A proper ramen egg has a white that is just set and holds its shape, a yolk that is still liquid gold in the middle, and a shell of savoury-sweet soy flavour that has soaked about two millimetres into the white. Split one in half and it should sit there looking almost too good to eat. They are not difficult, but they are unforgiving on timing, and that is really the whole recipe.
These taste salty, faintly sweet and deeply savoury against the mild richness of the yolk. Difficulty is low once you own a timer, but you do need patience: 8 minutes of cooking and a minimum of 4 hours marinating, ideally overnight. Make six at a time and you will have the best fridge snack in the house as well as a topping for every bowl in our ramen collection.
Why This Recipe Works
- Six minutes and thirty seconds is the number. For a large fridge-cold egg lowered into already-boiling water, 6 minutes 30 seconds gives a fully set white and a properly runny yolk. Every extra 30 seconds moves the yolk one stage firmer.
- Boiling water, not cold-start. Lowering eggs into water already at a rolling boil makes the timing repeatable, because the clock starts at a known temperature. Cold-start timings drift with pan size and hob power.
- The ice bath stops the cooking dead. Residual heat will keep cooking the yolk for several minutes otherwise. Two minutes in properly iced water is the difference between runny and fudgy.
- The marinade is diluted with water. Neat soy sauce would make the outer white salty and rubbery within an hour. Cutting it with water and mirin lets you marinate overnight without ruining the texture.
- A bag, not a bowl. Peeled eggs float. Marinating them in a sealed bag with the air pressed out keeps every surface in contact with the liquid, so they colour evenly without needing turning.
- Cracking the wide end first makes peeling easy. The air pocket sits there, so starting your peel at that end gets you under the membrane cleanly instead of tearing into the white.
Ingredient Notes
Eggs. Large free-range eggs, straight from the fridge. Cold eggs are essential because the timings here assume it. Eggs that are a few days old peel more easily than very fresh ones, which is one of the rare cases where older is better.
Light soy sauce. The main savoury element. Do not use dark soy sauce, which is thicker, sweeter in a molasses way and will colour the eggs almost black.
Mirin. Provides the gentle sweetness that stops the eggs tasting purely of salt. If you cannot get it, use 1 tablespoon of caster sugar dissolved in 2 tablespoons of warm water.
Sake. Optional. It adds a clean depth. Replace with water if you would rather not use it.
Water. Not an afterthought. The ratio of roughly one part soy to one part water is what makes overnight marinating possible.
Optional aromatics. A bruised garlic clove, a slice of ginger, or a small piece of kombu in the marinade all add background depth. Keep them subtle; the egg should still taste like an egg.
Substitutions and Variations
Firmer yolk. Cook for 7 minutes 30 seconds for a jammy, fudgy centre that will not run, which is easier to handle if the eggs are going in a packed lunch or on top of a rice bowl.
Hard-set. Nine minutes gives a fully cooked yolk. Still delicious marinated, and the best option if you are serving them to anyone who should avoid runny eggs.
Spicy eggs. Add a teaspoon of chilli oil or a few dried chilli flakes to the marinade. The heat is gentle and sits behind the soy.
Tea-smoked look. Add a used black tea bag to the marinade for a darker, slightly tannic result.
Sweeter, Chinese-style. Increase the mirin to 5 tablespoons and add a star anise. The eggs move away from ramen and towards braised soy eggs, which are very good with rice.
Reduce the salt. If you find them too savoury, increase the water by 50 ml. Marinating time stays the same.
Because these are eggs, they are not suitable for a vegan diet. We have not tested any other dietary variation, so we cannot describe these as suitable for any specific diet.
Step-by-Step Guidance
The card below has the exact method. These are the four things that decide whether your eggs look like the ones in the picture.
Set up before you start
Have the ice bath made and sitting next to the hob before the eggs go in the water, and have a timer ready. Ten seconds of hunting for a bowl at the end costs you a runny yolk. The bath needs actual ice, not just cold tap water.
Lowering and stirring
Lower the eggs in gently on a slotted spoon so they do not crack against the base. Then stir the water slowly for the first 60 seconds. This keeps the yolk centred, so when you halve the egg the yolk sits in the middle rather than off to one side. Keep the water at a gentle rolling boil, not a violent one, or the eggs will knock together and crack.
Peeling
After 2 minutes in the ice bath, tap the wide end of each egg firmly on the worktop to crack it, then roll the egg gently under your palm to craze the shell all over. Start peeling at the wide end, getting your thumb under the membrane rather than just the shell. Doing this under a trickle of cold running water helps the membrane lift away. Take your time — a torn white will not look right no matter how good the marinade is.
