Bordier seaweed butter is a gourmet French butter, handcrafted in Brittany, France, that is infused with seaweed for a unique briny, salty, and savory flavor.  The butter is churned using a centuries-old process that includes hand-kneading with teak paddles to develop its distinctive quality, a method unchanged since the 19th century.  It is prized by chefs for its quality and is used for cooking, baking, or simply spreading on warm bread.