This dark-purple dessert soup is a Swedish staple that is traditionally prepared with a combination of fresh bilberries or (optionally) blueberries, cornstarch, sugar, and water. It can be served hot or cold, depending on the season, and is often regarded as a health remedy.

Although it is usually enjoyed as sweet soup, preferably topped with a dollop of whipped cream, it is best known as a beverage that is served during Vasaloppet - the world's oldest, longest, and biggest cross-country ski race that takes place in Sweden.