When frying in egg covering the skillet will it cause upper surface of to cook?

Covering the skillet while frying an egg will help the upper surface of the egg cook. Here's why:

* Trapped heat and moisture: Covering the skillet creates a small, enclosed space where heat and moisture are trapped. This allows the top of the egg to cook more quickly and evenly.

* Steam cooking: The trapped moisture turns into steam, which acts as a gentle cooking method. This steam helps set the egg white and cook the yolk without overcooking it.

However, there are a few things to keep in mind:

* Type of egg: Some eggs have a thicker white than others, which may take longer to cook even with the lid on.

* Desired doneness: If you want a runny yolk, you might not want to cover the pan for too long.

* Monitoring: It's important to monitor the cooking process, as the egg can quickly overcook if left covered for too long.

To summarize: Covering the skillet can be helpful for cooking the top of the egg, but it's not the only way to achieve this. You can also cook the egg over low heat or use a spatula to gently fold the egg white over the yolk. Ultimately, the best method depends on your personal preference and desired level of doneness.