An edible seaweed that proliferates along the Irish shoreline, known in that region as carrageen or dulse. This seaweed is employed as a gelatinous foundation in a variety of desserts, including one in which it is boiled with milk, sugar, and lemon juice to form a type of custard. The same title is also assigned to the dessert produced in this manner.
Chondrus crispus, a type of seaweed with a dark purple or green hue, can be found along numerous coasts in Northern Europe. When it is harvested, dried, and bleached, it can be utilized as a replacement for gelatin. Additionally, this seaweed is frequently employed as a thickening agent in commercial applications.