Japanese Ramen Soft-Boiled Egg (Ajitsuke Tamago)
Master the perfect jammy, golden-orange yolk with this classic Ajitsuke Tamago recipe. These marinated ramen eggs are savory, tender, and essential for any bowl.
Ajitsuke Tamago, or marinated soft-boiled egg, is the crowning jewel of a great bowl of ramen. Achieving that signature custard-like yolk requires precise timing and a quick transition to an ice bath, followed by an overnight soak in a savory blend of soy sauce and mirin. This simple technique transforms a basic ingredient into a rich, flavorful topping that elevates homemade noodles to restaurant quality.
Ingredients
- 4 large eggs
- 60 ml soy sauce
- 45 ml mirin
- 30 ml water
- 10 g sugar
- 0.5 g fish stock seasoning
Instructions
- 1Boil the eggs

Bring a pot of water to a rolling boil. Using a strainer, carefully lower the eggs into the boiling water and set a timer for exactly 6 minutes to achieve a perfect soft-boiled yolk.
Tip: Using a strainer prevents the eggs from cracking when hitting the bottom of the pot. - 2Cool the eggs

Immediately transfer the boiled eggs from the pot into a bowl filled with ice water. This halts the cooking process, ensuring the yolk stays soft and creamy while making the shells easier to peel.
Tip: Using an ice bath is essential; do not skip this step or the eggs will continue cooking from residual heat. - 3Peel the chilled eggs

Keep the eggs in the cold bath and gently peel the shells off while they are submerged to ensure the delicate whites remain intact and smooth.
Tip: Peeling the eggs underwater helps the liquid slip under the membrane making the shell slide off effortlessly. - 4Marinate the eggs

Place the peeled soft-boiled eggs into a plastic zip-top bag. Pour the cooled soy sauce and mirin marinade over the eggs, ensuring they are well covered. Seal the bag tightly and let them marinate in the refrigerator overnight.
Tip: Squeezing out the excess air before sealing the bag ensures the eggs stay fully submerged in the marinade for an even color and flavor. - 5Slice and serve

After marinating overnight, the eggs will have a rich, savory exterior. Use a sharp kitchen knife to carefully slice each egg in half to reveal the gooey, jammy yolk inside. They are now ready to be served.
Tip: Wipe your knife with a damp cloth between slices to get the cleanest cuts through the soft yolk.