Powidl

Powidl is a plum butter, a type of fruit spread prepared from the prune plum, that is popular in Central Europe. Unlike jam or marmalade, and unlike the German Pflaumenmus (plum puree), powidl is prepared without additional sweeteners or gelling agents. Powidl is cooked for several hours, in order to achieve the necessary sweetness and consistency. The plums used should be harvested as late as possible, ideally after the first frosts, in order to ensure they contain enough sugar. In Austria, Moravia and Bohemia, powidl is the basis for Buchteln, powidl cake and Germknödel, but it is also used as a sandwich spread. Powidl will keep for a long time, especially if kept in traditional crockery.

Source: Wikipedia