Both work. Boiling-water start is more precise, because cooking begins at a moment you can see. Cold-water start is gentler on shells. The rule people get backwards: with a cold start you cook for less time from the boil, not more — roughly 2 minutes 30 seconds less — because the egg has been cooking on the way up.
The two methods
Boiling-water start. Bring the water to a full rolling boil first, lower the eggs in on a spoon, and start timing immediately. This is the reference method for every time on this site, and the one the timing chart is built from.
Cold-water start. Put the eggs in the pan, cover with cold water, and bring the whole thing up to a boil together. Start timing when the water reaches a full rolling boil — not when you turn on the heat.
Why boiling start is more precise
Because it removes a variable you can’t measure. With a cold start, the eggs are cooking throughout the climb to boiling — gently at first, then faster — and how long that climb takes depends on your pot, your burner, how much water you used, and how many eggs are in it. Two people following identical cold-start instructions can get meaningfully different eggs.
A boiling-water start has none of that. The egg goes from cold into 212°F water at a moment you can identify precisely, and it stays at 212°F until you take it out. That’s why it’s the reference: it’s the version that reproduces.
This matters most at the soft end. A soft boiled egg‘s doneness window is barely two minutes wide, and thirty seconds is visible in the yolk. For hard boiled eggs, where the window is far more forgiving, either method is fine.
Why cold start is gentler
Two reasons, both about shock. A cold egg dropped into boiling water expands rapidly and unevenly, and the air pocket inside expands with it — that pressure differential is a common cause of cracked shells. A cold start warms everything together, so nothing gets shocked.
The eggs also aren’t being lowered into turbulent water, so there’s less knocking about. If cracking is your recurring problem, this is the first thing to try.
Cold start times
| Doneness | Boiling start | Cold start, from the boil |
|---|---|---|
| Very soft | 5:00 | 2:30 |
| Soft | 6:00 | 3:30 |
| Jammy | 6:45 | 4:15 |
| Medium | 8:00 | 5:30 |
| Hard | 11:00 | 8:30 |
The timer has a cold-water-start setting that applies this automatically, along with your egg size and altitude. Switch it on and the number adjusts itself.
The mistake almost everyone makes
Adding time to a cold start instead of subtracting it.
The intuition is reasonable — a cold start takes longer overall, so surely the eggs need longer? But the overall time and the timed portion are different things. By the moment the water boils, your eggs have already spent five to eight minutes in water climbing from cold to 212°F, and a meaningful amount of cooking has happened in that window. If you then start a full eleven-minute hard-boil timer, you’ll overshoot by minutes and get chalky yolks with a grey ring.
Count from the boil, and count less. That’s the whole rule.
Which should you use?
| If you want… | Use |
|---|---|
| A precise runny or jammy yolk | Boiling start |
| Repeatable results week to week | Boiling start |
| Fewer cracked shells | Cold start |
| Easier peeling | Boiling start |
| Hard boiled eggs, and you’re not fussy | Either |
| Not to think about it | Boiling start — one fewer judgement call |
There’s a third option worth knowing if cracked shells drove you here: steaming gets you the gentleness of a cold start with the precision of a boiling one, and the eggs peel better as a bonus.
Cold start questions
Should you boil eggs in cold or boiling water?
Boiling water gives more repeatable results, because cooking starts at a visible moment rather than somewhere during the climb to a boil. A cold-water start is gentler on shells and worth using if your eggs crack. For a precise soft or jammy yolk, use boiling water.
How long do you boil eggs from a cold start?
Timed from the moment the water reaches a full rolling boil: about 3:30 for soft, 4:15 for jammy, 5:30 for medium and 8:30 for hard boiled large eggs. That’s roughly two and a half minutes less than the boiling-start times, because the eggs cook while the water heats.
Do you add or subtract time for a cold water start?
Subtract — this is the point almost everyone gets backwards. The eggs have already been cooking during the climb to boiling, so counting a full boiling-start time from the boil overshoots by minutes and gives chalky yolks with a grey ring.
Does a cold water start make eggs easier to peel?
No, the opposite — a boiling-water start generally peels better, because the rapid initial heat helps separate the shell membrane from the white. A cold start’s advantage is fewer cracked shells, not easier peeling. For the easiest peel, steaming or a pressure cooker beat both.
When do you start timing with a cold water start?
When the water reaches a full rolling boil — large, constant bubbles — not when you turn on the heat. Timing from the burner going on introduces every variable of your pot, hob and water volume, which is exactly what makes cold-start timing unreliable.
Let the timer do the subtraction
Switch on cold-water start and it adjusts the count for you — alongside your egg size and altitude.