Key Takeaways:
- Blackened tuna steak is a quick, high-heat seafood dish with a spicy Cajun crust and tender pink center.
- The best seasoning blend includes paprika, cayenne, garlic powder, onion powder, oregano, salt, and black pepper.
- A cast iron or carbon steel pan gives the best sear and crust development.
- Tuna should be cooked quickly over very high heat to avoid overcooking the center.
- Ideal doneness is medium-rare, with a warm pink or slightly translucent center.
- High smoke point oils like avocado oil or clarified butter are best for blackening.
- Resting the tuna briefly before slicing helps preserve juiciness and texture.
Overview
Blackened tuna steak is a high-heat seared tuna coated in Cajun-style spices like paprika, cayenne, garlic powder, onion powder, oregano, salt, and black pepper. The seasoning forms a dark crust when cooked in a hot skillet or cast iron pan, while the inside stays rare to medium-rare and tender. It is typically cooked in 1–3 minutes per side using a high smoke point oil such as avocado oil or butter blend for a flavorful crust and juicy center.
Blackened Tuna Steak is coated in a bold, spicy dry rub, then seared and quickly cooked in a hot skillet, creating a perfectly blackened crust while keeping the center tender and medium-rare. Serve it with Tropical Salsa for a refreshing “cool” contrast that balances the heat of the seasoned tuna.
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Now that’s a beautifully fresh tuna steak. We spend our winters in Florida, where a local fisherman runs a weekend roadside seafood stand. Nearly every weekend, we stop by for stone crab, grouper, and tuna—all caught fresh that day.
When I brought this tuna steak home, I vacuum-sealed it and froze it immediately. Even after freezing, it still looks and tastes like freshly caught ahi tuna, making it perfect for preparing restaurant-quality ahi tuna steaks.
SIS (simple is smart) recipe for seasoning for tuna steaks
To keep tuna steak seasoning simple, combine 1 tablespoon each of paprika and Old Bay seasoning, along with 1/2 teaspoon each of ground ginger, oregano, and mustard powder, then finish with 1/4 teaspoon cayenne pepper. This level of cayenne creates a noticeably spicy flavor, so reduce it if you prefer a milder, non-spicy tuna steak. Generously rub the seasoning mixture all over the fish, then let it rest at room temperature for a few minutes while you preheat a grill pan or skillet. This blend delivers bold, balanced flavor and is one of the best ways to season tuna steak. You can also save time by using a pre-mixed spice blend such as Bearded Butcher Blend Cajun seasoning.
How to make tuna steak?
A hot grill pan or cast-iron skillet is essential when preparing a blackened tuna steak. You want the fish to hit a properly heated pan so it can sear instantly. This creates that signature blackened crust while locking in the natural juices and flavor.
For a rare finish, cook the tuna steak for about 1½ minutes per side. For medium-rare, aim for 2 minutes per side. For medium-well, cook for 2½ to 3 minutes per side. In this recipe, I cooked the steak to medium doneness.
Farmer Fred prefers his blackened tuna steaks very rare, almost barely seared. I always tell him it ends up looking more like a thick slice of sashimi than a traditional tuna steak.
Don’t skip the tropical salsa—it pairs perfectly with the bold, smoky flavor of the blackened tuna and brings a fresh, sweet finish to the dish.
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Blackened Tuna Steak
Ingredients
- 8 ounces two 4 ounce tuna steaks
Blackening
- 1 Tbsp sweet paprika
- 1 tbsp old bay seasoning
- ½ tsp ground dried ginger
- ¼ tsp cayenne pepper
- ½ tsp oregano
- ½ tsp dry mustard
- 1 tsp black pepper
- 1 tsp garlic powder
- 1 tsp onion powder
Instructions
Make the Blackening Dry Rub
- Mix together all of the blackening/rub ingredients. Note you will have rub left over for more steaks.
- Coat each tuna steak with the dry rub
- Preheat a skillet until it is hot. Add about a tsp of oil to the bottom of the skillet.
- Put the steaks into the hot pan.
- Cook the steak for 1 1/2 minutes on each side for a rare steak2 minutes on each side for a medium-rare steak and 2 1/2 to 3 minutes on each side for a medium to medium-well done steak.
Video
Notes
Nutrition
FAQ
What does Blackened Mean on Tuna?
Can Tuna be Dark?
Is Blackened Fish Healthy?
How do you Blacken Meat?
Do you use Oil or Butter to Blacken Fish?
Do you use Oil when Blackening Fish?
Final Thoughts
Blackened tuna steak is one of those recipes that proves simple ingredients can deliver bold, restaurant-quality flavor in minutes. With its perfectly seared crust and tender, rare center, this dish is ideal for quick weeknight dinners or impressive meals when you want something special without extra effort.
The key to success lies in using high-quality tuna, a well-balanced blackening spice blend, and a very hot skillet to lock in flavor and create that signature crust. Whether you serve it over rice, salad, or alongside fresh vegetables, this recipe is versatile, protein-rich, and incredibly satisfying.
If you’re looking for a fast, flavorful seafood option that never disappoints, blackened tuna steak deserves a permanent spot in your recipe rotation.
Excellent recipe.Made this tonight for dinner. Even my picky husband enjoyed it. Thank You
This is also a favorite of Farmer Fred. Thank you for your comment.
Delicious.
Loved this rub! Best recipe I have found.
Use this recipe to make blackened ahi tuna BLT’s fabulous!
Wow that sounds amazing.
The tuna is 45mg of salt but adding all that seasoning is adding hundreds of MG of sodium
Thank you for pointing that out. Yes, the old bay will add a lot of extra sodium. If you are on a sodium-restricted diet leave the old bay out of the seasoning.