Ganache

Ganache is a glaze, icing, sauce, or filling for pastries and other sugar confectionery that is made from chocolate and cream. In the broad sense of the term, ganache is an emulsion between (melted) solid chocolate (which is made with cocoa butter, the fat phase) and a water-based ingredient, which can be cream, milk or fruit pulp. It has a smooth and shiny appearance. Depending on the ratio of cocoa butter and water in the finished product, ganache can be either semi-solid or liquid at room temperature, which allows its usage in a wide diversity of desserts and confectionery items.

Description: Wikipedia — Ganache, CC BY-SA 4.0