Marinating
Mix the marinade in a bowl until the sugar in the mirin has dissolved, then pour it into a small food bag with the peeled eggs. Press the air out, seal, and lay the bag flat in a container in the fridge so the eggs are surrounded. Four hours gives a light seasoning and a pale ring; overnight, up to about 12 hours, gives the proper deep amber band. Beyond 24 hours the whites start to firm up and get noticeably salty.
Professional Tips
- Use a timer, not judgement. This is the one recipe where 20 seconds genuinely changes the result. Set a timer with an alarm.
- Cook one test egg first. Hob power, pan size and egg size all vary. Sacrifice one egg to find your exact number, then use it forever.
- Do not skip stirring. Centred yolks are the visual signature of a good ramen egg and cost you one minute of gentle stirring.
- Halve them with a wet knife. Dip the blade in hot water and wipe it between cuts. A dry blade drags the yolk across the cut face.
- Halve them at the last moment. A cut ramen egg starts weeping and drying almost immediately. Keep them whole in the marinade and cut as you plate.
- Serve them at room temperature. A fridge-cold egg dropped into hot broth cools the bowl and the yolk stays stiff. Take them out 15 minutes before serving.
- Reuse the marinade once. It will do a second batch. After that it becomes diluted by the eggs and loses its punch.
Troubleshooting
| Problem | Likely cause | Solution | Prevention |
|---|---|---|---|
| Yolk fully set when you wanted runny | Overcooked, or ice bath not cold enough | Enjoy them as jammy eggs and reduce the time next batch | 6 minutes 30 seconds exactly, then 2 minutes in genuinely iced water |
| White too soft, egg collapses when peeled | Undercooked | None; the egg cannot be re-cooked once peeled | Do not go below 6 minutes for a large egg |
| Shell will not come away cleanly | Very fresh eggs, or peeling started at the narrow end | Peel under cold running water and work slowly | Use eggs a few days old and always start at the wide end |
| Eggs cracked during cooking | Dropped in, or water boiling too violently | They are still edible, just less tidy | Lower them in on a slotted spoon and keep a gentle rolling boil |
| Yolk off to one side | Not stirred during the first minute | Cosmetic only | Stir slowly for the first 60 seconds |
| Whites rubbery and very salty | Marinated too long, or marinade not diluted | Rinse briefly and serve; the texture will not recover | Dilute the soy with water and marinate 4 to 12 hours, 24 at the very most |
| Pale and patchy colour | Eggs floated above the marinade | Turn them and give them another few hours | Marinate in a sealed bag with the air pressed out, laid flat |
Serving Suggestions
The obvious home is on top of a ramen bowl. Halve one and float it on our simple chicken ramen alongside the fried egg for a proper double-egg bowl, or use it in the cozy miso chicken ramen and the chilli oil beef ramen where the sweetness of the marinade offsets the heat particularly well.
Away from ramen, they are excellent halved over rice, tucked into a bao bun, or just eaten whole out of the fridge with a little sesame salt. Serve alongside Naga chilli potatoes and a cold drink and you have a very good snack plate. More technique pieces live in kitchen tips.
Storage and Reheating
- In the marinade. Keep the eggs whole in their bag or a sealed container in the fridge. After the first 12 hours, lift them out of the liquid and store them in a dry sealed container instead, otherwise they keep getting saltier and firmer.
- Once cut. Eat straight away. A halved ramen egg dries out and the yolk skins over within minutes.
- Do not reheat. Warming a soft-yolked egg will cook the yolk through and defeat the point. Bring them to room temperature instead, or let the hot broth warm them in the bowl.
- Do not freeze. Freezing turns the white tough and unpleasantly rubbery.
- The marinade. Strain and refrigerate it in a sealed jar and it will do one more batch.
These are soft-cooked eggs with a runny yolk. UK Food Standards Agency advice is that eggs with the British Lion mark can be eaten raw or lightly cooked by everyone, including vulnerable groups, but non-Lion and imported eggs should be cooked through. Store them refrigerated and follow the standard guidance on cooling within two hours. We have not carried out shelf-life testing on this recipe, so please use your own judgement.
Frequently Asked Questions
How long do ramen eggs need to marinate?
Four hours is the minimum for any real flavour, and overnight is where they are at their best. Somewhere between 8 and 12 hours gives the classic deep amber band without the white going firm.
Can I marinate them for two days?
You can, but they will be noticeably saltier and the whites will have tightened. If you want to make them well ahead, marinate overnight then transfer the eggs out of the liquid into a dry container.
Why do people call them ajitsuke tamago?
That is the Japanese name, meaning seasoned egg. You will also see them written as ajitama. They are the same thing.
My yolks keep coming out fudgy rather than runny. What am I doing wrong?
Almost always the ice bath. Cold tap water is not cold enough to arrest the cooking, so the yolk keeps setting from residual heat. Use real ice and give it a full two minutes.
Can I use medium eggs?
