How To Dry Age Tuna?

Don’t get me wrong, cooking a fillet the night after you catch it won’t be any better than preparing it the following day, but if you can manage a few little details during the maturing process, you are in for a treat.

My method is by no means the “correct way,” but after much research and trial and error, I have discovered a failsafe way to do it.

You must first comprehend how this operates. Fish that has undergone dry age has had the moisture essentially removed, making it more delicate and flavorful. This is referred as as umami in Japan. You will need paper towels in order to try it. several paper towels

This is a fantastic method for preserving fish without needing to freeze it. If you freeze fish, you might find that as it defrosts, it gets a little mushy. This is so because water, which makes up around 60% of the flesh, expands and shreds the flesh when it freezes.

1) Lay your fillet(s) out on some towels and pat off any remaining moisture.

2) Spread out a couple fresh paper towel sheets, set the fish on top of them, and fold the towels inward to enclose the fillet.

3) Place on a plate, cover with plastic wrap, or place in a snap-lock bag; remove air before sealing. Refrigerate.

4) Repetition of steps 1-3 the next day.

5) After changing the wrap once, repeat the procedure after four days, and it ought to be effective for an additional three days.

6) I prefer to consume the fish after about 7 to 10 days have passed. You have the option to continue longer. Simply keep monitoring the paper, and replace it whenever it starts to become wet.

Footnote to Editor:

Joel sent this in for publication, and I figured I’d test it out. I learned about the technique for the first time in Hawaii when I was handed a piece of yellowfin tuna loin that was tightly wrapped in paper towels. It kept in perfect shape for several days. The procedure worked equally well on four decent-sized snapper fillets. The fish was delicious and we continued to eat it a week later. Take a shot at it! – GD

How to Handle and Cook Aged Fish Safely

Fish need a lot of attention and patience to age at home. If you don’t take the right precautions, the fish can spoil or you might get sick from eating it. But if you follow Chef Steiger’s clear instructions, you’ll soon be enjoying delicate, umami bliss.

  • First, Steiger advises that you keep the fillet meat away from any blood or viscera. “The fish should be gutted as soon as it is received, and the gills and any remaining blood along the spine should be cleaned and rinsed off.” Additionally, when opening the fish’s belly, exercise extreme caution to avoid puncturing any of the organs because the liquid that is contained inside could taint or infect the meat.
  • It is best to keep fish whole until you are ready to eat it. Try to keep the head, tail, and fillets on the bones after the viscera have been removed so they can continue to age, he advises. “The skin and bones will act as a barrier, reducing the meat’s exposure to oxidation.”
  • It’s crucial to keep the fish clean and properly wrapped as it ages. He advises washing the fish in salty water and then rinsing it off with clean, running water if there is any slime or blood on it. “After cleaning, make sure to pat the fish dry with a clean paper towel because moisture encourages the growth of harmful bacteria. After drying, place paper towels within the gill and belly cavities. As the fish ages, this will absorb any extra moisture, keeping the fish dry and clean. To catch any blood that may escape the spine after the head or tail have been removed, wrap the ends in paper towels. The entire fish should then be wrapped in waxed butcher paper and plastic wrap. The oxidation process can be slowed down by wrapping as securely as possible and pushing out any air pockets.”
  • Last but not least, be sure to regularly inspect your fish for aging or rotting indicators. The fish should not turn black or brown, should remain dry, should have clean eyes, and spots with crimson blood should remain red. Do not eat the fish if it starts to smell unpleasant, he advises. “Fish should be thrown away if it smells nasty, cheesy, rotten, or otherwise offensive. Other [unfavorable] signs to watch out for include a covering of slime (on the interior or outside of the fish), the meat or blood turning brown or black, or the eyes getting clouded.” He advises letting each fish age for 24 to 48 hours. After the first day, check to see if it still looks okay, and then rewrap the fish in fresh paper and plastic. This will prevent the fish from becoming bad on day two as it ages.

Above the initial freezing point, dry-age tuna (IFP)

Through a continuous dry aging process and technology to age and preserve tuna above initial freezing point, which removes lactic acid (sour flavor) from tuna flesh – tuna produces lactic acid just as a result of the intense struggle it experiences when being caught – and through tuna its own enzyme decomposes muscle fibers to convert protein into amino acids (sweet). The water in the tuna evaporates throughout the dry-aging process, concentrating the flavor. King Son’s dry aging method can effectively preserve tuna meat while also enhancing its flavor and sweetness. This reduces the need for seasoning, allowing consumers to enjoy more delicious and healthful sashimi.

