Corn chowder is a thick cream-based soup or chowder. Corn chowder is mass-produced as a canned food in the U.S. Corn chowder is a chowder soup prepared using corn as a primary ingredient. Corn chowder may be prepared with fresh, frozen, or canned corn. Corn chowder is a mass-produced canned food product in the United States. Some people serve basic corn chowder as a vegetarian alternative to clam chowder. Safeway Inc. markets a corn chowder under their "Signature Cafe" store brand. Basic corn chowder is commonly made of corn, onion, celery, milk or cream, and butter.