Jammy Eggs by the Dozen: The 6:30 Timer and the Ice Bath Maths
A jammy yolk — set at the edge, liquid in the middle — is the single most useful prep item on a brunch line. One batch of twelve covers toast, ramen, salads, devilled eggs and a bowl of rice across five days. The whole method is a timer, a pan width, and an ice bath that is cold enough to actually stop the cooking.
Ingredient card
| Item | Amount |
|---|---|
| Large eggs, straight from the fridge | 12 |
| Water, enough to cover by 3 cm | about 3 litres |
| Ice | 2 trays, about 500 g |
| Fine salt for the water | 1 tbsp |
| Baking soda, optional, for peeling | 1/2 tsp |
Scaling
for 2: Two eggs in a small pan, 6 minutes exactly. Same method, no adjustment.
for 4: Six eggs in a 20 cm pan, add 20 seconds to the timer because the water takes longer to come back up.
for 8: Twelve eggs in a 24 cm pan. Add 45 seconds. Do not go above twelve in one pan — the eggs cushion each other and the ones at the bottom overcook.
Time budget and burner map
Make ahead
- Peel under cold running water starting from the fat end, where the air pocket is. Peeling under water lets the shell fragments float away instead of sticking back to the white.
- Store peeled eggs in a lidded jar covered with cold water plus a pinch of salt. Change the water every second day. They hold five days.
- Leave them whole. A cut jammy egg starts to dry at the exposed yolk within about two hours.
To the pass
- Halve lengthways with a wet knife — a dry knife drags the yolk and leaves a smear.
- Yolk side up so the colour reads before anything else on the plate.
- Salt last, and only on the yolk. Salt on the white draws water out and makes it slick.
Where it goes wrong
- Counting the timer from the moment the eggs go in but the water having dropped off the boil. Twelve cold eggs can knock 20 °C off the pot. Keep the heat high until it is rolling again, then start the timer.
- A weak ice bath. Ice in a bowl of tap water is fine; ice in a bowl that is mostly water is not. The bath should be more ice than water, otherwise the eggs keep cooking and your 6:30 becomes a 9-minute egg.
- Peeling hot. The shell comes away in shreds and takes white with it. Four minutes in ice, then peel.
The method, in full
Why 6:30 and not 7:00
At 6 minutes a fridge-cold large egg gives a yolk that is barely set at the very edge and fully liquid in the middle — too loose to slice cleanly. At 7 minutes the yolk is set about a third of the way in, which many people prefer but which does not hold its shape on a piece of toast. Six and a half minutes, from a rolling boil and with the heat kept high, gives roughly a 2 mm set ring and a centre that is thick but still flows.
Altitude and egg size move this. At 1,500 m water boils at about 95 °C and you need to add 45 to 60 seconds. A medium egg takes 30 seconds less than a large.
The peeling problem, solved three ways
Fresh eggs are hard to peel because the white's pH is low and it bonds to the inner membrane. Three fixes, in order of how well they work. First: buy eggs a week ahead — at seven to ten days old the membrane releases almost on its own. Second: add half a teaspoon of baking soda to the boiling water, which raises the pH of the white at the surface. Third: shock them hard and peel under running water.
The baking soda trick has a threshold. More than a teaspoon in three litres and the water tastes soapy and can carry into the white through a cracked shell. If an egg cracks during boiling, pull it — it will be rubbery and it clouds the water.
Using twelve eggs across five days
Day one and two: halved on toast with flaky salt, or in a rice bowl. Day three: sliced into a salad — the yolk thickens the dressing as you toss it, so hold back half the oil. Day four: devilled, using the yolks mashed with 2 tablespoons of mayonnaise, 1 teaspoon of Dijon and a squeeze of lemon per six eggs. Day five: chopped into a warm potato salad or a bowl of ramen.
Past day five the white starts to take on a rubbery texture even though it is still safe. At that point chop them fine and fold into a filling rather than serving them whole.
Kitchen questions
Can I steam instead of boil?
Yes, and it peels more reliably. Steam for 7 minutes in a covered pot with 2 cm of water, then ice bath. The shells come off in two or three big pieces rather than a hundred flakes.
Why do my yolks end up off-centre?
Eggs stored on their side for days let the yolk drift. Store them pointed end down in the carton and the yolk sits centred, which matters if you are halving them for a plate.
How long do peeled jammy eggs keep?
Five days in the fridge, submerged in water with a pinch of salt, in a sealed jar. Without the water they dry and the white goes translucent in about a day.
