ELI5: Explain Like I'm 5

Yolkless egg

An egg usually has two parts: the yolk and the white part. The yolk is the yellow part in the center of the egg, and the white is the clear part around it. But sometimes, things happen during the egg-making process that can cause an egg to have no yolk at all.

You see, when a hen lays an egg, she makes a yolk first, and then it travels down through a tube to be covered in egg white and a shell. But sometimes, the tube that the yolk travels through gets blocked or closed off for some reason. When this happens, the egg white can still be made and come out of the chicken, but the yolk can't. So you end up with an egg that looks and tastes like a regular egg, but without the yellow yolk in the middle.

It's not very common to find a yolkless egg because most of the time, a blockage in that yolk tube will cause the egg to not be able to come out at all. But if it does make it out, you can use it just like any other egg in recipes like scrambled eggs, omelets, and baking.