Crumbs are small pieces or fragments of food that are often left behind after cutting or eating. They can come from various types of food, such as bread, cookies, or pastries. Crumbs are typically dry and can be found on surfaces like tables or plates. In cooking, crumbs can be used as a topping or coating for dishes. For example, bread crumbs are often used to add texture to casseroles or to coat proteins like chicken or fish. Crumbs can also be collected and used in recipes, reducing food waste and adding flavor to meals.