The primary ingredient in clam chowder is clams. This dish is popular in the northeastern United States, especially New England, and is known for its creamy consistency and rich flavor. Clams, along with ingredients such as potatoes, onions, celery, and cream or milk, form the base of traditional clam chowder. Variations exist, including Manhattan clam chowder, which features a tomato-based broth instead of cream. The inclusion of clams not only adds flavor but also provides protein and important nutrients, making clam chowder a hearty and comforting dish enjoyed by many.