Should You Use Room-Temperature Eggs or Cold Eggs?

For recipes that require whipping, such as cakes, cookies, and creams, room-temperature eggs are preferred. For boiling and some pastry doughs, cold eggs can be easier to work with. The difference comes from how an egg’s fluidity and cooking behavior change with temperature: the same egg is more viscous when cold and becomes more fluid as it warms, which affects how quickly it blends into a mixture.

When are room-temperature eggs useful? In cake batter, eggs whipped with butter and sugar blend in more easily and hold air better when they are at room temperature. Cold eggs can firm up the butter and cause the mixture to curdle, which can make the baked cake denser and less risen than expected. That is why cake recipes generally recommend taking eggs out of the refrigerator at least half an hour before baking. If you are in a hurry, you can also place the eggs, still in their shells, in warm water for a few minutes to get a similar result. Room-temperature egg whites also whip faster and to a greater volume than cold whites in recipes such as meringue and mousse, where only the whites are whipped. The whipping time is shorter, the foam is more stable, and it is less likely to deflate in the oven. For recipes like mousse where the whites stay uncooked, use pasteurized eggs. The same rule applies to recipes that whip whole eggs, such as profiteroles and sponge cake.

When should you use cold eggs? If an egg is taken straight from the refrigerator and placed in boiling water, the sudden temperature difference increases the risk of the shell cracking. To avoid this, bring the egg to room temperature or put the cold egg in a pot with cold water and heat them together gradually. If you want a hard-boiled egg that is easy to peel, starting with an egg straight from the refrigerator is actually preferred. The sudden cold shock after boiling helps separate the shell from the membrane and reduces tearing of the white while peeling. In pastry-making, cold eggs may be preferred to slow the softening and spreading of rich doughs, such as some cookies and puff pastry, before baking. The colder the dough remains, the better it holds its shape. In the end, there is no single rule: use room-temperature eggs for whipping and aeration, and cold eggs for processes such as boiling that involve a temperature shock. Choose based on what the recipe requires.

Is there a quick way to bring an egg to room temperature? If you do not have half an hour to wait, place the egg, in its shell, in warm tap water for about five minutes. This is enough to bring it closer to room temperature from refrigerator temperature. Do not use hot or boiling water, because the sudden heat can start cooking the white inside the shell. This is a practical fix if you discover at the last minute, while preparing cake batter, that the eggs are cold. If you have several eggs, refresh the water every few minutes; otherwise, it will cool quickly and may not have the desired effect. The same approach works for butter, but soften butter at room temperature rather than placing it in warm water.