Ganache is a rich and creamy mixture made from chocolate and cream, commonly used in desserts. It is created by heating cream and then pouring it over chopped chocolate, allowing the chocolate to melt. The mixture can be stirred until smooth and glossy, resulting in a versatile ingredient that can be used for frosting, filling, or glazing. Ganache can be made with different types of chocolate, such as dark, milk, or white chocolate, depending on the desired flavor and sweetness. It can also be flavored with various ingredients like vanilla, coffee, or liqueurs to enhance its taste, making it a popular choice in many pastry recipes.