Catch the juice from a large glass of morello cherries (approx. 300 ml).
In a small saucepan, moisten the sugar with 1 tablespoon of water and let it caramelize without stirring. Pour in the cherry juice (be careful, it can splash!) And add the spices.
Reduce to about half of the liquid. Then add the balsamic vinegar and reduce to about half the amount again. Then fill into bottles through a close-meshed sieve or filter.