Knowra Boiled egg Boiled egg A boiled egg is an egg cooked in its shell in hot water until its white and yolk reach a chosen firmness. Its texture depends chiefly on heating time and temperature.
Protein denaturation : The unfolding of a protein's structure, often caused by heat, acidity, or chemical exposure. Hot water unfolds egg proteins, changing the white and yolk from fluid to set.
Hard-boiled egg : An egg cooked until both its white and yolk are firm. It is the fully set version of the boiled egg.
Egg : An animal reproductive structure containing an embryo or the nutrients that support its development. A boiled egg is a familiar prepared form of this food and biological structure.
Poached egg : An egg cooked without its shell in gently heated water. It uses water as the cooking medium but lacks the shell that defines boiling an egg.
Egg white : The mostly water-and-protein portion of an egg surrounding the yolk. Its proteins set at lower temperatures than many yolk proteins, shaping cooking time.
Soft-boiled egg : An egg cooked until its white is set while its yolk remains partly or mostly liquid. It illustrates how a short cooking interval preserves a fluid center.
Eggshell : The hard, porous outer covering of a bird's egg, composed mainly of calcium carbonate. It keeps the egg intact in water while allowing heat to pass inward.
Fried egg : An egg cooked in a pan, usually with fat, until some or all of its white and yolk set. Direct pan cooking creates different textures and browning from shell-in-water cooking.
Egg yolk : The nutrient-rich central portion of an egg, enclosed by the white and vitelline membrane. Its proteins and fats determine whether the center stays creamy, jammy, or firm.
Onsen tamago : A Japanese egg traditionally cooked slowly in hot spring water, producing a tender white and custard-like yolk. Its gentle, prolonged heating creates a texture unlike conventional boiled eggs.
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