Hard boiled eggs with the shell on and kept in a sealed container will keep for 1 week in the fridge. To determine whether an egg is hard boiled or raw, spin it! If it spins round and round evenly, it is hard boiled. If it wobbles while spinning, it is a raw egg.
The main difference when comparing hard-boiled vs. soft-boiled eggs is how cooked the egg whites and yolks are. Hard-boiled eggs are firmer because the egg is fully cooked so that there's no runniness. Soft-boiled eggs are only partially-cooked, so they have a runny yolk and a less-firm exterior.
An egg that floats in boiling water can be an indication that it's not fresh.
Boil for 6 – 7 minutes over medium-high heat for perfect hard boiled eggs. Using a slotted spoon, transfer them to a large bowl of ice water and let them cool for a few minutes. Or you can place them under cool running water to stop the cooking.
If you boil an egg for five or 10 minutes, it becomes firm and cooked. If you boil it for hours, it becomes rubbery and overcooked.
While it's been said that means the eggs have gone bad and should be thrown out, a floating egg does not necessarily equal a bad egg. Eggs have an air cell that becomes larger as the egg ages and acts as a buoyancy aid. An egg can float in water when its air cell has enlarged sufficiently to keep it buoyant.
The trick to great hard boiled eggs is not over-cooking them, which can leave a grey ring around the yolk and make their texture a bit rubbery.
You might have heard that you should drop your eggs into room temperature or cold water and then bring the water to a boil. This is a myth. In our tests, bringing the water to a boil first and then lowering the eggs into the bath made for easy peeling and more accurate timing.
The American Heart Association recommends up to one egg a day for most people, fewer for people with high blood cholesterol, especially those with diabetes or who are at risk for heart failure, and up to two eggs a day for older people with normal cholesterol levels and who eat a healthy diet.
The float test works because air builds up inside the egg as it ages, increasing its buoyancy. However, an egg that floats may still be safe to eat, according to the United States Department of Agriculture (USDA).
Simply fill a bowl with cold tap water and place your eggs in it. If they sink to the bottom and lay flat on one side, they are fresh and good to eat. A bad egg will float because of the large air cell that forms at its base. Any floating eggs should be thrown out.
For one to four eggs, bring the water to a rolling boil, cover the pot, and turn the heat down to its lowest setting for 12-14 minutes. For five to eight eggs, cook for 15 to 18 minutes. For nine to one dozen eggs, cook for 20 minutes. After cooking, transfer the eggs to a bowl of ice water.
Cooking time for a soft-boiled egg is 3 to 4 minutes, and indeed many aficionados specify their desired doneness by referring to a "3-minute egg" or "4-minute egg." With the former, there may be a slight amount of unset white around the yolk, but with the latter, the white is fully set.
Bring the water to a boil over medium heat. Then, set the timer and boil the eggs for 10 minutes. Depending on how soft you like your yolks how long to boil eggs can vary from 5 minutes to 12 minutes. The less time in the hot water, the less cooked the eggs will be.
When you boil eggs, hydrogen sulphide - a toxic gas is released in the whites of the egg. This happens especially when you overboil the eggs. If you have noticed, overcooked eggs have a green coating on their yolk, which is a signal that you should not eat them.
Bring water to a boil over high heat. Let the water rapidly boil for 30 seconds, cover and remove from heat. Let sit 4-12 minutes. 4 minutes for jammy eggs or 12 minutes for fully hard boiled eggs and 8 or 10 minutes for somewhere in between.
Fill pot with water to completely cover the eggs at least 1 inch above eggs and turn heat to high. Bring water to a boil, takes approximately 15 minutes. As soon as eggs start to boil, let boil for 10-12 minutes (I do 11 minutes). Set timer to help.
There is no specific number of eggs that a person should eat as part of a healthy diet.