A ganache is a rich mixture made from chocolate and cream. It is commonly used in desserts, providing a smooth and creamy texture. The ratio of chocolate to cream can vary, affecting the ganache's consistency, which can be thick for truffles or thinner for glazes. To make ganache, heat the cream until it simmers, then pour it over chopped chocolate. Stir until the chocolate melts and the mixture is smooth. Ganache can be flavored with ingredients like vanilla, coffee, or liqueurs, making it versatile for various sweet treats, including cakes and pastries.