Bring mixture to a boil, then reduce to a simmer and stir about 10 minutes, until mixture becomes thick. (diginwithdana.com)
Cook until the sauce becomes thick and the cherries are tender — about 5 minutes. (jerryjamesstone.com)
The sauce will become thick as you whisk — simply add more water and keep whisking until it is the consistency of thickened cream. (arthurstreetkitchen.com)