couverture chocolate

US /kuːvərˈtʊr ˈtʃɑːklət/
UK /kuːvərˈtʊr ˈtʃɑːklət/
"couverture chocolate" picture
1.

a high-quality chocolate that contains a higher percentage of cocoa butter than other chocolates, used by chocolatiers for dipping, coating, molding, and garnishing

:
For the best results, use high-quality couverture chocolate for your truffles.
The glossy finish on the candies is achieved with couverture chocolate.