 2

Tips & Variations

Flavor Enhancements:
– Add a tablespoon of capers to the herb butter for a briny kick
– Include 1 teaspoon of Dijon mustard in the marinade for extra depth
– Sprinkle a pinch of smoked paprika on the fish before grilling
– Finish with a drizzle of high-quality olive oil for richness

Ingredient Substitutions:
– No fresh herbs? Use 1 teaspoon dried herbs for every tablespoon of fresh
– Substitute lime juice and zest for lemon
– Use ghee instead of butter for a dairy-sensitive option
– Try mahi-mahi or tuna steaks if swordfish isn’t available

Alternative Cooking Methods:
– Oven-baked: Preheat oven to 400°F, bake for 10-12 minutes
– Pan-seared: Heat a cast-iron skillet over medium-high heat, cook 4-5 minutes per side
– Broiled: Place 4 inches from broiler, cook 4 minutes per side
– Air fryer: 380°F for about 8-10 minutes, flipping halfway

Common Mistakes to Avoid

1. Overcooking the fish: Swordfish dries out quickly when overcooked. Cook just until opaque and firm to the touch.
Solution: Use a meat thermometer and remove from heat at 140°F as it will continue cooking to 145°F while resting.

2. Marinating too long: The acidity in citrus will begin to “cook” the fish if left too long.
Solution: Limit marinating time to 30 minutes maximum.

3. Not patting dry before grilling: Wet fish won’t sear properly.
Solution: Use paper towels to remove excess moisture before grilling.

4. Flipping too early: Moving the fish before it naturally releases from the grill causes tearing.
Solution: Let it cook undisturbed until it releases easily from the grill.

5. Skipping the rest period: Cutting into the fish immediately releases juices.
Solution: Allow 3-5 minutes of resting time after cooking.

Storage & Reheating Tips

Refrigeration:
– Store leftover cooked swordfish in an airtight container for up to 2 days.
– Keep the herb butter refrigerated separately for up to 1 week, or freeze for up to 1 month.

Freezing:
– Not recommended for cooked swordfish as the texture deteriorates significantly.
– If necessary, freeze in airtight containers or vacuum-sealed bags for no more than 1 month.

Reheating:
– Gently warm in a 275°F oven for 10-15 minutes, covered with foil.
– For a quicker option, microwave at 50% power in 30-second intervals until just warm.
– Add a fresh slice of herb butter after reheating to restore moisture and flavor.

Conclusion

There’s something undeniably special about mastering a restaurant-quality seafood dish at home. This swordfish steak recipe combines simplicity with sophistication, making it perfect for both special occasions and elevated weeknight dinners. The herb butter melting over the hot fish creates a luscious sauce that pairs beautifully with the meaty texture and clean flavor of the fish.

Whether you’ve prepared it as a grilled swordfish steak or used one of our alternative cooking methods, you’ve now added a truly impressive dish to your culinary repertoire. Share your results in the comments below, and don’t forget to experiment with the variations to make this recipe truly your own!

FAQs

Q: How can I tell when swordfish is done cooking?
A: Swordfish should reach an internal temperature of 145°F and will be opaque throughout with a firm texture that flakes easily. Unlike salmon or tuna, swordfish should be cooked through rather than medium-rare.

Q: Is swordfish high in mercury?
A: Swordfish does contain higher mercury levels than some other seafood. While it’s perfectly fine for most adults to enjoy occasionally, pregnant women, nursing mothers, and young children should limit consumption.

Q: What sides pair well with this swordfish recipe?
A: Mediterranean-inspired sides work beautifully: try Greek salad, roasted vegetables, lemon rice, garlic bread, or a simple orzo pasta salad. Fresh asparagus or green beans also make excellent companions.

Q: Can I make this recipe if I don’t have a grill?
A: Absolutely! Follow the alternative cooking methods in the Tips & Variations section. A cast-iron skillet on high heat will give you results closest to grilling.

Q: How thick should my swordfish steaks be?
A: Aim for steaks about 1 inch thick. Thinner steaks will cook too quickly and may dry out, while much thicker cuts may require adjuste