Tenuta Santa Maria di Gaetano Bertani - Valpolicella Verona Italy
Appassimento method Corvina grapes - Tenuta Santa Maria di Gaetano Bertani - Valpolicella, Verona

Appassimento

A Traditional Technique for Producing Amarone and Recioto della Valpolicella

The appassimento method, a pivotal stage in the production of Amarone and Recioto, constitutes an exclusive heritage of Valpolicella, a sophisticated expression of Veronese tradition that integrates environmental conditions, historical legacy, and technical proficiency. The temperate microclimate, optimal hillside ventilation, and the moderating influence of Lake Garda facilitate a gradual dehydration of the grapes (40-60%), concentrating sugars, acidity, and aromatic profiles of significant complexity. Rooted in Roman practices and refined over centuries, this process is inseparably tied to indigenous grape varieties such as Corvina and Rondinella, noted for their thick skins and ideal suitability for appassimento. Figures like Gaetano Bertani of Tenuta Santa Maria, a pioneer of contemporary Amarone, have optimized the technique in traditional drying lofts, expertly leveraging the region’s humidity and air circulation. This approach, unique to this region and recognized by DOCG status, enhances the Veronese terroir, yielding wines of impeccable structure and profound authenticity.

Acinaticum 1928 - Tenuta Santa Maria di Gaetano Bertani
Acinaticum 1928 - Tenuta Santa Maria di Gaetano Bertani

The History of Appassimento in Verona

Various records show that the practice of drying grapes to produce high-quality wines was deeply rooted in Verona’s winemaking culture since antiquity, though the specific terms “Recioto” and “Amarone” for these wines are more recent designations.

How Verona developed and preserved appassimento, making it a cornerstone of Valpolicella winemaking:

Roman Era

Pliny the Elder (Naturalis Historia, Book XIV, 77-79 AD) describes passum, a sweet wine from sun-dried grapes (Passum fit ex uvis siccatis ad solem), a precursor to Veronese techniques, widespread in Roman northern Italy and likely adapted locally.

Middle Ages

A 12th-century manuscript from San Zeno Basilica in Verona mentions a vinum dulce et pretiosum, a sweet, concentrated wine, hinting at appassimento methods inherited from the Romans and refined with local grapes.

15th-18th CENTURIES

Republic of Venice

Pier de’ Crescenzi (Ruralium Commodorum, 1304-1309) records grapes hung in ventilated spaces, a practice perfected in Verona, where Valpolicella rises as a premier winemaking hub.

16th CENTURY

A document from around 1550 references “Recioto,” from the dialect recia (ripe upper cluster), marking the formalization of sweet appassimento wines in the region.

1920s

Appassimento method and Acinaticum 1928 - Tenuta Santa Maria di Gaetano Bertani

Amarone emerges as “dry Recioto,” an evolution of the method with extended fermentation, yielding a rich, dry wine.

Modern
Recognition

The DOC (1968) regulates Amarone’s production and aging; the DOCG (2010) adds quality controls, sensory testing, and the “Riserva” label (updated 2014).

Historical fruttaio for the appassimento method - Tenuta Santa Maria
Historical fruttaio for the appassimento method - Tenuta Santa Maria

The Appassimento Process

The production of Amarone and Recioto begins with meticulous vineyard selection, choosing ripe, flawless grape clusters to ensure optimal quality during appassimento. This process concentrates sugars, acids, and aromatic compounds, with a 40-60% water loss, shaping the distinctive profile of these wines. The grapes are laid on arelle in the historic fruttai of Tenuta Santa Maria in Arbizzano di Negrar, 18th-century spaces designed with large windows to harness Valpolicella’s natural ventilation.

Without mechanical dehumidification, appassimento lasts 3-4 months, enabling slow dehydration that preserves aromatic and structural complexity. The arelle provide even airflow around the single-layered clusters, preventing mold and allowing precise monitoring. This traditional method maximizes component concentration, essential to the unique character of Amarone and Recioto.

How Aromas evolve during appassimento in native grape varieties

The drying process of the grapes transforms the aromas of fresh fruit into complex bouquets that shape Amarone’s unique identity. The richness of Verona’s native grape varieties, refined over centuries to just a select few, defines its distinct character.

