A red seaweed found along the Irish coast that is used to thicken puddings, ice cream, and other foods.
From Irish Carraigín, meaning 'little rock,' referring to the rocky shores where this seaweed grows. The word entered English in the 18th century as trade in seaweed products increased.
Carageen is why your chocolate pudding is smooth instead of grainy—it's been used for centuries as a natural thickener, and it's completely edible and comes straight from the ocean.
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