Irish Moss

What Is Irish Moss?

Despite its name, Irish moss isn’t moss at all—it’s a type of red seaweed (Chondrus crispus for the science geeks out there) harvested from the Atlantic Ocean. Rich in carrageenan, Irish moss is a natural clarifier that has been used in brewing for centuries. When added during the boil, Irish moss causes proteins in the wort to coagulate and form larger clumps, making them easier to separate during the brewing process.

Usage

• Preparation: pre-soak Irish moss in a small amount of warm water for 15–30 minutes before adding it to the boil.

• Add about 1 teaspoon per 5 gallons of wort, 10–15 minutes before the end of the boil.

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