Aged cheeses are cheeses that, after production, undergo a maturation period during which their texture, aroma, flavor, and structure change. Among the best-known in Italy are Parmigiano Reggiano PDO, Grana Padano PDO, Pecorino Romano PDO, Aged Asiago PDO, Montasio PDO, Bitto PDO, and Provolone Valpadana PDO.

However, there is no single number of days or months that defines all aged cheeses. Aging times depend on the type of cheese, the production method and, in the case of PDO products, the rules set out in the respective product specification.

In addition, “aged” does not necessarily mean “hard cheese”: there are short- or medium-aged cheeses that retain a soft or semi-hard paste. The length of aging and the texture of the cheese paste are, in fact, two different classification criteria.

In brief

  • Aged cheeses undergo a maturation period after production.
  • Aging can last weeks, months, or even years.
  • There is no universal minimum aging period that applies to all cheeses.
  • Parmigiano Reggiano and Grana Padano are hard cheeses with a slow maturation process.
  • Parmigiano Reggiano PDO has a minimum aging period of 12 months.
  • Grana Padano PDO has a minimum aging period of 9 months.
  • An aged cheese is not necessarily a hard cheese.
  • During maturation, moisture, texture, aroma, flavor, and structure change.
  • Aging alone does not determine whether any cheese is lactose-free.

In this page

What are aged cheeses?

An aged cheese is a cheese that, after the initial stages of production, is left to mature for a specific period under controlled conditions.

During this stage, natural transformations continue within the cheese paste. The product gradually loses part of its water content, while enzymes and microorganisms involved in maturation contribute to the evolution of proteins and fats.

The result is a gradual change in:

  • texture;
  • moisture;
  • aroma;
  • flavor;
  • color;
  • structure of the cheese paste;
  • characteristics of the rind.

Aging can vary greatly from one cheese to another. Some products mature for just a few weeks, while others require several months; cheeses such as Parmigiano Reggiano and Grana Padano can continue maturing for years.

For this reason, the term aged cheese identifies a very broad category rather than a single type of product.

Which cheeses are aged cheeses?

Some of the best-known Italian aged cheeses include:

  • Parmigiano Reggiano PDO;
  • Grana Padano PDO;
  • Pecorino Romano PDO;
  • Pecorino Sardo PDO;
  • Pecorino Toscano PDO in its aged versions;
  • Aged Asiago PDO;
  • Montasio PDO;
  • Bitto PDO;
  • Piave PDO;
  • Provolone Valpadana PDO;
  • Caciocavallo Silano PDO;
  • Fiore Sardo PDO;
  • Fontina PDO;
  • Gorgonzola PDO;
  • Taleggio PDO.

The list could be much longer, as Italy’s cheesemaking heritage includes many cheeses with different aging times and maturation techniques.

This list also shows why it would be wrong to think of aged cheeses as a category made up only of hard grating cheeses.

Parmigiano Reggiano and Grana Padano are examples of hard cheeses with a slow maturation process, while other aged cheeses retain semi-hard or soft textures.

List of the Best-Known Aged Cheeses

The following table provides a comparison of some representative examples.

Cheese Main milk type Cheese texture Aging
Parmigiano Reggiano PDO Cow's milk Hard Minimum 12 months, with aging that can continue for many years
Grana Padano PDO Cow's milk Hard Minimum 9 months, with longer aging periods and Riserva versions
Pecorino Romano PDO Sheep's milk Hard Variable depending on the intended use of the product
Aged Asiago PDO Cow's milk Compact, from semi-hard to hard as aging progresses Different aging periods
Montasio PDO Cow's milk From semi-hard to more compact as aging progresses Different maturation periods
Bitto PDO Cow's milk, with goat's milk where permitted by the product specification Semi-hard Can be aged for long periods
Provolone Valpadana PDO Cow's milk Stretched-curd cheese Different aging times depending on the type
Fontina PDO Cow's milk Semi-soft Matured
Gorgonzola PDO Cow's milk Soft and blue-veined Short or medium maturation depending on the type
Taleggio PDO Cow's milk Soft Relatively short maturation

The length of the aging period should therefore always be considered together with the specific characteristics of each cheese. For PDO products, the relevant product specification remains the authoritative reference.

How are cheeses classified according to aging?

There is no single commercial classification that applies to every type of cheese, but some general categories can be used as a practical guide.

For general reference, the Italian National Institute of Health distinguishes between:

  • fresh cheeses, which do not undergo aging;
  • short-aged cheeses, with a maturation period that can extend approximately up to 20–40 days;
  • medium-aged cheeses, with maturation lasting up to around 6 months;
  • slow-aged cheeses, with a maturation period of more than 6 months.

