🍜 Jammy eggs at altitude
Custard in the center, not soup and not chalk — the doneness elevation throws off first
What “jammy” means here
Jammy is the middle setting on the calculator: the white is fully set, the yolk is thick and glossy, and it spreads slowly instead of pouring. That is the egg people want on ramen eggs, avocado toast, and a rice bowl. It is also the doneness sea-level advice most often misses at elevation, because “seven minutes” at 95°C is still a soft egg.
If you want it to run, use soft-boiled. If you want to mash it, use hard-boiled. Jammy is the band between those, and it is narrow. Open the boiling eggs at altitude calculator and set doneness to jammy rather than splitting the difference by eye.
High-altitude timing is most obvious here
Soft yolks still look like yolks when they are a bit under. Hard yolks at least finish if you overshoot. Jammy is the one that turns into “why is this still liquid?” when you copy a coastal blog. The calculator’s altitude factor (about 3% extra time per degree the boiling point sits below 100°C) is doing the work you would otherwise guess wrong.
A large egg, fridge-cold, hot-water start is the usual ramen case. At sea level that is on the order of seven minutes of boiling; at 1,600 m it is noticeably longer. Extra-large eggs, a pot with more than four eggs, and a cold-water start each add time on top. A few eggs fit a 3-quart saucepan with a lid ; leave that lid off once the water boils. The form on the homepage stacks those; this page is not a second chart. Set doneness to jammy on the boiling eggs at altitude calculator and use that result for ramen eggs.
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Hot-water start is worth it for jammy eggs. You want a known start, because the difference between jammy and soft is not a leisurely minute. Cold-water start is fine if you select it on the calculator so the heat-up is in the number.
Pan-side routine
- Open the boiling eggs at altitude calculator, set doneness to jammy, and fill in altitude, size, starting temperature, water start, and count.
- Lower the eggs in gently. For a hot start the water is already boiling. Keep a steady boil. A violent rolling boil knocks the eggs around and is not any hotter.
- When your timer ends, get them out. Jammy yolks set the rest of the way in hot water in less time than it takes to find a bowl.
Immediately put cooked eggs in a large mixing bowl of ice water to make them easy to peel. A few minutes in that ice bath also stops them from cooking further in the shell, which matters more after the extra time altitude already added.
Peel after they are cold enough to handle, before any marinade. For ramen eggs, the soy bath is not a substitute for hitting jammy in the pot. If the yolk is still runny after a peel-and-check, raise altitude accuracy first (detect it), then egg size, before you start adding random minutes.
Jammy vs the other two
Jammy is the meal-prep middle: sliceable enough for a bowl, rich enough that you would not want it in egg salad. Soft is breakfast. Hard is mash and packing. The three methods share the same pot science; the science page is the write-up of why the water is cooler. The only jammy recipe here is ramen eggs.
Frequently asked questions
How is jammy different from soft and hard?
Soft still runs. Hard is fully set so you can mash it. Jammy is the band between: the white is fully set, and the yolk is thick and glossy and spreads slowly. That is the yolk for ramen eggs. It is narrow, so set doneness to jammy on the boiling eggs at altitude calculator instead of splitting the difference by eye.
Why does a sea-level 7-minute egg fail at elevation?
Seven minutes is a sea-level habit for a large egg started in boiling water. At about 95°C that same clock is often still soft. The calculator’s altitude factor — about 3% extra time per degree the boil sits below 100°C — is the bump. This page is not a second minute chart.
Do I peel before the marinade?
Yes. When the timer ends, move the eggs to ice water right away, then peel and marinate. The soy bath seasons the white. It does not finish a yolk that never reached jammy in the pot.
Where do jammy eggs go after the pot?
Ramen eggs (ajitsuke tamago) are the recipe on this site for this doneness. If the yolk is fully set, you passed jammy — use hard-boiled eggs for deviled eggs or egg salad instead of forcing a marinade.