Hard-cooked eggs may be difficult to peel if they are very fresh. This is because an egg shrinks inside during storage, which pulls the inner membrane away from the inside of the shell. For this reason, a hard-cooked egg will peel more easily if it has been stored for 1 or 2 weeks before it is cooked.
See Also
How to Peel Hard-Boiled EggsPeel Farm-Fresh Hard-Boiled Eggs the Easy Way! — Sonrise FarmsEggstra careful: 10 foolproof ways to avoid cracking eggs while boilingSolved! Here’s Why Your Hard-Boiled Eggs Have Green Yolks | Food Science & Human NutritionAfter boiling the eggs, crack the shell all over by tapping gently, then hold under running water to make peeling easier. Eggs may also be harder to peel if they are not cooked long enough. Hard cooked eggs should be kept refrigerated and used within 1 week.
