This is a technique guide for the perfect jammy egg — a soft boiled egg with a fully set white and a yolk that is soft, oozy and melting rather than runny or set. It requires one ingredient, one pan and a very specific timer: 6 minutes and 15 seconds. That is it. There is no guesswork, no cutting open to check, no disappointing grey yolks or unset whites. Just a perfectly jammy egg, every single time.

What Is a Jammy Egg?

A jammy egg is a soft boiled egg cooked to a very specific point — beyond the runny, translucent yolk of a classic soft boiled egg but well short of the fully set, slightly chalky yolk of a hard boiled one. The white is completely set and firm; the yolk is soft, slightly fudgy and oozy in a way that earns it the name jammy — it does not flow like a runny egg, but it yields and melts in a way that a hard boiled yolk never does.

The Method — Why 6 Minutes and 15 Seconds?

Six minutes and fifteen seconds sounds extraordinarily specific, and it is — deliberately so. Here is the reasoning behind it.

The target is a total cooking time of around 6 minutes and 30 seconds from the moment the egg enters the water. But cooking does not stop the moment you remove the egg from the heat — it continues in the residual heat of the egg itself, particularly in the yolk, which is insulated by the white and takes longer to cool down. This means that an egg cooked for exactly 6 minutes and 30 seconds in the water will be slightly overdone by the time it reaches your plate.

The 15-second reduction accounts for the transition time — the few seconds it takes to turn off the hob, carry the pan to the sink, drain the water and get the eggs into cold water. That transition is not instantaneous, and those extra seconds of cooking matter at this level of precision. Setting the timer for 6 minutes and 15 seconds means the eggs reach approximately 6 minutes and 30 seconds of total cooking time, which is the sweet spot for a perfect jammy yolk.

The cold water bath at the end is equally important — it stops the cooking immediately and prevents the yolk from continuing to set as the egg cools, which is what causes that unpleasant grey-green ring around a hard boiled yolk. It also contracts the egg slightly inside the shell, which makes peeling considerably easier.

Why Room Temperature Eggs Matter

When a cold egg straight from the fridge is lowered into boiling water, the outer layers of the white begin to cook immediately while the centre of the egg is still cold. This temperature differential means the white and yolk cook at different rates — the white can be fully set before the yolk has had time to reach the right temperature, or the yolk can overcook while the cook waits for the white to firm up. Either way, the timing becomes unreliable.

A room temperature egg starts the cooking process from a consistent baseline, which means the 6 minutes and 15 seconds timer gives a predictable, repeatable result every time. Remove eggs from the fridge 30 minutes before cooking.

My Top Tips for the Perfect Jammy Egg

• Always start with room temperature eggs. Remove them from the fridge 30 minutes before you plan to cook.
• Use a pan that is the right size for the number of eggs you are cooking. The eggs need to be fully submerged in the boiling water.
• Boil the water in a kettle first, then pour into the pan and bring back to a gentle boil on the hob.
• Lower the eggs in gently — do not drop them. A sudden impact with the bottom of the pan can crack the shell and allow the white to leak out. Use a spoon to lower each egg in carefully.
• The water should be at a gentle, steady boil — not a vigorous rolling boil. Too much turbulence in the water can knock the eggs against each other and crack them.
• Set the timer the moment the eggs hit the water, not when the water returns to the boil. The cooking starts the instant the eggs enter the hot water.
• Run cold water over the eggs until the pan feels cold to the touch, then leave them to sit for a couple of minutes. Do not rush this stage — you need the cooking to stop completely before the eggs come out of the water.
• Peel the eggs under water. This is an optional but genuinely useful tip — peeling under cold water makes the shells slip off more easily and cleanly, and helps wash away any small fragments of shell. Hold the egg submerged in the cold water in the pan and peel with both hands.
• Eat immediately or store in the fridge unpeeled. Peeled jammy eggs can be stored in the fridge in a bowl of cold water for up to two days — change the water daily. Unpeeled eggs keep in the fridge for up to five days.

