Coconut cream isn’t the same as cream of coconut, despite the name; the former is thick and mild-tasting, while the later is sweet and nearly syrupy. Coconut cream is closer to coconut milk, although it is much thicker, containing three or four times as much coconut mateer as the milk does.
It’s rarely used in cocktails, but the ones that do call for it are invariably thick, creamy, and luscious.
