What people use it for
- A chart is not a timer The articles print one column of minutes and a footnote about size. The footnote is the part that decides whether the yolk runs or crumbles.
- The whole scale, not one row Change the egg once and the tool prints the five yolks for that egg, so the next breakfast is a line you already have.
- The two things nobody counts Altitude and the fridge, which is where a chart written at sea level for a room temperature egg quietly stops being true.
Every chart on the internet is written for one egg
Search this and you get the same five or six numbers from every food site: five minutes, six minutes, eight, ten, twelve. They are all measured on a large hen egg at room temperature, lowered into water that is already boiling, in a kitchen near sea level. Change any of those and the number is wrong by a minute or two, which is the difference between a jammy yolk and a chalky one.
A jumbo egg straight out of the refrigerator, started in cold water in Denver, is four minutes away from the chart. That is not a small correction. It is the whole result.
What moves the minutes
| Yolk | Large egg, boiling start, room temperature | What it looks like |
|---|---|---|
| Runny | 6 minutes | Liquid yolk, white just set, for soldiers of toast |
| Soft set | 7 minutes | Yolk like warm custard, white firm |
| Jammy | 8 minutes | Sticky, deep orange, the one that does not smear |
| Hard boiled | 10 minutes | Fully set and still mashable, not dry at the edge |
| Fully firm | 12 minutes | Chalky centre, the one that slices clean for deviled eggs |
Size is worth a minute from small to jumbo, and the fridge is worth another one. A cold-water start, where the egg goes in with the tap water and the clock starts when it boils, runs about two minutes longer and is the method that peels the cleanest. Altitude is the one nobody expects: water boils at 202 F at 5,000 feet instead of 212 F, so above 3,000 feet the egg gains a minute for every extra 1,000.
The ice bath is part of the recipe
An egg keeps cooking after it leaves the water. The heat in the shell and in the outer white carries on into the yolk, and five minutes on the counter is enough to push a jammy yolk over to hard. That is where the grey-green ring comes from: sulphur from the white meeting iron in the yolk at temperature.
Two minutes in water with ice in it stops the process dead and makes the shell contract away from the membrane. A bowl of cold tap water is not the same thing on a warm day, so use actual ice.
Peeling is a separate problem
The fresher the egg, the harder it peels, because the membrane is still tight against the shell and the white is holding more carbon dioxide. An egg that has been in the fridge for a week or two peels better than one laid yesterday, which is the opposite of what most people expect.
Crack the shell all over on the counter before it cools, then peel it under running water or back in the ice bath, starting from the fat end where the air pocket is. A cold-water start plus a shock in ice water plus a cracked shell is the combination that gets the shell off in one or two pieces instead of thirty.