decoction

dekoktin valmistus An extraction or essence of something, obtained by boiling it down.
1993, Anthony Burgess, A Dead Man In Deptford

Poley offered a hot decoction of blackberries, saying: Peace?

Witches and devils no longer threaten you and me. We don’t mind living next door to the harmless lady with her herb garden and decoction still, her black cat and red hair.