A dessert sauce is a sauce used for desserts. It is drizzled or poured atop various desserts, and is also used for plate decoration. Dessert sauce adds flavor, moisture, texture and color to desserts, may be cooked or uncooked, and is sometimes prepared as a hard sauce with the addition of alcoholic beverages. It is used in various manners to add flavor to and enhance the visual presentation of desserts.

In cooking, a sauce is a liquid, cream, or semi-solid food, served on or used in preparing other foods. Most sauces are not normally consumed by themselves; they add flavor, moisture, and visual appeal to a dish. Sauce is a French word taken from the Latin salsa, meaning salted. Possibly the oldest recorded European sauce is garum, the fish sauce used by the Ancient Romans, while doubanjiang, the Chinese soy bean paste is mentioned in Rites of Zhou in the 3rd century BC.