How long does it take for American cheese to grow mold at room temp and dry?

American cheese, like most other cheeses, will start to mold at room temperature within a few days.

Here's a breakdown:

* Mold Growth: Mold spores are everywhere in the air. Once they land on a cheese surface, they can start to grow in as little as 2-3 days at room temperature.

* Drying: American cheese will also dry out at room temperature, becoming harder and less palatable. The drying process can take a few days to a week or more depending on humidity and temperature.

Important Note:

* Refrigeration is key: To prevent mold growth and drying, American cheese should always be stored in the refrigerator.

* Appearance: Mold on cheese can range in color from white to green, blue, and even black.

* Safety: While some molds are safe to eat, others can be harmful. It's best to discard any cheese with visible mold on it.

In conclusion: It's crucial to keep American cheese refrigerated to maintain its quality and prevent spoilage. If you find mold on your cheese, it's best to throw it away.