Uses
Chondrus crispus is an industrial source of carrageenan, which is commonly used as a thickener and stabilizer in milk products such as ice cream and processed foods, including lunch meat. In Europe, it is indicated as E407 or E407b. It may also be used as a thickener in calico-printing and for fining beer or wine. Irish moss is frequently mixed with Mastocarpus stellatus (Gigartina mammillosa), Chondracanthus acicularis (G. acicularis) and other seaweeds with which it is associated in growth. Carrageenan and agar-agar are also used in Asia for gelatin-like desserts, such as almond jelly. Presently, the major source of carrageenan is tropical seaweeds of the genera Kappaphycus and Eucheuma.
In parts of Scotland (where it is known as (An) Cairgean in Scottish Gaelic) and Ireland, it is boiled in milk and strained, before sugar and other flavourings such as vanilla, cinnamon, brandy or whisky are added. The end-product is a kind of jelly similar to pannacotta, tapioca, or blancmange. Similarly, in Trinidad and Tobago it is boiled with cinnamon and milk to make a thick drink that is believed to be an aphrodisiac. in Venezuela has been used for generations for sore throat and chest congestion, boiled in milk and served with honey, it works better before bed.
Irish moss is commonly used as a clarifying agent in the process of brewing (beer), particularly in homebrewing. A small amount is boiled with the wort, attracting proteins and other solids, which is then removed from the mixture after cooling.
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