Why Real Parmigiano Reggiano Is Getting Harder to Make, and Worth Ordering While You Can

A brutal heatwave across Italy's Emilia-Romagna region is cutting into milk production for Parmigiano Reggiano, the true DOP cheese behind every good plate of pasta. Here is what is actually happening to the cows, the wheels, and the price, and why it makes a genuine plate worth savoring.

The heat is hitting the cows before it ever touches a wheel of cheese

Parmigiano Reggiano starts with one thing: milk from a specific region of Italy. That is the part currently under strain. A serious heatwave across Emilia-Romagna, the heart of Parmigiano production, has pushed temperatures past 104 degrees Fahrenheit this month, and dairy cows respond to that kind of heat the same way most animals do, by lying down more and eating less. That drop in feed intake translates directly into less milk, with reported declines of up to 10 percent during the worst stretches of heat.

It is worth remembering just how strict the rules are behind this cheese before assuming production could simply shift somewhere with a milder climate. Genuine Parmigiano Reggiano is made from exactly three ingredients, milk, salt and rennet, and by law it can only be produced in a handful of Italian provinces, almost entirely within Emilia-Romagna. There is no substitute region, no alternate milk source that still earns the name. When the cows in that specific area produce less milk, the entire supply chain feels it, full stop.

The warehouses are working overtime too

Milk supply is only half of the heat story. Every wheel of authentic Parmigiano Reggiano has to age for a minimum of 12 months, and the best examples age three years or longer, sitting the entire time in massive climate-controlled warehouses built specifically to hold the temperature and humidity these wheels need. Reporting on the current heatwave puts more than 500,000 wheels currently aging in storage, worth a combined figure above 300 million euros, all of it dependent on cooling systems working correctly through record heat.

Those cooling systems are running harder than usual right now, with reported energy consumption at some storage facilities up roughly 30 percent during the worst of the heat. That is not a cost that disappears quietly. Keeping hundreds of thousands of aging wheels at the right temperature during an unusually hot summer adds real operating expense on top of the reduced milk supply feeding into new wheels in the first place.

Even under pressure, demand keeps climbing, especially in the U.S.

Here is the part that makes this heatwave notable rather than just unfortunate: it is squeezing supply at the exact moment demand is rising, particularly in America. Parmigiano Reggiano's own industry consortium reports that exports now make up over half of all global sales, with the United States standing as its single largest foreign market. U.S. imports were already up roughly 2.3 percent, reaching close to 16,800 tons and representing 22 percent of all global exports, even before accounting for the most recent heat-driven supply pressure.

The consortium isn't slowing down its push into the American market either. Its president, Nicola Bertinelli, told an industry gathering in New York this summer that the goal is to make authentic Parmigiano Reggiano a genuine daily habit for American households, not an occasional splurge cheese, and the consortium has reportedly doubled its U.S. marketing investment to support that push. "Extreme heat impacts milk's quality and quantity," Bertinelli said, acknowledging the very real production pressure even while doubling down on growing American demand.

What this means for a plate of pasta tonight

None of this means the cheese is disappearing, but it is a good reminder of just how much genuine agriculture and craft sits behind a wedge that often gets treated as a pantry staple. A tighter milk supply and rising storage costs tend to work their way into pricing over time, even if that shift is gradual rather than immediate, and it is one more reason the difference between real DOP Parmigiano Reggiano and a generic grating cheese is worth caring about.

The next time a dish arrives with real Parmigiano Reggiano finished tableside, it is worth appreciating what actually got it there: a specific patch of Italian countryside, a herd of cows working through a heatwave, and a warehouse full of wheels aging exactly as long as tradition and law require. That is not marketing. That is just what it takes to get the real thing onto a plate, and it is exactly why we treat it that way here.

Five Things That Make Real Parmigiano Reggiano Worth the Difference

Not every hard, salty cheese on a menu deserves the name. Here's what actually sets the real thing apart.

1. Only three ingredients, ever: Milk, salt and rennet, with no additives or preservatives allowed under its protected designation.
2. Made in one specific region: By law, it can only come from a handful of provinces in and around Emilia-Romagna, not anywhere else in the world.
3. A minimum aging period, no shortcuts: Every wheel ages at least 12 months, with the best examples aged three years or longer.
4. Climate-controlled the whole way through: Wheels sit in warehouses built specifically to hold the right temperature and humidity for the entire aging process.
5. Rising demand hasn't loosened the standards: Even as U.S. demand climbs, the production rules and aging requirements haven't budged, which is exactly why supply can't just expand overnight.

← More from the La Piazza blog