Ajitsuke tamago are Japanese marinated eggs with a perfectly jammy yolk, boiled for exactly 6 minutes 30 seconds and steeped in a warm dashi, soy, and mirin marinade for at least two days. The result is a silky, umami-rich egg that elevates ramen, rice bowls, and more.
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Pull your eggs out of the fridge for 1-3 hours to get them to room temperature.
Prepare an ice bath in a large mixing bowl with about 2 cups of ice and 2-3 cups of water.
Get enough water boiling in a pot on high heat so that after you add the eggs there's at least one inch of water above the eggs. Once it hits a boil lower the temperature slightly so it maintains a low boil.
Gently lower the eggs into the boiling water one at a time so they don't crack. You can do this quickly with a large ladle so timing on all the eggs are even. Start your timer immediately for exactly 6 minutes 30 seconds.
When the timer's up, take out all the eggs as quickly as possible and transfer to the ice bath. Ladle the ice water over the eggs, and gently stir to evenly chill, for exactly 2 minutes. Remove the eggs from the bath, gently remove the shells, and set aside.
In a mixing bowl, make the dashi according to the packet instructions, so that you have 1 cup of prepared dashi. This should be done with warm water. If you're substituting dashi for just water, also make sure it's warm.
Add the sugar first, and stir so it dissolves, then add the rest of the marinade ingredients and stir to combine.
Pour the marinade into the bag, and add the eggs. The clip will help the marinade completely cover the eggs. If you don't have a bag or clip you can marinade in a bowl or tray, but it will take more liquid to completely cover the eggs. You can also use that method and just rotate the eggs every half day or so, but the results will be slightly different.
Transfer to the refrigerator for at least two days. Eat within 2-3 days as the optimum window, but remove from the marinade after 3 days if you can't use them all right away.
Store marinated eggs in the refrigerator in their marinade for 2–3 days for peak flavor; keep sealed and submerged. Remove from marinade after day 3 and store in an airtight container for up to 2 additional days.
large sealable plastic bags (gallon-sized) · bag clip or clip · ice bath (large mixing bowl) · kitchen timer
Room-temperature eggs cook more evenly and are less likely to crack when lowered into boiling water, ensuring consistent jammy yolks across the batch.
Less than 6:30 leaves the yolk too runny; more time makes the yolk firmer and grayer. Exactly 6:30 with immediate ice-bath chilling achieves the ideal creamy, jammy center.
Eat within 2–3 days for optimal flavor and texture. Remove from marinade after 3 days if you cannot use them immediately; they'll keep refrigerated for a few more days.
Regular (dark) soy sauce will work but will create a darker, slightly more intense marinade. Light soy sauce is milder and preserves the egg's appearance better.
Instant dashi is recommended for authentic umami flavor, but warm water works if dashi is unavailable; the marinade will be less flavorful but still tasty.
