Unpasteurized Cheese

What Unpasteurized Cheese Is

For most of cheese's history, all cheese was unpasteurized. Heating milk to kill bacteria is a relatively modern technique — Louis Pasteur worked it out in the 1860s, and it only became standard for commercial dairy in the twentieth century. Even now, traditional European cheesemaking uses raw milk for many of its great styles, and U.S. artisan producers use it for some of theirs. Unpasteurized cheese is exactly what it sounds like: cheese made from milk that hasn't been heated to the temperatures (around 161°F for fifteen seconds, in the modern method) that wipe out bacteria. The same product is also called raw milk cheese — different words, same thing. The reason cheesemakers care about the distinction is that pasteurization changes the milk's microbial profile. Pasteurized milk produces excellent cheese — most great American and many great European cheeses are pasteurized. Raw milk produces a different kind of cheese, one that carries more of the native bacteria, yeasts, and enzymes from a particular pasture, climate, and dairy. For certain aged styles, that microbial complexity is part of what defines the cheese.

A common confusion is worth clearing up: unpasteurized cheese is not the same as unaged cheese. Plenty of unpasteurized cheeses are aged for years — Parmigiano Reggiano, Comté, Gruyère, aged Manchego, traditional cheddar, Roquefort. The opposite is also true: most fresh, unaged cheeses sold in the United States (mozzarella, ricotta, fresh chèvre, mascarpone) are made with pasteurized milk for safety reasons. Aging is a different decision from pasteurization, and the two often go together but don't have to.

The 60-Day Rule and What's Legal in the U.S.

The United States has a specific rule about raw milk cheese: it can be sold in the country if it has been aged for at least 60 days. The reasoning is that during 60 days of aging, the salt, acid, and time work together to reduce the bacterial population to safe levels. This means certain unpasteurized cheeses arrive in the U.S. exactly as they're made in Europe, while others (the soft, young, raw-milk cheeses) either come in pasteurized versions or don't come at all.

Most aged Italian, French, Spanish, Swiss, and British cheeses clear the 60-day threshold by a comfortable margin. Parmigiano Reggiano DOP, for instance, is always raw-milk and is aged at least 12 months — a year past the legal minimum. Comté has a four-month minimum, Gruyère and Beaufort longer still. Aged Manchego and clothbound English cheddar fall in the same camp. The cheeses that don't qualify are the ones Europe is famous for in their fresh form: true young Camembert, fresh Reblochon, raw-milk young Brie, the youngest Vacherin Mont d'Or. Those styles arrive in the U.S. only as pasteurized versions, or as thermized versions (heated less aggressively than full pasteurization, but still treated). Anyone who has eaten an unpasteurized young Camembert in a French market and the U.S. version on a board back home knows the difference, and the gap is the 60-day rule at work.

Examples of Unpasteurized Cheeses

For shoppers looking for an actual list of raw-milk cheeses, the major examples sort into a few categories. Aged hard Italian cheeses are the largest group: Parmigiano Reggiano, Pecorino Romano, Grana Padano, Pecorino Toscano, Asiago d'Allevo, and aged Provolone are all raw-milk by tradition and law. The full Italian cheese collection is heavily weighted toward these.

France contributes the second major cluster. Comté, Beaufort, Salers, Cantal, aged Mimolette, Roquefort, and traditional Brie de Meaux are all raw-milk in their authentic form. The U.S. versions are sometimes pasteurized for legal reasons, but the aged styles (anything 60 days or older) typically arrive as the genuine raw-milk article. The French cheese collection includes both versions where applicable.

The British and Spanish contributions are smaller but distinct. Aged clothbound English cheddar from producers like Montgomery's and Keen's is raw-milk, as is traditional Stilton (one of only a handful of British blue cheeses with PDO status). Spanish Manchego is raw-milk in its 12-month and Reserva forms, though the supermarket 6-month version is usually pasteurized. The aged cheese collection overlaps significantly with raw-milk styles, since the 60-day rule makes aging and raw-milk status close partners in the U.S. market.

The domestic raw-milk story is small but real. Vermont's Jasper Hill Farm has built a reputation on raw-milk cheeses — Bayley Hazen Blue and Cabot Clothbound Cheddar are the two best-known, both heavily aged and both distinctively American in profile. Oregon's Rogue Creamery makes several raw-milk blues — Oregon Blue, Caveman Blue, and Smokey Oregon Blue among them — that have helped put American raw-milk cheesemaking on the international map. A handful of farmstead producers in Wisconsin, Vermont, and California round out the category. These are the cheeses to look for if a buyer wants raw-milk character without the import complications, and they sit comfortably alongside the European staples on a serious cheese board.

What Raw Milk Brings to Aged Cheese

The case for raw-milk cheese is specific rather than universal. It's not that raw milk produces better cheese; pasteurized milk produces plenty of excellent cheese, including most of the world's best fresh and soft-ripened styles. The case is that raw milk brings something particular to certain aged cheeses — a layered complexity that comes from the native bacteria, yeasts, and enzymes the milk carries before any cultures are added. Aged Parmigiano Reggiano, Comté, Roquefort, aged Manchego, and traditional cheddar all developed their characteristic flavors through centuries of raw-milk practice. The microbial population of the milk is part of the recipe.

The textural difference is the other variable. Raw milk holds onto more of its enzymes during aging, which means proteins break down differently and the paste develops a particular kind of springiness or graininess depending on the cheese. The crystal-laced texture of well-aged Parmigiano Reggiano, the brown-butter notes of mature Comté, the meaty depth of long-aged clothbound cheddar: these qualities trace back to the milk's microbial profile. They're part of why cheesemakers preserve the raw-milk tradition for these specific styles. Pasteurization works for different purposes. It allows the consistent production of fresh and soft-ripened cheeses like mozzarella, ricotta, fresh chèvre, and American Brie. It's also the standard for most American artisan cheese, for both safety and consistency reasons. Different cheeses, different decisions.

For buyers curious about the raw-milk profile specifically, a useful starting point is to taste a long-aged Parmigiano Reggiano (always raw-milk and always aged at least 12 months) against an aged pasteurized hard Italian-style cheese. The contrast in flavor character — not better or worse, but different — is the clearest illustration of what raw milk contributes to an aged cheese. From there, the same comparison works with cheddar or any other style available in both forms.

Also Worth Exploring

For raw-milk blue cheeses specifically — Roquefort, Stilton, Bayley Hazen Blue, and Rogue Creamery's Caveman Blue all sit in this category — the blue cheese collection is where to start. Most are aged well past the 60-day rule and arrive in the U.S. as the original raw-milk version.