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a white bowl with slices of seared ahi tuna, limes, pickled red onions and edamame over brown rice
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How to Make Blackened Ahi Tuna

Flavorful ahi tuna with simple blackened seasoning. This easy fish recipe takes only 10-minutes to pull together! Perfect for a quick weeknight meal! Naturally Gluten-Free, Paleo & Whole30 compliant!
Prep Time5 mins
Cook Time5 mins
Total Time10 mins
Course: Main Course
Cuisine: American
Keyword: 30-minute meals, ahi tuna, blackened seasoning, seafood, weeknight meals
Servings: 2 people
Calories: 360kcal
Author: Elise Shivamber


  • 12 OZ Ahi Tuna Steaks (2 filets; typically 4-8 oz is a small serving for one person)
  • 2 TBSP Unsalted Butter

Blackened Seasoning

  • 2 TSP Smoked Paprika
  • ½ TSP Chili Powder
  • ¼ TSP Cayenne Pepper (OPTIONAL SPICY ONLY)
  • 1 TBSP Oregano
  • ½ TSP Garlic Salt


  • Combine blackened seasoning ingredients together in a small bowl.
  • Place ahi tuna steaks on a cutting board or plate. Dry all sides with a paper towel.
  • Sprinkle half of the seasoning on the top side of the ahi tuna steaks and rub it in.
  • Turn steaks over and sprinkle the remaining blackened seasoning on the other side of the steaks. Rub in completely on all sides (edges as well!).
  • Heat a cast iron or metal pan on the stove. Let heat for 2-minutes and then add butter.
  • Let butter melt and make sure the pan is hot (should be 4-5 minutes since first turned on).
  • Place seasoned ahi tuna steaks flat side down (either side is fine, but the larger flat side).
  • Let sear for 60-seconds (don’t move until 60-seconds are up).
  • Flip over (using tongs) and sear the other side for an additional 60-seconds.
  • After fully seared, remove from the heat and onto a cutting board. Turn off the stove.
  • Let the blackened ahi tuna steaks cool for 3-5 minutes.
  • Slice in thin pieces (about ¼-½” thick slices).
  • If making extra, make sure to place in fridge in an airtight container immediately. Should be in fridge no more than 2-3 days.


Typically, seared tuna is served at Medium-Rare temperature.
  • Rare: 30 seconds per side
  • Medium rare: 1 minute per side
  • Well done: 2 minutes per side
TIP! If you’re not sure your pan is hot enough, drop a small amount of water (think a teaspoon). If it sizzles right away it’s good to go!
Where to purchase:
In-Person: Trader Joe’s, Whole Foods, or try your favorite grocery store. (I will personally say I do not like the quality of ahi tuna from Trader Joe's.)
Thrive Market sells frozen ahi tuna steaks (that is where I prefer to purchase).
Catalina Offshore Products, based in San Diego, CA, is one of SoCal’s premier fresh and frozen seafood. They deliver to almost anywhere in the United States.


Serving: 1filet | Calories: 360kcal | Carbohydrates: 3g | Protein: 40g | Fat: 20g | Saturated Fat: 9g | Trans Fat: 1g | Cholesterol: 95mg | Sodium: 660mg | Potassium: 524mg | Fiber: 2g | Sugar: 1g | Vitamin A: 5343IU | Vitamin C: 1mg | Calcium: 64mg | Iron: 3mg