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Cognac is a specific type of brandy produced from distilled white wine. Cognac production falls under French appellation d'origine contrôlée (AOC) designation, with production methods and naming required to meet certain legal requirements. The legal requirements for Cognac include the type of grapes used, the distillation process, and the aging process. Cognac must be distilled twice in copper pot stills and aged for at least two years in French oak barrels. The minimum alcohol volume allowed is 40%.
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What You'll Learn
Cognac is a type of brandy
Cognac is produced from distilled white wine, with the most widely used grape being Ugni Blanc, also known as Saint-Émilion or Trebbiano. Cognac must be distilled twice in copper pot stills, and the process must be completed between October 1 and March 31. The first distillation, known as the première chauffe, takes about eight to ten hours, resulting in a distillate known as brouillis with an ABV of 28-32%la bonne chauffe, takes 12 to 14 hours. Cognac must be aged in French oak barrels for a minimum of two years, with the majority of barrels coming from Limousin or Tronçais.
Cognac is classified by crus, or tightly defined geographic denominations where the grapes are grown. Each cru has distinctive soils and microclimates that give the eaux-de-vie unique characteristics. The crus include Grande Champagne, Petite Champagne, and Borderies. Cognac is also blended from different crus and harvests, and a small majority of producers add one of four legally allowed elements: distilled water, oak, sugar, or caramel.
The final product is a blend of at least two different aged eaux-de-vie, which can be from different vintages from the same vineyard or from different vineyards in the same year. The blending process is highly skilled, and the quality of the cognac is often reflected in the number of eaux-de-vie used in the blend. Cognac does not bear age labels but is categorized based on the minimum age of the eaux-de-vie in the blend.
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Minimum ageing requirements
Cognac is a specific type of brandy produced from distilled white wine. It must be distilled twice, using copper pot stills, and aged in French oak barrels for a minimum of two years before it can be sold to the public. The current legally defined categories of Cognac include: V.S., which denotes eau de vies with a minimum age of two years.
The minimum ageing period for Cognac is crucial to ensuring the spirit's quality and compliance with legal requirements. After distillation, the clear liquid, eau-de-vie, is piped directly into wooden casks, typically at an alcohol by volume strength of around 70%. The interaction between the Cognac and the oak barrel, as well as exposure to air, results in an annual evaporation rate of about 3%, gradually reducing both alcohol and water content. This process, known as "la part des anges" or "the angels' share," imparts unique flavours and aromas to the Cognac.
The ageing process also involves blending different eaux de vie to achieve a complexity of flavours. Cognac houses employ master blenders or cellar masters to combine spirits from various vintages, vineyards, and crus. This blending craft is akin to the work of a "Master Nose" in a perfume house. The final product is categorised based on the minimum ages of the eaux de vie in the blend, rather than bearing age labels.
While the minimum ageing requirement for Cognac is two years, most Cognacs are aged considerably longer than the legal minimum. The ageing process in oak barrels contributes to flavour development for up to four or five decades, after which the barrels stop imparting additional flavours. Consequently, longer ageing periods may not always result in significant improvements in flavour. The age of a Cognac is determined by the youngest component used in the blend.
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Grape varieties
Cognac is a variety of brandy named after the commune of Cognac in France. It is produced in the surrounding departments of Charente and Charente-Maritime, in an officially designated wine-growing region. Cognac production falls under French appellation d'origine contrôlée (AOC) designation, with production methods and naming required to meet certain legal requirements.
Among the specified grapes, Ugni Blanc (or Trebbiano) is the most widely used, accounting for over 95% of grapes grown in the region. It is a late-maturing variety that is resistant to rot and grey mould. It produces a wine with high acidity and relatively low alcohol content (8 to 9% vol.), ideal for distillation into cognac. The high acidity also ensures good natural ageing potential, and the wine produced has delicate, floral flavours and aromas.
Folle Blanche is another grape variety used in cognac production. It has been used to make smooth cognac for centuries and is known for producing well-balanced wine with strong aromas. However, it was a primary victim of the phylloxera crisis and is now more sensitive to disease, representing less than 1% of vines planted in France.
Colombard is one of the oldest surviving grape varieties in the Charente region, known for its high acidity and low sugar levels. It is usually blended with other grape varieties and is appreciated for its powerful aromatic potential. While it is still used in cognac production, its use has declined since the 1990s.
