Marinated ramen eggs, often called ajitama or ajitsuke tamago, are soft-boiled eggs soaked in a savory-sweet Japanese-style mixture of soy sauce, mirin, and water. Their jammy yolks and seasoned whites make a simple bowl of ramen feel more complete, and the marinade is easy to adjust to your taste.
Ingredients
- 4 large eggs, cold from the refrigerator
- ½ cup (120 ml) water
- ¼ cup (60 ml) Japanese soy sauce
- ¼ cup (60 ml) mirin
- 2 tablespoons (30 ml) sake, or additional water
- 1 tablespoon (12 g) granulated sugar
Instructions
- Make the marinade. Combine the water, soy sauce, mirin, sake, and sugar in a small saucepan. Warm over medium heat, stirring just until the sugar dissolves, about 2 minutes. Do not boil it. Remove the pan from the heat and let the mixture cool completely, about 10 minutes. A warm marinade can continue cooking the eggs and make them firmer than intended.
- Prepare an ice bath. Fill a bowl with cold water and plenty of ice. Set it near the stove before cooking the eggs so you can transfer them promptly.
- Boil the eggs. Bring a medium saucepan of water to a gentle boil, using enough water to cover the eggs by about 1 inch (2.5 cm). Lower the cold eggs into the water with a slotted spoon. Keep the water at a steady, gentle boil and cook for 7 minutes for set whites and soft, jammy yolks. For whole boiled eggs, cook until the yolk and white are firm if you prefer a fully set egg; a thermometer is not needed for whole boiled eggs.
- Cool and peel. Transfer the eggs straight into the ice bath and chill for 5 minutes. Tap each egg gently all over, then peel under a thin stream of cool water, starting at the wider end where the air pocket is. Handle them carefully because soft-boiled eggs are delicate.
- Marinate. Put the peeled eggs in a clean, close-fitting container or a food-safe zip-top bag. Pour in the cooled marinade, turning the eggs or repositioning the bag so the liquid touches as much of each egg as possible. Cover and refrigerate for at least 8 hours and up to 24 hours. Turn the eggs once or twice if they are not fully submerged.
- Serve. Lift the eggs from the marinade and let excess liquid drip off. Cut them in half lengthwise with a sharp knife, wiping the blade between cuts for neat halves. Serve cold or gently warmed as a ramen topping.
Tips
- Choose the texture you want. Seven minutes gives a soft center, but stove strength, egg size, and how cold the eggs are can shift the result. For firmer yolks, add 1–2 minutes; for the most consistent timing, use large eggs straight from the refrigerator.
- Peel with patience. Cooling quickly helps separate the shell from the egg. Crack the shell all over and peel gently; very fresh eggs can be harder to peel, so slightly older eggs may work better.
- Use a quick substitute for mirin. If you do not have mirin, use 3 tablespoons (45 ml) water plus 1 tablespoon (15 ml) sugar in its place. The flavor will be less aromatic and slightly less rounded. For a nonalcoholic marinade, replace the sake with water; the taste will be a little less complex.
- Keep the marinade cool and the eggs covered. Do not pour warm liquid over the eggs or leave them at room temperature to soak. A small container helps use less marinade while keeping the eggs evenly seasoned.
Serving Suggestions
Halve an egg and place it cut-side up on ramen just before serving, so the yolk stays visible and the broth does not wash away its seasoning. These eggs also pair well with udon, rice bowls, donburi, noodle salads, or a bowl of steamed rice with sliced scallions. For a quick snack, serve a whole egg with a pinch of toasted sesame seeds or a little chili oil.
The eggs are already salty from the soak, so taste the broth or other toppings before adding extra soy sauce. If you want to warm an egg for a hot bowl, let it sit briefly in hot broth after the noodles are ready rather than boiling it again, which can overcook the yolk.
Variations
Less salty: Replace 2 tablespoons (30 ml) of the soy sauce with water. The eggs will taste gentler and may need the full 24 hours to take on noticeable seasoning.
More aromatic: Add one thin slice of fresh ginger or a small piece of kombu to the marinade while warming it. Remove the kombu before it boils, and discard the aromatics before soaking the eggs if you prefer a clear marinade.
Spicy: Add ½ teaspoon (1 g) red pepper flakes or a few drops of chili oil to the cooled marinade. A little goes a long way because the flavor concentrates as the eggs soak.
Gluten-free: Use certified gluten-free tamari instead of regular soy sauce. Check the labels on the mirin and sake as well, since ingredients and production methods vary.
Storage and Reheating
Keep the eggs refrigerated in a covered container, ideally with the marinade, and use them within 3–4 days. Refrigerate them within 2 hours of cooking; do not leave them soaking on the counter. For best texture, eat them within 24 hours of marinating, though they can remain in the marinade while refrigerated for up to 3 days. The seasoning will grow stronger over time.
These eggs are best served chilled or at room temperature briefly. If reheating, remove the shell if needed and warm the egg gently in hot soup; do not microwave a whole egg, which can burst. Leftovers that are reheated should reach 165°F (74°C), the USDA FSIS safe temperature for reheated leftovers, though this will firm the yolk. Do not freeze them, as the whites can become rubbery.
Frequently Asked Questions
Can I make ramen eggs the same day?
They need at least 8 hours in the refrigerator to develop a noticeable seasoned flavor, so prepare them the night before when possible. A shorter soak will still season the outside, but the flavor will be milder.
Can I reuse the marinade?
It is safest to discard marinade that has been in contact with raw or cooked eggs rather than reusing it for another batch. If you want extra sauce for serving, reserve a portion before adding the eggs and refrigerate it separately.
Why did my yolks turn solid?
The eggs may have cooked longer than 7 minutes, or they may have remained warm after boiling. Start the timer as soon as the eggs enter boiling water, then transfer them immediately to the ice bath. A hot marinade can also continue cooking them.
Do the eggs need to be fully submerged?
Full submersion gives the most even color and seasoning. If using a bag, press out excess air and turn it occasionally. In a container, rotate the eggs once or twice during the marinating period.
Can I use brown eggs or extra-large eggs?
Shell color does not affect cooking time. Extra-large eggs may need about 30–60 seconds longer for a similar yolk texture, so adjust based on your preferred center and make a note of the timing that works with your stove.
Are these eggs safe for everyone?
Soft-boiled eggs have runny or jammy yolks, which are not cooked until firm. People at higher risk from foodborne illness, including pregnant people, young children, older adults, and those with weakened immune systems, should choose eggs cooked until both the yolk and white are firm.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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