Here's How Long Parmesan Cheese Is Good For After Opening - Chowhound

Richard Levine/Getty Images No matter if you purchase pre-grated Parmesan (which we highly discourage) or opt to cut it up yourself (make sure you save that rind if you do), the shelf life of an opened package of Parmesan cheese is generally consistent throughout its many shapes, sizes, and ways of storage. According to the United States Department of Agriculture (USDA), both block and shredded hard cheeses last…