Croutons are small, crispy cubes of bread that are often used as a topping for salads and soups. They are typically made from day-old bread that has been seasoned with herbs, spices, and sometimes cheese, and then baked or fried until crispy. Croutons come in a variety of flavors, including garlic, cheese, and herb, and can be made from a variety of breads, including white, whole wheat, and sourdough. They are a popular addition to Caesar salad, but can also be used to add texture and flavor to other salads, as well as to soups and stews.