Plum sauce is a viscous, light brown sweet and sour condiment generally used in Chinese cuisine as a dip for deep-fried dishes, such as spring rolls, egg rolls, noodles, and deep-fried chicken balls as well as for roast duck. It is made from sweet plums or other fruit such as peach, pineapple or apricot, along with sugar, vinegar, salt, ginger and chili peppers.