Korean plum extract (Maesil Wonaek, 매실원액) is made with Korean green plums (also known as Japanese apricot) by marinating them with honey or sugar for a few months. It has a sweet and mildly tangy taste, so when people add this plum extract in a recipe, they reduce the vinegar and/or sugar. Some people also use it when they make soju cocktail. Another popular way to enjoy this plum extract is drinking it as a tea (hot or cold) by diluting it with some water.