Parmigiano Reggiano is produced exclusively in the provinces of Parma, Reggio Emilia, Modena, Bologna to the left of the Reno river, and Mantua to the right of the Po river. It takes about 550 litres of milk to produce each wheel of Parmigiano Reggiano. The milk slowly and naturally coagulates with the addition of rennet and a whey starter, rich in starter cultures, from the previous day’s processing. The minimum maturation time is 12 months, the longest among all the PDO cheeses, and only at this point can it be decided if each individual wheel is worthy of the name it was given at its birth, and therefore continue the maturation up to 24, 36, 40 months and more.
