Fresh eggs are also better for poaching because they have tighter whites so they poach neatly.
But how can you tell how fresh your egg is before you even crack it? Here’s a quick tip: Simply put the egg in a glass of water and watch how it floats:
Eggs start to degrade in quality the moment they are laid by chickens. This is because egg shells are porous and over time an egg will absorb air.
Therefore older eggs have more air inside than super-fresh eggs, and will be more buoyant when placed in a glass.
When fresh eggs really matters
It’s really important to use fresh eggs when a recipe is relying on whipped eggs for aeration or to make something rise. Here are some examples:
Cakes – not all cakes rely on whipped eggs, but the ones that do yield professional bakery style plush, light as air sponges, such as this Vanilla Cake, Blueberry Layer Cake and Vanilla Cupcakes. For these cakes, fresh eggs is best for maximum cake rise. 1 week old eggs are ok (cake rises marginally less). I do not recommend using eggs 2 weeks+;
What happens if you use old eggs
If you use older eggs, the cakes will not rise as well and pavlovas will be flatter than they should be. Generally, the cakes will still work as long as you get some volume from beating, they just won’t be as tall or light-as-air as they should be.
During the course of testing the Vanilla Cake recipe, which I made a LOT because it’s such an important master recipe, this was especially noticeable. Using older eggs (2+ weeks old), the cake was still fluffy (because that cake has so much room for error) but the height was 15 – 20% less than the cake made with fresh eggs.
When older eggs does NOT matter as much in baking
Of course, make sure it’s not past the expiry date…. then it’s no good in ANYTHING!!!
I know this isn’t an exciting new recipe post, but it’s a lessor known yet essential baking essential tip because it’s a hidden cause for cakes not rising as they should. File it away under useful to know! – Nagi x
Life of Dozer
Fan of eggs in any form! Scrambled, in this case. 🙂