Couverture is high-grade chocolate formulated with an unusually high proportion of cocoa butter — the professional confectioner's chocolate, made to be tempered, then dipped, moulded and enrobed. The extra fat makes it thin and free-flowing when melted, so it coats sweets in a thin, glossy shell that sets with a mirror sheen and a clean snap; the name is French for "covering," and it comes in dark, milk and white grades.