Blackened Tuna Steak
Perfectly seared tuna steaks with a spicy, smoky Cajun crust. The inside stays tender and rare, creating a delicious contrast of texture and flavor. A restaurant-quality meal ready in under 15 minutes.
For 4 servings
4 steps. 5 minutes total.
- 1
Step 1
- a.Prepare the Blackening Spice Rub
- b.In a shallow dish or on a plate large enough to fit a tuna steak, combine the smoked paprika, cayenne pepper, garlic powder, onion powder, dried thyme, dried oregano, black pepper, white pepper, and salt.
- c.Whisk the spices together with a fork until they are thoroughly mixed and uniform in color.
- 2
Step 2
- a.Coat the Tuna Steaks
- b.Remove the tuna steaks from the refrigerator and pat them completely dry with paper towels. This step is crucial for achieving a perfect crust.
- c.Let the steaks sit at room temperature for about 10 minutes to ensure even cooking.
- d.Press each side of the tuna steaks firmly into the spice mixture, ensuring a thick, even coating covers the entire surface. Gently shake off any loose excess.
- 3
Step 3
- a.Sear the Tuna Steaks
- b.Place a large cast-iron skillet over high heat and let it preheat for 3-4 minutes until it is extremely hot and you see wisps of smoke.
- c.Turn on your kitchen's exhaust fan or open a window, as this process will create significant smoke.
- d.Add the avocado oil to the skillet; it should shimmer instantly. Carefully place the spice-coated tuna steaks in the hot pan, leaving space between them.
- e.Sear for 90 seconds on the first side without moving the steaks. This creates the signature dark, crisp crust.
- f.Using tongs, flip the steaks and sear for another 90 seconds on the other side for a rare center. For medium-rare, cook for 2 to 2.5 minutes per side.
- 4
Step 4
- a.Rest and Serve
- b.Immediately remove the tuna from the skillet and transfer to a clean cutting board.
- c.Let the steaks rest for 5 minutes. This allows the juices to redistribute, ensuring a tender and moist interior.
- d.Slice the tuna against the grain into 1/2-inch thick pieces or serve the steaks whole. Serve immediately with your favorite sides.
What to keep in mind.
6 tips from the recipe — small details that make a real difference to the final dish.
- 1For the best crust, use a well-seasoned cast-iron skillet. It retains and distributes heat better than any other pan.
- 2Ventilation is key! The 'blackening' process creates a lot of smoke. Open windows and use an exhaust fan to avoid setting off your smoke alarm.
- 3Use high-quality, sushi-grade tuna. Since the inside is served rare, the quality of the fish is paramount for both flavor and safety.
- 4Do not overcook the tuna. The goal is a dark, spicy crust with a cool, rare interior. Overcooked tuna will be dry and tough.
- 5Bring tuna to room temperature for about 10-15 minutes before cooking. This helps it cook more evenly.
- 6Serve with a cooling contrast, such as a mango salsa, avocado crema, or a simple squeeze of fresh lime juice to balance the heat.
Adapt it for your goals.
Different Fish
This blackening spice rub and technique work wonderfully with other firm fish like salmon, swordfish, or mahi-mahi. Adjust cooking time based on the thickness of the fillet.
Less SpicyLess Spicy
To reduce the heat, decrease the cayenne pepper to 1/4 teaspoon or omit it entirely. You can also use sweet paprika instead of smoked for a milder flavor.
Herbaceous TwistHerbaceous Twist
Add 1/2 teaspoon of finely chopped fresh rosemary or parsley to the spice blend for a fresh, herbal note.
Grilled VersionGrilled Version
For a smokier flavor, cook the coated tuna steaks on a preheated, well-oiled grill over high heat for the same amount of time.
Why this is on our healthy list.
Excellent Source of Lean Protein
Tuna is packed with high-quality protein, which is essential for muscle building, tissue repair, and maintaining a healthy metabolism.
Rich in Omega-3 Fatty Acids
The omega-3s (EPA and DHA) found in tuna are crucial for brain health, reducing inflammation, and supporting a healthy cardiovascular system.
Supports Immune Function
Tuna is a great source of selenium, an antioxidant that plays a vital role in immune system health and protecting cells from damage.
Boosts Energy Levels
High in B-vitamins, especially B12, tuna helps your body convert food into energy, combating fatigue and supporting nerve function.
Frequently asked questions
One 6-ounce serving of this Blackened Tuna Steak contains approximately 280-300 calories, depending on the exact size of the steak and the amount of oil absorbed.