Ways to Serve a Jammy Egg

The jammy egg is one of the most versatile things in the kitchen — it makes almost everything it touches more interesting. A few ideas:

• Halved over a bowl of ramen or noodle soup — the yolk oozes into the broth and enriches it beautifully. Try it in the Thai red curry meatball noodle soup for an exceptional combination
• Sliced over avocado toast with a pinch of chilli flakes (red pepper flakes) and a drizzle of extra virgin olive oil
• Halved into a grain salad or a simple green salad to add protein and richness
• Alongside the creamy kale salad with garlic parmesan dressing and maple tofu — the jammy yolk is an outstanding addition
• On top of the halloumi bean bake with harissa and green olives — crack it into the sauce before serving for an extra layer of richness
• Simply halved on buttered toast with flaked sea salt and black pepper — sometimes the simplest things are the best

Ingredients and Tools You'll Need

Essential Ingredients

• Large eggs, at room temperature – size matters here; this timing is calibrated for large eggs. Medium eggs will be slightly overdone at 6 minutes and 15 seconds; extra large eggs may need an extra 15–30 seconds. Use large eggs for the most reliable result

Essential Tools

• Saucepan — sized appropriately for the number of eggs you are cooking; the eggs must be fully submerged
• Kettle — for boiling the water quickly
• Timer — use your phone or a kitchen timer; do not try to estimate this by eye
• Spoon — for lowering the eggs gently into the water
• Bowl or pan of cold water — for stopping the cooking immediately

Frequently Asked Questions

What is a jammy egg?

A jammy egg is a soft boiled egg cooked to a specific point where the white is completely set and firm but the yolk is soft, slightly fudgy and oozy — not runny and not fully set. The yolk melts and yields when you cut into it in a way that earns it the name jammy. It is the most versatile and most satisfying way to eat a boiled egg.

How long do you boil an egg for a jammy yolk?

6 minutes and 15 seconds from the moment the egg enters gently boiling water, starting with a room temperature egg. This accounts for the transition time between turning off the heat and getting the egg into cold water, giving a total cooking time of approximately 6 minutes and 30 seconds — the sweet spot for a perfectly jammy yolk.

Why do you start with room temperature eggs?

Room temperature eggs cook from a consistent baseline, which makes the timing reliable and repeatable. Cold eggs from the fridge start cooking at a lower internal temperature, which means the white and yolk cook at different rates and the timing becomes unpredictable. Remove eggs from the fridge 30 minutes before cooking.

Why do you put the eggs in cold water afterwards?

The cold water bath stops the cooking immediately — without it, the residual heat in the egg continues to cook the yolk after it comes out of the pan, which can push it past the jammy stage into fully set territory. It also makes the eggs considerably easier to peel by contracting the egg slightly inside the shell.

Can I make jammy eggs in advance?

Yes — jammy eggs keep well in the fridge for up to two days peeled (stored in a bowl of cold water, changed daily) or up to five days unpeeled. They are an excellent meal prep ingredient — make a batch at the start of the week and add them to salads, noodle bowls and toast throughout.

Why does the timing say 6 minutes and 15 seconds rather than 6 minutes and 30 seconds?

Because cooking does not stop the moment the egg leaves the water. The transition time — turning off the hob, carrying the pan to the sink, draining and replacing with cold water — adds approximately 15 seconds of additional cooking. Setting the timer for 6 minutes and 15 seconds accounts for this transition, giving a true total cooking time of around 6 minutes and 30 seconds and a perfectly jammy result.

Does this timing work for any number of eggs?

Yes — the timing is the same whether you are cooking one egg or six, provided the pan is the right size and all the eggs are fully submerged. Make sure the water returns to a gentle boil quickly after the eggs go in — if you are cooking a large number of eggs, the water temperature may drop more significantly when they are added, so use a slightly larger pan with more water to compensate.