Grilled Swordfish

When you’re in the mood for an easy seafood dinner that feels a little special, this Grilled Swordfish with Mustard… The post Grilled Swordfish appeared first on Recipe Girl®.

Food & Nutritions Mar 24, 2026 0 13 Add to Reading List

When you’re in the mood for an easy seafood dinner that feels a little special, this Grilled Swordfish with Mustard Basil Butter is a fantastic choice. Swordfish steaks are hearty, meaty, and perfect for the grill, and the simple mustard-basil butter adds big flavor with very little effort.

This recipe comes together quickly and is ideal for warm-weather dinners, casual entertaining, or anytime you want a restaurant-style fish dish at home. You might also like to try our recipes for Grilled Swordfish with Rosemary and Grilled Swordfish Steaks with Avocado Mayonnaise.

grilled swordfish with mustard basil buttter

About Swordfish:

Swordfish is a firm, mild-flavored fish with a dense, steak-like texture. Because of its thickness and sturdiness, it holds up beautifully on the grill and pairs well with simple seasonings and sauces like this mustard basil butter. Swordfish is high in protein and loaded with niacin, vitamin B12 and omega 3s. Swordfish is also low in fat and calories, and is cholesterol free, making it a fantastic choice if you’re on a low-fat, high protein diet like Keto, Paleo or Whole30.

ingredients displayed for making grilled swordfish with mustard basil butter

Ingredients Needed:

Vegetable oil: Prevents sticking on the grill
Butter: Rich, creamy base for the sauce
Dijon mustard: Tangy depth and zip
Fresh basil: Bright, herbaceous flavor
Swordfish steaks: Meaty, mild fish perfect for grilling (fresh, if you can find it!)
Salt and pepper: Simple seasoning

two photos showing mustard basil butter in dish and grilled swordfish on a plate

How to Make Grilled Swordfish with Mustard Basil Butter

In a small bowl, mix together the butter, Dijon mustard, and chopped basil.
Preheat grill or broiler and brush grates or pan with vegetable oil.
Season swordfish steaks with salt and pepper.
Grill fish 3 to 4 minutes per side, just until cooked through.
Transfer swordfish to plates and top each with a spoonful of mustard basil butter.
Garnish with fresh basil sprigs and serve.

Recipe Tips

Look for swordfish steaks that are about ¾-inch thick for best results. Fresh swordfish should not smell “fishy.” Make sure the reddish area of the meat is not brown.
Let the fish rest a minute or two before serving.
Use a fish spatula for easy flipping.
Don’t overcook—swordfish dries out if cooked too long.

overhead grilled swordfish steaks on plate with mustard basil butter

What to Serve with Grilled Swordfish

If you’re firing up the grill anyways, how about adding some grilled marinated shrimp to the meal too? Grilled Swordfish is delicious with Mixed Green Salad with Apple Cider Vinaigrette, or serve alongside Roasted Asparagus for a simple side. Brown butter rice is a great starchy side too.

grilled swordfish with mustard basil butter and asparagus on plates

Why You’ll Love This Recipe

It’s light, fresh, and flavorful.
It’s a great recipe for summer dinners and entertaining.
It’s a quick and easy recipe (ready in about 20 minutes).
This is the perfect fish for grilling or broiling.

grilled swordfish with mustard basil butter cut open with fork

Storage

Store leftovers in an airtight container in the refrigerator for up to 2 days. Reheat gently or enjoy chilled over salad.

Grilled Swordfish

Grilled swordfish topped with a tangy mustard basil butter—easy, light, and perfect for summer.

Course Main Course

Cuisine American

Keyword basil, butter, grilled fish, grilled swordfish, mustard, Swordfish

Prep Time 15

Cook Time 6

Total Time 21

Servings servings

Calories 432kcal

Author Lori Lange

Ingredients

4 tablespoons unsalted butter, at room temperature
2 tablespoons Dijon mustard
2 tablespoons finely chopped fresh basil
olive oil, for brushing the grill
Four 8-ounce swordfish steaks (¾-inch thick)
salt and pepper, to taste
fresh basil sprigs, for garnish

Instructions

Mix the butter, Dijon and fresh basil in a small bowl.
Preheat the BBQ or broiler; brush the grill or broiler pan with olive oil. Season the fish with salt and pepper. Grill fish just until cooked through, 3 to 4 minutes per side.
Transfer the swordfish to plates and top each with a spoonful of the mustard basil butter. Garnish with basil sprigs.