Chocolate sauce is a sweet and smooth liquid made from melted chocolate, often used as a topping or ingredient in various desserts. It can be made by melting dark, milk or white chocolate with other ingredients such as sugar, water, and sometimes eggs or cream. The consistency of the sauce can vary depending on how much liquid is added during the cooking process. Chocolate sauce adds a rich and indulgent flavor to desserts like ice cream sundaes, cakes, pancakes, waffles, and fruit dishes. It's also used as a decorative element for some dishes or drinks, such as hot chocolate.