Zabaglione, also known as zabajone or sabayon, is a classic Italian dessert sauce that is made by whisking together egg yolks, sugar, and a sweet wine, such as Marsala. The mixture is heated gently over a double boiler or bain-marie while continuously whisking until it becomes thick, creamy, and airy. Zabaglione has a rich and velvety texture with a sweet and slightly tangy flavor from the wine. It can be served warm or chilled and is often enjoyed on its own as a dessert or used as a topping for fresh fruit, cakes, or pastries.