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How to cook hard-boiled eggs properly

How to cook hard-boiled eggs properly

A hard-boiled egg is properly cooked when: shell is not broken, white and yolk are firm, yolk is only yellow with no traces of green around it. Here are some tips to make this easy.

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Last modified on: November 4th 2013

For 4 eggs, you will need:

How long does it take?

PreparationRestingCookingStart to finish
8 min.1 hour 10 min.10 min.1 hour 28 min.
Preservation: A few days in the fridge, in a closed jar.
At what time?When will I finish if I start the recipe at a certain time?
When should I start for the recipe to be ready at a certain time?
Work this out...

Step by step recipe

1 How to cook hard-boiled eggs properly  : Photo of step #1First problem: how to prevent shell from breaking (as in this photo) and white spilling out into the water while cooking?

Egg shells break during cooking for two reasons:

1) Temperature difference, if they go straight from the fridge to boiling water, the shell always (or nearly always) breaks.

Solution: remove your eggs from the fridge at least one hour before cooking.

Note : Eggs don't need to be kept in the fridge.
1 hour
2 How to cook hard-boiled eggs properly  : Photo of step #22) Because in the bottom part of the egg, the broader end, there is an air pocket (in red on the diagram), and when cooking this air expands and eventually breaks the shell.

You will notice that the older the egg is, the bigger the air pocket, so the risk of the shell breaking is greater with an old egg than a fresh one.
3 How to cook hard-boiled eggs properly  : Photo of step #3Solution: You need to pierce the air pocket so that the air can escape during cooking.

To do this you can use big needle or a small nail (as in the photo), push in it a few millimetres.
1 min.
4 How to cook hard-boiled eggs properly  : Photo of step #4The aim is to just pierce the air pocket and to make a very small hole.
5 How to cook hard-boiled eggs properly  : Photo of step #5Boil a pan of water, and lower in your pierced eggs gently, using a tablespoon.

Leave to cook 10 minutes, no more.
10 min.
6 How to cook hard-boiled eggs properly  : Photo of step #6If eggs cook longer, yolks will became yellow-green (as in this photo), and develop a sulphurous taste and smell, and white will become rubbery.
7 How to cook hard-boiled eggs properly  : Photo of step #7To demonstrate the effect of piercing: on left a pierced egg (shell intact), on right an un-pierced egg (shell broken).
8 How to cook hard-boiled eggs properly  : Photo of step #8Cool eggs immediately by putting them into cold water. 10 min.
9 How to cook hard-boiled eggs properly  : Photo of step #9To remove the shell, tap the bottom of the egg on your work surface to break it.
10 How to cook hard-boiled eggs properly  : Photo of step #10Do the same with the top of the egg.
11 How to cook hard-boiled eggs properly  : Photo of step #11Roll the egg round with your hand to break all the shell.
12 How to cook hard-boiled eggs properly  : Photo of step #12Then remove the shell, as if peeling the egg. 5 min.
13 How to cook hard-boiled eggs properly  : Photo of step #13Wash the egg to remove any small pieces of shell, and leave in cold water, or covered in the fridge, until using. 2 min.
14 How to cook hard-boiled eggs properly  : Photo of step #14Another way to cook, probably priceless: Fill the pan with cold water to submerge the eggs (drilled) and bring to boil.

When boiling is reached, cover, remove from heat and let stay for 10 minutes.

Remarks

Gaston Lenôtre, in his books, say that boiling water for eggs should be salted and vinegared. Probably because egg shells are porous, and so that salted water can salt the egg when cooking?

I've tried it, but I don't taste a real difference. What about you?

Nutritional information

Whole recipe
CaloriesProteins CarbohydratesFats
38431 gr0 gr29 gr
19 %12 %0 %4 %
Per 100 g
CaloriesProteins CarbohydratesFats
16013 gr0 gr12 gr
8 %5 %0 %2 %
% are calculated relative to a Recommended Dietary Intake or RDI of 2000 k-calories by day for a woman (change to a man).

How much will it cost?

For 4 eggs : 0.70 €
Per eggs : 0.18 €

Note : These prices are only approximate.

Change currency:

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Source: Home made.
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