How to Boil Eggs
Quick steps (20 min)
You need: saucepan with lid, slotted spoon, large bowl for ice water, timer
To boil eggs, lower them straight from the fridge into already-boiling water, keep it at a gentle boil for 6 to 11 minutes depending on how firm you want the yolk, then plunge them into ice water. Starting hot gives precise timing and shells that slip off cleanly.
Boiled egg timing chart
Times are for large eggs (about 56–63 g in the shell) taken straight from the fridge and lowered into water that is already boiling. Time from the moment the eggs go in.
| Time | White | Yolk | Best for |
|---|---|---|---|
| 6 min | Just set | Runny and warm | Soft-boiled eggs with toast soldiers |
| 7 min | Fully set | Thick and saucy | Ramen, salads |
| 8 min | Firm | Jammy, set at the edges | Grain bowls, snacking |
| 9 min | Firm | Soft but holding its shape | Scotch-style eggs, Niçoise salad |
| 11 min | Firm | Fully set and pale yellow | Hard-boiled eggs, egg salad, devilled eggs |
Add about 1 minute for extra-large eggs and take off 1 minute for medium. Room-temperature eggs cook about 1 minute faster.
What happens inside the shell
Egg cooking is a race between two sets of proteins. The white sets from about 62 °C / 144 °F and turns fully firm near 80 °C / 176 °F. The yolk thickens from about 65 °C / 149 °F and turns crumbly past 70 °C / 158 °F.
Heat travels from the shell inward, so the white always cooks first. Timing simply decides how far that heat front has pushed into the yolk when you stop it. Because the egg keeps cooking for a minute or two after it leaves the pot, an ice bath matters as much as the timer.
Why the yolk turns green
Overcooked eggs release hydrogen sulfide from the white. That sulfur reacts with iron at the surface of the yolk to form iron sulfide, the grey-green ring and the eggy smell. It is harmless but tastes chalky. Stopping at about 11 minutes and chilling quickly prevents it.
Why some eggs won't peel
A freshly laid egg has a pH of around 7.6. Over a week or so, carbon dioxide escapes through the shell and the white climbs towards pH 9. At the lower pH, the white bonds tightly to the inner shell membrane, so it tears away in chunks.
Two things help: use eggs that are 7 to 10 days old, and start them in boiling water. The quick hit of heat sets the outer white before it can fuse to the membrane. Adding baking soda or vinegar to the water makes little real difference.
Steps
- Bring a pot of water to a full boil. Use enough to cover the eggs by about 2.5 cm (1 inch), so adding them doesn't drop the temperature too far.
- Lower fridge-cold eggs into the water with a spoon. Go gently so they don't crack against the bottom; cook in a single layer.
- Turn the heat down to a gentle boil and start the timer. A furious boil knocks eggs together and cracks shells. Use the chart above to pick your time.
- Fill a bowl with ice and water while the eggs cook. Aim for roughly half ice, half water.
- Move the eggs into the ice bath when the timer ends. Use a slotted spoon so you can transfer them all within a few seconds.
- Chill 2 minutes for warm eggs or 10 minutes to serve cold. A short chill stops the cooking while keeping soft-boiled eggs warm; a longer one makes peeling easier.
- Crack the shell all over and peel from the wide end. The air pocket at the wide end gives you an easy starting point. Peeling under a thin stream of water helps lift the membrane.
Common mistakes and fixes
- Cracked shells and leaking white. The water was boiling too hard or the eggs were dropped in. Lower them with a spoon and keep a gentle boil.
- Grey, chalky yolks. Overcooked. Cut back to 10–11 minutes and use an ice bath.
- Undercooked whites near the yolk on soft eggs. The eggs were extra-large or the pot was crowded. Add 30–60 seconds or use a bigger pot.
- Shells stuck fast. Eggs were very fresh or started in cold water. Use older eggs and a boiling start.
- Inconsistent results. Starting in cold water makes timing depend on your stove. A boiling start removes that variable.
High altitude
Water boils at lower temperatures as you go up, about 95 °C / 203 °F at 1,500 m (roughly 5,000 ft). Eggs cook more slowly, so add 1 to 2 minutes at moderate altitude and test one egg before cooking a batch.
Storage and safety
Refrigerate boiled eggs within 2 hours and eat them within about a week. Leave them in the shell for the best texture, or keep peeled eggs in a sealed container. Soft-boiled eggs are best eaten right away.
Questions
Should you start eggs in cold or boiling water?
Starting eggs in already-boiling water gives more predictable timing and easier peeling. The sudden heat sets the outer white quickly so it pulls away from the membrane instead of gluing to it.
Why is there a green ring around my hard-boiled egg yolk?
The green-grey ring is iron sulfide, formed when sulfur from the white reacts with iron in the yolk during overcooking. Keep hard-boiled eggs to about 11 minutes and chill them in ice water right away to prevent it.
Why are fresh eggs hard to peel?
Very fresh eggs have a lower pH, which makes the white bond tightly to the inner membrane. Eggs that are 7 to 10 days old peel more easily, and a boiling-water start helps any egg.
How long do hard-boiled eggs last in the fridge?
Refrigerate them within 2 hours of cooking and eat within about one week, peeled or unpeeled. Keep peeled eggs in a covered container so they don't dry out or absorb odours.
Can you steam eggs instead of boiling them?
Yes. Steam over 2 to 3 cm of boiling water in a covered pot using the same times as boiling. Steaming uses less water and comes back to temperature faster when you add the eggs.