How to Hard Boil Eggs
What you will need
Eggs(Nutritional facts 331 calories, 29.32 g fat, 0.32 g carbohydrates, 16.68 g protein, 1144 mg cholesterol, 73 mg sodium)
How to cook
You might not want to hear it, but there's no sure-fire route to a perfect boiled egg.
Somewhere between 8 and 12 minutes in gently boiling water should work. A full boil is not advisable as it increases the likelihood that your eggs will crack as they cook.
The point of boiling eggs is to bring them gently to the perfect internal temperature that yields a fluffy yolk and a firm, but tender white. But there are a lot of variables to manage.
At high altitude, water boils at lower temperatures. So of course, at a lower temperature, it will take a little longer to boil an egg.
If your eggs are at room temperature, they will cook more quickly and evenly because they are already at a higher temperature to begin with. And if your eggs have been hiding in the back of the fridge where the cold air comes in, they might be much colder and so take extra time to cook. Also, if you cook too many eggs at once, it will drop the water temperature dramatically and again, cooking will take even longer.
Another problem is peeling. Shocking boiled eggs in ice water as soon as they're done cooking can sometimes make them easier to peel. Also, older eggs will peel more easily. And, some cooks swear that steaming, as opposed to boiling, will also make peeling easier. Steaming will take about 5-8 minutes longer than boiling.
Sometimes there's just nothing you can do. I've boiled thousands of eggs and tried every trick I've encountered. None of those tricks guarantee a perfect, easy to peel hard boiled egg without fail.
It will take a little trial and error to find the cooking time that works for you. In fact, your perfect egg and mine may not even look the same.