Kirschwasser (German for "cherry water") , often known simply as Kirsch (from German "Kirsche" for "cherry") in the English-speaking world, is a clear brandy made from double distillation of the fermented juice of a small black cherry. It is colorless because either it is not aged in wood or it is aged in barrels made of ash. The cherries can be either sweet or sour. As the morello cherry was originally grown all around the Black Forest in southern Germany, the drink is believed to have originated there.
Kirsch is an essential ingredient in Swiss cheese fondue