Cheeses such as Parmigiano are among the examples of slow-aged cheeses.

This classification is useful as a general guide, but it does not replace the specific rules established for each individual product. A PDO cheese, for example, may have a precisely defined minimum aging period and additional aging requirements.

To learn more about the general classification of cheeses, you can also consult the cheese information page on the ISSalute portal.

Fresh and aged cheeses: what are the differences?

The main difference lies in the maturation process.

A fresh cheese is consumed shortly after production and generally retains a higher water content, a softer texture, and aromatic characteristics closer to those of milk.

An aged cheese, on the other hand, evolves over time.

Characteristic Fresh cheeses Aged cheeses
Maturation None or very limited From short to very long
Moisture Generally higher Tends to decrease
Texture Often soft Can be soft, semi-hard or hard
Aroma More delicate and milky Tends to become more complex
Flavor Generally fresher and more delicate Can become more intense and persistent
Structure More elastic or creamy Can become compact, granular or friable

Aging does not automatically make a cheese “better.” It simply gives the cheese different characteristics.

A younger cheese may be preferable for more delicate preparations, while a longer aging period may be better suited when greater aromatic intensity, friability, or a texture suitable for grating and serving in shavings is desired.

Does aged cheese always mean hard cheese?

No. Aged cheese and hard cheese are not synonymous. Aging classifies a cheese according to the length and process of maturation.
The definition of hard, semi-hard, or soft cheese, on the other hand, mainly refers to the texture and moisture content of the cheese paste.

A cheese can therefore be:

  • aged and hard;
  • aged and semi-hard;
  • aged and soft.

Parmigiano Reggiano and Grana Padano are two particularly representative examples of hard cheeses with long aging periods. Other cheeses, however, mature while retaining a softer texture.

This distinction is important because it allows different types of aged cheeses to be classified correctly without limiting the category only to “grana-style” or grating cheeses.

What changes in cheese during aging?

Aging is not simply a matter of letting time pass. It is an active stage in the life of the cheese.

Moisture decreases

During maturation, the cheese gradually loses some of its water content. As a result, the cheese paste can become more compact and drier. In long-aged products, this process contributes to the development of particularly hard, friable, or granular textures.

The structure of the cheese paste changes

Proteins and fats continue to evolve during maturation.

The texture can change from more elastic and compact to more friable, granular, or naturally suited to forming shavings.

In Parmigiano Reggiano and Grana Padano, these changes are particularly noticeable when comparing younger and more mature aging stages.

More complex aromas develop

Over time, the aromatic profile also changes.

A younger cheese may show mainly delicate, milky notes. With longer maturation, more complex sensations can emerge, although these vary depending on the product, the milk, the cheesemaking process, and the aging period.

Flavor and persistence change

Saltiness, intensity, and persistence can also evolve.

This does not mean that a very mature cheese is always preferable: greater intensity may be ideal for tasting or for certain recipes, but less suitable when a more delicate flavor is needed.

Are Parmigiano Reggiano and Grana Padano aged cheeses?

Yes. Parmigiano Reggiano PDO and Grana Padano PDO are both Italian hard cheeses with a slow maturation process, but they are governed by different product specifications and have different minimum aging periods.

Parmigiano Reggiano PDO

Parmigiano Reggiano has a minimum aging period of 12 months.

From this point on, maturation can continue for much longer. Aging periods of 18, 24, 30, 36 months and beyond are common, including products characterized by very long aging.

Over time, the cheese paste tends to become drier, more crumbly, and more granular, while the aromatic profile generally becomes more intense and complex.

The BONI guide to Parmigiano Reggiano aging explains in greater detail how its characteristics and uses change from 12 months through to longer aging periods.

Grana Padano PDO

Grana Padano PDO can be marketed under this designation after a minimum aging period of 9 months.

Maturation can then continue. The main aging indications include Grana Padano Over 16 months and Grana Padano Riserva Over 20 months, as well as longer aging periods. Here too, the passing months progressively affect flavor, crumbliness, graininess, and aromatic intensity.

The BONI guide to Grana Padano aging explores the different aging ranges and their recommended uses in greater detail.

Parmigiano Reggiano and Grana Padano: aging Is not the only difference

Parmigiano Reggiano and Grana Padano are often associated with one another because they both belong to the family of Italian hard cheeses with long aging periods.

However, the number of months of aging represents only one of the differences.

