Hot and Sour Soup is a popular Chinese soup that is both spicy and tangy. It is made with a variety of ingredients, including mushrooms, tofu, bamboo shoots, and eggs. The soup gets its spiciness from white pepper and its tanginess from vinegar. The ingredients are cooked in a flavorful broth made from chicken or vegetable stock, soy sauce, and various seasonings. Hot and Sour Soup is known for its thick and velvety texture, which is achieved by adding cornstarch to the soup. It is often garnished with green onions and served as an appetizer in Chinese cuisine.