Yes, but reduce the time to 6 minutes. For very large eggs, go to 7 minutes.
Do I need to prick the eggs before boiling?
No. Lowering them in gently on a slotted spoon and keeping the boil gentle does more to prevent cracking than pricking does.
Can I make these without soy sauce?
Not really — the soy is the entire point of the flavour. You could season them simply with salt water and a little mirin, but that is a different and much milder egg.
PrintSoy Marinated Ramen Eggs (Ajitsuke Tamago)
- Total Time8 hours 17 minutes
- Yield6 eggs 1x
Soft-boiled eggs with fully set whites and properly runny yolks, marinated overnight in a diluted soy, mirin and sake mixture. The classic ramen topping, and the best thing in your fridge.
Ingredients
For the eggs
- 6 large free-range eggs, fridge-cold
- Plenty of ice, for the ice bath
For the marinade
- 120 ml light soy sauce
- 120 ml cold water
- 3 tbsp mirin
- 1 tbsp sake (optional, or use water)
- 1 garlic clove, bruised (optional)
- 1 slice fresh ginger (optional)
Instructions
- Fill a large bowl with cold water and plenty of ice and set it next to the hob. Have a timer ready before you start.
- Bring a saucepan of water to a gentle rolling boil. There should be enough water to cover the eggs by 3 cm.
- Lower the fridge-cold eggs in gently using a slotted spoon, one at a time, so they do not crack against the base. Start the timer for 6 minutes 30 seconds.
- Stir the water slowly for the first 60 seconds to keep the yolks centred, then leave the eggs to cook at a gentle rolling boil.
- The moment the timer goes, lift the eggs straight into the ice bath. Leave them for 2 full minutes.
- Meanwhile, mix the soy sauce, water, mirin and sake in a bowl, stirring until combined. Add the garlic and ginger if using.
- Tap the wide end of each egg firmly on the worktop, then roll it gently under your palm to craze the shell all over. Peel from the wide end, working under a trickle of cold running water and getting your thumb under the membrane. Take your time.
- Put the peeled eggs into a small food bag and pour in the marinade. Press out as much air as you can and seal the bag.
- Lay the bag flat in a container and refrigerate for at least 4 hours, or ideally 8 to 12 hours overnight.
- Lift the eggs out of the marinade. Bring to room temperature for 15 minutes before serving. Halve with a knife dipped in hot water, wiping the blade between cuts, and serve immediately.
Notes
Timing guide: These times are for large fridge-cold eggs lowered into already-boiling water. 6 minutes 30 seconds gives a set white and a runny yolk. 7 minutes 30 seconds gives a jammy, fudgy yolk. 9 minutes gives a fully cooked yolk. Use 6 minutes for medium eggs and 7 minutes for very large ones. Cook one test egg first to calibrate your own hob.
Make ahead: Marinate overnight, then transfer the eggs out of the liquid into a dry sealed container in the fridge, otherwise they keep getting saltier and the whites firm up. Do not cut them until you are ready to serve.
The mistake to avoid: Using cold tap water instead of a proper ice bath. Residual heat will keep cooking the yolk for several minutes and you will get fudgy eggs every time. Use real ice and give it two full minutes.
Variations: Add a teaspoon of chilli oil or dried chilli flakes to the marinade for gentle heat. Increase the mirin to 5 tbsp and add a star anise for a sweeter, Chinese-style soy egg. Add 50 ml extra water if you find them too salty.
Reuse: The strained marinade will do one more batch of eggs. After that it is too diluted.
Equipment: A saucepan, a slotted spoon, a large bowl for the ice bath, a timer and a small resealable food bag.
Food safety: These are soft-cooked eggs with a runny yolk. UK Food Standards Agency advice is that British Lion marked eggs may be eaten raw or lightly cooked by everyone including vulnerable groups, while non-Lion and imported eggs should be cooked through.
Allergen note: Always check the label of every ingredient you use, as recipes and allergen information can change. People with food allergies or intolerances must also consider cross-contamination.
Take particular care with the eggs themselves, soy sauce (soya, wheat), and mirin and sake (sulphites in some brands). Allergen information must be confirmed by The Cozy Bowl before it is relied upon.
This is a home recipe inspired by a dish or flavour available at The Cozy Bowl. It is not the restaurant’s exact commercial recipe.
- Prep Time: 10 minutes
- Marinating time: 8 hours
- Cook Time: 7 minutes
- Category: Basics
- Method: Stovetop
- Cuisine: Japanese-inspired
One Small Job, Every Bowl Improved
Six eggs, ten minutes of work and one night in the fridge, and every bowl of noodles you make for the next few days gets better. If you would rather have someone else worry about the timing, add a fried egg or two to any ramen when you order from The Cozy Bowl, or come and see us on Biscot Road in Luton.