Other differences include:

  • production area;
  • product specification;
  • certain rules concerning cattle feeding;
  • milk processing methods;
  • permitted ingredients;
  • sensory characteristics;
  • aging categories and designations.

For this reason, it is not correct to consider Grana Padano simply as a less-aged Parmigiano Reggiano, nor Parmigiano Reggiano as a Grana Padano aged for longer.

They are two distinct PDO cheeses, each with its own production identity.

Are aged cheeses lactose-free?

It is common to automatically associate long aging with the absence of lactose, but it is not correct to assume that any aged cheese is lactose-free based solely on the number of months it has been aged.

The amount of residual lactose depends on the product and its production process. To determine whether a cheese can be described as lactose-free or naturally lactose-free, it is important to refer to its specific characteristics, official information, and product label.

Parmigiano Reggiano PDO and Grana Padano PDO are two important examples: both are naturally lactose-free as a result of their respective production processes.

In Parmigiano Reggiano, lactose is naturally eliminated during the early stages of production, so it is not necessary to wait for 24, 30, or 36 months of aging for this characteristic.

For Grana Padano too, there is no need to choose a Riserva or a very long aging period solely because of lactose.

To learn more, see the BONI guide to lactose-free Parmigiano Reggiano and the in-depth article on Grana Padano and lactose.

Lactose intolerance should also be distinguished from an allergy to milk proteins: a naturally lactose-free cheese is still a dairy product and still contains milk proteins.

Which cheeses are long-aged?

Cheeses that continue aging for extended periods are generally considered long-aged or slow-maturing cheeses.

Some of the most representative Italian examples include:

  • Parmigiano Reggiano PDO;
  • Grana Padano PDO;
  • some types of Pecorino;
  • Bitto PDO;
  • some aged varieties of Asiago PDO;
  • some aged varieties of Montasio PDO;
  • Piave PDO in its more mature versions.

However, they do not all have the same aging times.

Parmigiano Reggiano has a minimum aging period of 12 months and can be aged for many years. Grana Padano, on the other hand, starts from 9 months and includes more mature categories such as Over 16 months and Riserva Over 20 months.

When referring to “long aging”, it is therefore always useful to specify which cheese is being discussed.

How to choose an aged cheese?

The choice depends mainly on how the cheese will be used and on the result you want to achieve.

For grating

Cheeses with a compact, dry and granular texture are particularly suitable, as they can be grated easily.

Parmigiano Reggiano and Grana Padano are two classic choices for pasta, risottos, soups, fillings and baked dishes.

For shavings

Good friability and a structure that naturally breaks into shavings are ideal for salads, carpaccio, cheese boards and dishes where the cheese is used as a visible ingredient.

Medium-aged or more mature Parmigiano Reggiano and Grana Padano are particularly well suited to this use.

For cooking

The longest aging period is not always the best choice.

A younger cheese may melt more easily and have a less dominant flavor. A more mature cheese, on the other hand, can add greater aromatic intensity and structure.

The choice should therefore depend on the recipe.

For tasting

When cheese is the main focus, more mature aging stages make it possible to appreciate structure, friability, persistence and aromatic complexity more fully.

In this case, comparing different aging periods of the same cheese can also be particularly interesting.

Aged cheeses for professional use

In professional channels, aging is also an important assortment criterion.

Large-scale retail, wholesalers, distributors, HoReCa and food service operators can select different products depending on:

  • desired flavor;
  • format;
  • intended use;
  • price range;
  • market positioning;
  • table use or grating;
  • portioning requirements;
  • destination market.

At Boni, we work every day with Parmigiano Reggiano PDO and Grana Padano PDO in different aging periods and formats.

Parmigiano Reggiano is produced in our dairies and managed throughout the supply chain, from aging to packaging and distribution. For Grana Padano, on the other hand, we handle selection, aging, packaging and marketing.

Different aging periods can be combined with whole Parmigiano Reggiano wheels, wedges, freshly grated Parmigiano Reggiano, shavings and other professional formats. For Grana Padano, whole wheels, portions and freshly grated Grana Padano are available for different sales channels and uses.

Frequently asked questions about aged cheeses

When is a cheese considered aged?

A cheese is considered aged when, after production, it undergoes a maturation period. However, there is no universal number of days or months: the duration and classification depend on the type of cheese and its specific production rules.

Are all aged cheeses hard cheeses?

No. Aging and texture are two different criteria. Aged cheeses can be hard, semi-hard, or even soft.

Are all aged cheeses lactose-free?

No. Lactose content cannot be determined solely on the basis of aging. The specific characteristics of the product and official information must be checked. Parmigiano Reggiano and Grana Padano are naturally lactose-free.