Ahi Tuna Tacos

5 from 5 votes
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Gorgeous Ahi Tuna Tacos that are perfectly seared with sesame seeds and served with a citrus mango guacamole!

You’ll want to eat these tacos with fresh cilantro, a squeeze of lime, and our homemade mango guac recipe.

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ahi tuna tacos on cutting board

Super Simple Ahi Tuna Tacos!

Oh hello, there beautiful tuna tacos. We are huge fans of tacos. We love beef tacos, vegan tacos, fish tacos, and chicken tacos. Pop any kind of meat or veggies into a taco shell and I’ll happily eat it!

We thought we’d get creative with seared ahi tuna tacos because we recently made seared ahi in the Fit Foodie kitchen and were obsessed.

Tips for Perfectly Seared Ahi Tuna

Let it marinate: the longer you let your ahi marinate in the ginger soy sauce, the better! We recommend at least 30 minutes, but 2 hours is gold!

Hot Heat + Oil: the goal with cooking ahi tuna is to NOT overcook. We prefer it rare to medium-rare so that it’s pink in the middle. Make sure to heat at least 2 tablespoons of olive oil over medium/high heat so you can get a quick hot sear on the outside.

how long to sear ahi tuna?

  • Rare: 30 seconds per side
  • Medium rare: 1 minute per side
  • Well done: 2 minutes per side
sliced seared ahi tuna

Fresh Toppings for these Tuna Tacos

Mango Guacwe used FFF’s mango guacamole on top of these tacos and it was so perfect. The flavors all complimented each other so well!

Other: In addition to the mango guac, we used a few key fresh ingredients to seal the deal. Here’s what you need:

  • fresh cilantro
  • red onion
  • lime juice
mango guacamole in bowl

All About the Tortilla

When it comes to tacos, the tortilla matters. Like, we are kind of tortilla snobs and I’m not mad about it. There are so many tortillas on the market such as corn, wheat, and even grain-free!

But, let me share with you our favorite, game-changing tortillas — Mission Street Taco Flour Tortillas. They are the perfect size for tacos and their texture is firm yet chewy. If you’re not a flour tortilla kind of girl, they also make a corn tortilla in the same “street taco” size.

Before serving: We suggest browning your tortillas just a bit. You can pan fry them, but what we like to do is turn our gas burner on and cook them over the flame to get them warm and a little bit crunchy.

ahi tuna tacos on cutting board
holding an ahi tuna taco
5 from 5 votes

Ahi Tuna Tacos

Gorgeous Ahi Tuna Tacos that are perfectly seared with sesame seeds and served with a citrus mango guacamole!
Prep: 45 minutes
Cook: 10 minutes
Total: 55 minutes
Servings: 4 -6
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Mango Guacamole

  • 4 medium avocados, ripe
  • 2 tablespoons fresh cilantro, minced
  • 2 tablespoons fresh lime juice, divided
  • 1/2 teaspoon salt, or more, to taste
  • 1 cup fresh mango, cubed

Seared Ahi Tuna

  • 1.5 lbs. ahi tuna steaks, 2 1.5-inch steaks
  • 1/3 cup soy sauce
  • 1 teaspoon red chili sauce
  • 1 teaspoon fresh grated ginger
  • 4 tablespoons sesame seeds
  • 4 tablespoons olive oil


  • 1/4 cup chopped cilantro
  • 1/4 cup minced red onion
  • 8-12 street taco flour tortillas


  • First, prepare the mango guacamole by mashing the avocado and then mixing it with cilantro, lime juice, salt, and mango chunks. Set aside.
  • Next, prepare the ahi tuna marinade. Combine the soy sauce, red chili sauce, grated ginger, and lime juice in a medium container. Add in the ahi tuna steaks and make sure to dip both sides. Let sit in the fridge for 30 minutes.
  • Remove ahi tuna steaks from the refrigerator and then remove from the marinade. Pour sesame seeds on a plate and coat every part of both tuna steak with sesame seeds
  • Heat a large skillet over medium/high heat and 2 tablespoons of olive oil. When the olive oil is fragrant, add one tuna steak to the pan and sear for 30 seconds to 2 minutes on each side.*
  • When ahi tuna steak is cooked, carefully slice the ahi tuna into thin strips.
  • Prepare the tacos by equally distributing tuna, cilantro, and red onion into tortillas. Then, top with 1-2 tablespoons of mango guacamole.

Tips & Notes

  • This recipe was updated on February 25, 2020.
  • Nutrition does not include mango guacamole.


Calories: 396 kcal, Carbohydrates: 29 g, Protein: 34 g, Fat: 17 g, Fiber: 2 g, Sugar: 3 g

Nutrition information is automatically calculated, so should only be used as an approximation.

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About Lee Funke

Lee is the founder of Fit Foodie Finds and based in Minneapolis, MN. She started this website in 2010 as a way to share her love for real food and wellness. The internet has changed so much since then and so has Fit Foodie Finds. Today we're a female-run recipe website publishing hundreds of tried and true recipes developed and tested by our team.

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April 15, 2024 10:14 pm

5 stars
This recipe was incredible- so much flavour! This will be a keeper recipe for us!

Audrey W
June 26, 2022 5:28 pm
Recipe Rating :

5 stars
Added some brown rice… 10/10

Audrey W
June 26, 2022 5:38 pm
Reply to  Audrey W

I should add that I tried this recipe because I bought a bunch of frozen ahi tuna by mistake (thinking I was getting salmon) and had to figure out what to do with them! I think I might be buying them again on purpose, lol!

January 21, 2022 10:00 pm
Recipe Rating :

5 stars
Super yum and feels so healthy! The only thing I’d note is I cooked mine for 1 min each side for medium rare and it was way way well done. Would do 30 seconds each side next time!