Also known as carragheen or Irish moss, carrageen moss is a dark purple or green edible seaweed, used in most parts of Ireland and gathered on the rocks at low tide. It is also common on coasts in Northern Europe and North America.
When bleached and dried, carrageen will keep for years, and is used as a substitute for gelatine, being sold com-mercially
as a thickening agent. In Northern Ireland, carrageen is mixed with hot milk to serve as a nightcap or made into a pudding, and it has also been claimed that carrageen will cure in-digestion, coughs and colds.