"Cheese milestone" in Wisconsin: 20 year-old cheddar for sale 4095477548_9df1e5a419_z.jpg Already sold outMost cheddar cheese is only a few months old. A particularly extra-sharp cheddar may have been aged for as much as 15 months. Read more about "Cheese milestone" in Wisconsin: 20 year-old cheddar for saleAdd new comment