Parmigiano Reggiano
Protected Designation: It’s a PDO (Protected Designation of Origin) cheese. Only cheese made in specific regions of Italy (Parma, Reggio Emilia, Modena, parts of Bologna and Mantua) can legally be called Parmigiano Reggiano.
Strict Standards: Made using traditional methods, specific cow’s milk, and aged a minimum of 12 months (often 24–36 months or more).
Flavor Profile: Crumbly, granular texture with complex, nutty, savory, and slightly fruity notes.
Labeling: Authentic wheels are stamped with Parmigiano Reggiano rind markings.
Parmesan
Generic Term: Outside the EU, “Parmesan” can legally refer to any hard, grating cheese inspired by Parmigiano Reggiano, even if it’s not made in Italy.
Production: Often made in the U.S. or elsewhere with fewer restrictions. Aging time may be as short as 10 months (sometimes less).
Flavor Profile: Can be tasty, but usually milder, saltier, and less nuanced than true Parmigiano Reggiano.
Forms: Widely sold pre-grated or powdered, sometimes with additives like anti-caking agents.
Parmigiano Reggiano = Authentic, traditional, Italian, PDO-protected.
Parmesan = A broader, often mass-produced imitation, quality can vary.
So, all Parmigiano Reggiano is Parmesan, but not all Parmesan is Parmigiano Reggiano