The internal fat distribution of the flesh becomes more uniform and the tendons are easier to chew after the traditional Japanese aging process is completed on tuna. However, a significant amount of weight is lost during the process; of the 10 kg of tuna that were processed, only 6 kg were edible and the remaining 4 kg were lost to drying due to water evaporation.

A7 Intelligent Foodtech Controller is incorporated into the King Son Convertible IFP Aging Chiller, which is designed in Constant Temperature and Humidity Multiple Point Monitor, Servo Control Technology, and can age tuna at low temperatures above initial freezing and high humidity while controlling temperature fluctuation at +-0.3 degC. This accelerates maturation to three days from start to finish and results in more tenderness texture, aroma, and sweetness.

King Son Convertible IFP Aging Chiller’s distinctive selling advantage is that as tuna ages, it becomes more supple, has a unique sweetness increase, and tastes like it has two flavors at once.


First, let’s discuss why we would want to do this before moving on to the how. Did you know that certain steaks are matured for several months before being sold for grilling? In order for the exquisite meat’s natural flavor and texture to emerge, chemical reactions must have enough time to take place. Fish of most species are similar and have additional advantages. Although it’s a frequent misconception that “fresh caught” fish directly from the water offers the greatest quality meat, doing so does not necessarily result in a superior dining experience.

Aging fish takes precise knife work, a controlled environment, and a few measures to guarantee the fish stays clean, just like butchering beef. Fish that has been aged not only tastes better, but the texture also changes. The meat becomes denser and better for cooking or eating raw as the water leaves it, which results in a deeper flavor and a more enjoyable mouthfeel.

“By day 3, water loss causes the meat to become thicker but firmer. The proteins, lipids, and glucose glycogen in the meat start to be broken down into amino acids, fatty acids, and sugars by the enzymes in the muscle cells. Additionally, glutamate, the essential component that creates umami flavor, has dramatically increased.” Michelin Directory


When it comes to dry aged steak, you generally anticipate many weeks of curing, an exterior crust that may contain mold, and a significant flavor change that may include some funkiness.

Can fish become that dry aged? Yes, however the primary objective here is to prolong its freshness and eliminate more blood, filth, and moisture. Liao consistently reminded Foodbeast that as a result of dry aging fish, you’ll notice a lack of a strong fishy scent, a cleaner flavor, and a little firmer texture.

To produce that effect, most tiny fish are simply dry aged for a few days, although larger portions of huge fish, such bluefin tuna, can take a few weeks or longer.

How long can tuna be dried?

We have consumed bluefin tuna for up to 100 days, and the outcome was unlike anything we have ever tasted in a positive way. For a salmon, we would only want to dry age our fish in the steak locker for a maximum of 50 days. On the other side, we would advise as few as 15 days for smaller dry aged fish.

How is fresh tuna aged?

  • After being wrapped, the fish is put in a sizable plastic bag and the air is completely sucked out of it with your lips (this is typical procedure in most restaurants) before being tied up.
  • The Akami would be properly matured and prepared for consumption after two days.

Is tuna that has been dried edible?

When Jeremy Blutstein prepares tuna, it’s similar to how most people prepare beef, and it’s delectable.

The third Edible Eat of the Week is here! Edible Eat of the Week is a recurring series that highlights unique, seasonal foods and the people who make them to celebrate the bounty of the East End.

The Plot: Jeremy Blutstein is making mouths swim by applying to tuna what most people apply to beef.

The seasoned chef at Showfish in Montauk purchases 34-ounce bone-in tuna ribeye steaks from Gosman’s pier. The amazing fish steaks are then aged for eight days, just like a steak, with fennel pollen (leftover from the previous year, he remarks) and allowed to brood. Fish-related ruminations are the outcome. Fish “pretending to be meat,” in his words.

The price of the tuna steaks is currently $109; of course, this price is subject to change. To be honest, that hardly seems excessive given the price of dry-aged beef. The last plate is cut but served on the bone; it is exquisite and a mix of steakhouse sophistication and tongue-in-cheek kitsch. The flavor is enhanced by the dry age, while the inside retains its ruby crimson lusciousness. This is tuna at its purest, most basic level. The huge fish and the characteristics that already make it so appealing to steak lovers are concentrated by dry aging. Actually, dry aging makes sense. Although in the 2019 market we may need to recast that as the rich man’s steak, tuna has always been the poor man’s ribeye.

It is not necessary to list the exact analogy used by chef Blutstein to describe how the dry-aged tuna sells, but rest assured that it is a staple menu item. Blustein thrives where fun and ingenuity meet, and the tuna ribeye is no different. At Gurney’s Star Island Resort & Marina, where chef Blutstein pays a serious respect to Montauk’s turquoise waters, you can catch your catch of the day this summer. Friends, it’s tuna season. What a wonderful season this is.

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