For the best flavor, use ripe, seasonal cherries. Bing or Rainier cherries work particularly well. Adjust the amount of balsamic vinegar to your taste. Start with 1 tablespoon and add more if desired. If you don't have an ice cream maker, you can still make this ice cream using the no-churn method. Simply pour the mixture into a freezer-safe container and freeze for at least 6 hours, stirring every hour to prevent ice crystals from forming.