Temporal Summary of the Appassimento Process

0-30 days

Primary aromas (fresh fruit, flowers) predominate, accompanied by an initial concentration of sugars and polyphenols

30-60 days

Secondary aromas (dried fruit, sweet spices) develop, with the release of terpenes and norisoprenoids

90-120 days

Tertiary aromas (leather, tobacco, cocoa) emerge, driven by the oxidation of polyphenols and the formation of glycerol and esters

Evolution of Aromas Across Different Varieties

The four primary varieties—Corvina, Corvinone, Rondinella, and Oseleta—stand out for their drying potential, owing to thick skins, a balanced acidity-to-sugar ratio, and resistance to botrytis. These attributes, which other grape varieties do not possess to the same extent in similar environments, distinguish them in the appassimento process.

Each grape variety evolves during appassimento according to its intrinsic characteristics, shaping the aromatic profile, structure, and aging potential of Amarone and Recioto.

Aromatic Precursors and Biochemical Processes

During natural appassimento (drying), concentration triggers a series of biochemical and physical reactions that alter the aromatic characteristics of the grapes, playing a pivotal role in developing the unique aromatic identity of Amarone.

Sugars (primarily glucose and fructose) within the grape berries are the initial protagonists. During appassimento, the grapes lose water (approximately 30-40% of their weight), concentrating these sugars.

EVOLUTION: Dehydration not only increases sugar concentration but also promotes glycerol formation through metabolic processes, sometimes aided by noble rot (Botrytis cinerea). Glycerol enhances the wine’s smoothness and serves as an indirect precursor to sweet, fruity aromas such as ripe fruit or jam.

RESULTING AROMAS: Notes of dried plum, brandied cherry, figs, and raisins.

Terpenes, aromatic compounds found in grape skins (especially in Corvina, the dominant variety in Amarone), exist in bound form (glycosides). These precursors remain non-volatile until released.

EVOLUTION: During appassimento, enzymatic activity and metabolic stress in the grapes facilitate glycoside hydrolysis, releasing volatile terpenes. The cold winter conditions of the fruttai (drying rooms) and controlled ventilation enhance this transformation.

RESULTING AROMAS: Floral hints (rose, violet), herbaceous or balsamic notes (mint, eucalyptus), though less prominent compared to aromatic varieties like Moscato.

Norisoprenoids, derived from the degradation of carotenoids in the grapes, are also present in glycosidic form.

EVOLUTION: Slow dehydration and oxygen exposure during appassimento activate the breakdown of these compounds, transforming them into aromatic molecules. This process peaks during the colder months (October to December), when aromatic evolution is most pronounced.

RESULTING AROMAS: Notes of dried fruit (dates, almonds), tobacco, and sweet spices (cinnamon, vanilla), which intensify with wood aging.

Tannins, anthocyanins, and other phenolic compounds concentrate in the skins during appassimento due to water loss and the thickening of cell walls.

EVOLUTION:These compounds undergo oxidation and polymerization, evolving into precursors of complex aromas. Extended post-appassimento maceration and aging in oak barrels amplify these transformations.

RESULTING AROMAS: Tertiary aromas such as leather, cocoa, roasted coffee, licorice, and dark spices (black pepper, cloves).

Acids such as malic and tartaric acid, naturally present in grapes, become concentrated during appassimento.

EVOLUTION: The reduction of malic acid (often metabolized into glycerol or other compounds) and its interaction with sugars lead to the formation of esters and aldehydes, enriching the aromatic profile. Controlled presence of Botrytis cinerea can further enhance this complexity.

RESULTING AROMAS: Hints of honey, candied fruit, and ethereal nuances.

Temperature, humidity, and ventilation during appassimento, paired with its duration, meticulously shape the pace and essence of aromatic transformations. Choices like using racks or crates, tending the grape clusters—perhaps with deft thinning—and opting for selected or wild yeasts in fermentation carve the final aromatic profile into a work of art.

Appassimento transcends mere sugar concentration: it’s a chemical stage where the aromas of native grapes dance, evolve, and reinvent themselves, crafting a singular bouquet that defines Amarone. Here, aromatic compounds don’t just intensify—they transform, painting nuances that elevate these wines to icons. Amarone and Recioto della Valpolicella sing a millennia-old tradition, masterfully honed by the Gaetano Bertani family: each glass narrates a tale of passion, evolution, and a visceral bond with Verona’s terroir.

The Wines of Tenuta Santa Maria

Combining traditional methods, advanced technology, and experience passed down through generations of family tradition, we produce wines that are the full expression of our land.