Overbaking occurs when food, particularly baked goods like cookies or cakes, is cooked for too long in the oven. This can lead to a dry texture, hard crust, and loss of flavor. The outer layers may become overly browned or even burnt, while the inside can become tough and unappetizing. To avoid overbaking, it's essential to monitor cooking times closely and perform tests, such as inserting a toothpick into the center of the cake or bread. If it comes out clean or with a few moist crumbs, the item is done. Adjusting oven temperature and using timers can also help prevent this issue.