This easy recipe for Blackened Balsamic Tuna Steaks combines spicy Cajun blackening and a sweet balsamic vinaigrette for bold, balanced flavor. Prep is simple and the steaks cook quickly, making this a great weeknight or special-occasion meal.
This upscale-seeming tuna steak is actually very easy to make. Marinate the ahi briefly in a simple balsamic mixture, press on a bold blackened spice rub, then sear the steaks hot and fast. The outside forms a savory crust while the center stays tender and buttery.
Why We Love This Tuna Steak Recipe
- Restaurant-quality at home: The combination of sweet balsamic and spicy blackening delivers a dinner that feels elevated without extra fuss.
- Fast: Minimal prep and quick cooking mean you can have a flavorful fish dinner in about 30 minutes.
- Versatile: Serve the tuna as a main course, add it to salads or tacos, or use sliced tuna in sandwiches.
- Easy cleanup: Few utensils and a quick pan sear keep cleanup simple.
Recipe Ingredients
A few quality ingredients make this dish shine: fresh ahi tuna, a simple balsamic marinade, and a bold blackened spice mix. The ingredient list is short and adaptable to taste.
- For the Tuna: Two fresh ahi tuna steaks and vegetable oil for searing.
- For the Marinade: Balsamic vinegar, olive oil, honey, and salt.
- For the Blackened Seasoning: Paprika, cayenne, garlic powder, dried thyme, dried oregano, salt, and freshly ground black pepper.
What Is Ahi Tuna?
“Ahi” refers to yellowfin and bigeye tuna. Both are prized for their firm texture and clean flavor. Yellowfin works well both raw and cooked; bigeye has a bit more fat and a richer mouthfeel. For this recipe, searing the outside and keeping the center slightly rare or medium-rare produces the best texture.
How To Cook Tuna Steaks
- Marinate: Pat the steaks dry and place in a zip-top bag or shallow dish. Whisk balsamic vinegar, olive oil, honey, and salt; reserve half the mixture for serving. Pour the rest over the tuna, seal, and marinate 10 minutes (or refrigerate overnight).
- Make the seasoning: Mix paprika, cayenne, garlic powder, thyme, oregano, salt, and pepper in a small bowl. Remove tuna from the marinade, pat dry, and press the spice mix onto all sides.
- Sear: Heat a cast-iron skillet over medium-high until very hot. Add 2 tablespoons vegetable oil, then add the steaks. Sear about 2 minutes per side for medium-rare (adjust time for thicker or thinner steaks).
- Rest and slice: Transfer the tuna to a cutting board and rest 3 minutes. Slice thinly and serve with the reserved balsamic sauce.
Recipe Tips & Variations
- Steak thickness: Aim for steaks at least 1 inch thick; thinner steaks cook too quickly and can dry out. If thinner, reduce sear time to about 1 minute per side.
- Sushi-grade tuna: For best texture and safety when serving tuna mostly rare, choose sushi- or sashimi-grade ahi.
- Oil choice: Use a high-heat oil such as vegetable or canola for searing; avoid extra-virgin olive oil at high temperatures.
- Seasoning: If you prefer a milder flavor, skip the cayenne or reduce it; store-bought blackening blends also work well.
- Slicing: Slice thinly across the grain for the most tender bites.
Serving Suggestions
Pair the tuna with roasted or Parmesan-crusted potatoes, grilled summer vegetables, or a crisp slaw for contrast. A light green salad or steamed asparagus are excellent choices. Serve the reserved balsamic vinaigrette on the side for drizzling.
How to Store and Reheat Leftovers
- To store: Place leftovers in an airtight container and refrigerate for 2–3 days or freeze up to 3 months.
- To reheat: Re-sear quickly in a hot pan or on a grill for just a minute per side until warmed through, to avoid overcooking.
More Seafood Recipes
- Salmon Florentine
- Old Bay Roasted Salmon
- Beer Battered Fish
- Crab Cake Sliders
- Shrimp Salad with Avocados
Blackened Balsamic Tuna Steaks
Ingredients
For the Tuna
- 2 fresh ahi tuna steaks (about 6 ounces each)
- 2 tablespoons vegetable oil (for searing)
For the Marinade
- 1/4 cup balsamic vinegar
- 1 tablespoon olive oil
- 1 tablespoon honey
- 1/2 teaspoon salt
For the Blackened Seasoning
- 1 teaspoon paprika
- 1/2 teaspoon cayenne pepper (adjust to taste)
- 1/2 teaspoon garlic powder
- 1/2 teaspoon dried thyme
- 1/2 teaspoon dried oregano
- 1/2 teaspoon salt
- 1/4 teaspoon freshly ground black pepper
Instructions
- Pat the ahi tuna steaks dry with paper towels and place them in a large zip-top bag or shallow dish.
- In a small bowl whisk together the balsamic vinegar, olive oil, honey, and salt. Reserve half the mixture in a small bowl for serving.
- Pour the remaining marinade over the tuna, seal the bag, and massage to coat. Let stand 10 minutes at room temperature or refrigerate up to overnight.
- In a small bowl combine the paprika, cayenne, garlic powder, thyme, oregano, salt, and pepper.
- Remove the tuna from the marinade and pat dry. Press the spice mix onto all sides of the steaks.
- Heat a cast-iron skillet over medium-high until very hot. Add 2 tablespoons vegetable oil and swirl to coat.
- Place the tuna steaks in the pan and cook about 2 minutes per side for medium-rare, adjusting time for thickness and desired doneness.
- Transfer the steaks to a cutting board and let rest 3 to 5 minutes, then thinly slice and serve with the reserved balsamic sauce.
Equipment
- Measuring cups and spoons
- Mixing bowls
- 10-inch cast iron skillet or heavy frying pan
Notes
- Thickness: Steaks about 1 inch thick work best; thinner steaks need shorter sear times.
- Tuna selection: Choose fresh or properly thawed sushi-grade tuna for best texture.
- Oil: Use a high-heat oil for searing to get a proper crust.
- Timing: Since the tuna cooks quickly, have sides ready before you sear the fish.
Nutrition
Nutritional info is an estimate and provided as a courtesy. Values may vary according to ingredients and portions used.