Other grape varieties used in cognac production include Montils, Sémillon, Sélect, Meslier St-François (also called Blanc Ramé), Jurançon blanc, and Folignan. These varieties make up a smaller percentage of the grapes used in cognac, with Folignan and Sélect each having an authorized limit of 10%.
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Blending
The art of blending is a highly skilled craft, and each Cognac house has a master taster (maître de chai) responsible for ensuring that the final product maintains a consistent house style and quality. The master blender must carefully select and combine the different eaux-de-vie to create a harmonious blend that reflects the desired flavour profile of the Cognac house. This process is similar to blending whisky or non-vintage Champagne, where the goal is to achieve a consistent brand flavour.
The eaux-de-vie used in Cognac blending can vary in age, with some Cognacs being blends of up to 150 different eaux-de-vie. The age of a Cognac on the label is determined by the youngest component in the blend, rather than the average or oldest age. This means that a Cognac labelled as V.S. (Very Special) or * has a minimum age of two years, as this is the minimum ageing requirement for Cognac to be sold.
While blending primarily involves combining different eaux-de-vie, some Cognac producers also add other legally permitted elements to enhance the final product. These additives include distilled water to reduce alcohol volume, oak (boise) to accelerate ageing and impart tannin colour, sugar, and caramel. These additives are used sparingly to ensure that the Cognac retains its distinctive character and meets the legal requirements for brandy, which specify a minimum alcohol content of 40% ABV.
The blending process for Cognac is a delicate balance between art and science, requiring a deep understanding of the various eaux-de-vie and their unique characteristics. It is a dynamic process that may vary from year to year, depending on the quality of the grapes and the specific flavours desired by the Cognac house. Ultimately, blending is a critical step in creating the complex, nuanced flavours that have made Cognac a renowned and sought-after spirit worldwide.
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Distillation methods
Cognac distillation is a two-stage process performed in a specific Charentais copper still with a pot, swan necks, a cooler, and a condensing coil. The first stage involves boiling the white wine, which is harvested in the Controlled Appellation Area, to produce a cloudy liquid called "brouillis" with an alcohol volume of 28% to 32%. The second stage, called "bonne chauffe", involves returning the brouillis to the boiler for a second distillation to produce the "eau-de-vie" (French for spirit), which should not exceed 72% ABV. The total capacity of the still must not exceed 30 hl, with a load volume limited to 25 hl. The first liquid obtained during this second distillation, which is very rich in alcohol, is discarded.
The double distillation process is a crucial step in the creation of Cognac, transforming the fermented grape juice into a clear and aromatic eau-de-vie. The eau-de-vie, with its high alcohol content and concentrated flavours, forms the base of Cognac, and the ageing process in oak barrels further develops its unique character and flavour profile. The combination of traditional methods and modern technology creates a spirit that is both timeless and unique, making Cognac a truly exceptional drink.
The first distillation, known as the brouillis, produces a low-alcohol spirit with a high concentration of aromatic compounds. The second distillation, called the bonne chauffe, produces the eau-de-vie, which is the final product of distillation. The first distillation lasts about eight to ten hours, while the second lasts twelve to fourteen hours. The clear liquid, eau-de-vie, is then piped directly into wooden casks.
The distillation process is instrumental in forming the spirit's identity and influencing its final taste and profile. Alcohol is derived from sugar, which is transformed into ethanol (alcohol) through a fermentation process. The distillation process does not directly produce alcohol but concentrates the alcohol contained in a fermented liquid. Different distillation methods, such as the "fatty distillation" method, can be used to incorporate a wide spectrum of elements into the final results, such as aromatic esters and fatty acids.
Cognac is classified by crus, tightly defined geographic denominations where the grapes are grown. The distinctive soils and microclimates of these crus produce eaux-de-vie with unique characteristics. Blending eaux-de-vie from different crus and harvests is common, and a small majority of Cognac producers also add legally allowed elements such as distilled water, oak, sugar, and caramel.
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Frequently asked questions
Cognac is a type of brandy, distilled from white wine.
Cognac must be distilled twice in copper pot stills. The distillation process must occur between October 1 and March 31. The wine used cannot contain added sulfites.
Cognac must be aged for a minimum of two years in French oak barrels from Limousin or Tronçais, Allier or Nevers.
