What is kosher wine?

Yhe rabbinical laws governing kosher designation for wines are far more complicated than those regarding food. Some of the rules – when you can first use the grapes, what other crops can be grown nearby – are fairly simple to meet. Two that are not so easy: The juice must be heated – a process that many vintners believe adversely affects taste. And during the process from crushing to bottling, only observant Jews can handle the product in any way, including tapping for barrel tastings, transporting and bottling.