Prosecco[a] is an Italian wine controlled by DOC or DOCG. Under these wine laws, Prosecco can be spumante ("sparkling wine"), frizzante ("semi-sparkling wine"), or tranquillo ("still wine"). It is made from Glera grapes, (formerly known also as Prosecco), but other authorised grape varieties may be included up to a maximum of 15%. Those varieties that can be included with Glera are Verdiso, Bianchetta Trevigiana, Perera, Chardonnay, Pinot Bianco, Pinot Grigio and Pinot Noir vinified white. The name Prosecco is derived from the Italian village of Prosecco near Trieste, where the grape and the wine may have originated.
Prosecco DOC is produced in nine provinces spanning the Veneto and Friuli Venezia Giulia regions. Meanwhile, Prosecco Superiore DOCG comes in two forms: Prosecco Conegliano Valdobbiadene Superiore DOCG, which can only be made in the Treviso province of Veneto on the hills between the towns of Conegliano and Valdobbiadene (north of Treviso), and the nearby smaller Asolo Prosecco Superiore DOCG, across the River Piave and produced near the town of Asolo.
In Trieste at the beginning of the sixteenth century, the local wine "Ribolla" was promoted as the recreation of the Pucinian  celebrated by Pliny the Elder in his Natural History and praised for its medicinal qualities by Livia, the wife of Emperor Augustus. The need to distinguish the "Ribolla" of Trieste from other wines of the same name, produced in Gorizia and at lower cost in Istria, led, at the end of the century, to a change in name. Following the supposed place of production in antiquity, the wine was referred to as "castellum nobile vinum Pucinum", after the castle near the village of Prosecco.
The first known mention of the name Prosecco is attributed to the Englishman Fynes Moryson, although he used the spelling Prosecho. Moryson, visiting the north of Italy in 1593, notes: "Histria is devided into Forum Julii, and Histria properly so called ... Here growes the wine Pucinum, now called Prosecho, much celebrated by Pliny". He places Prosecco among the famous wines of Italy: "These are the most famous Wines of Italy. La lagrima di Christo and like wines neere Cinqueterre in Liguria: La vernazza, and the white Muskadine, especially that of Montefiaschoni in Tuscany: Cecubum and Falernum in the Kingdom of Naples, and Prosecho in Histria".
The method of vinification, the true distinguishing feature of the original Prosecco, spread first in Gorizia, then – through Venice – in Dalmatia, Vicenza and Treviso. In 1754, the word Prosecco appears for the first time in the book Il roccolo Ditirambo, written by Aureliano Acanti: "And now I would like to wet my mouth with that Prosecco with its apple bouquet".
Up until the 1960s, Prosecco sparkling wine was generally rather sweet and barely distinguishable from the Asti wine produced in Piedmont. Since then, production techniques have improved, leading to the higher quality wines produced today. According to a 2008 New York Times report, Prosecco rose sharply in popularity in markets outside Italy, with global sales growing by double-digit percentages since 1998, aided also by its comparatively low price. It was introduced into the mainstream US market in 2000 by Mionetto, now the largest importer of Prosecco, who also reported an "incredible growth trend" in 2008. Consumption also ballooned in the UK, which became, in the mid-2010s, the biggest export market for Prosecco, consuming fully one quarter of all Italian production.
Until the 2008 vintage Prosecco was protected as a DOC within Italy, as Prosecco di Conegliano-Valdobbiadene, Prosecco di Conegliano','Prosecco di Valdobbiadene' and 'Prosecco di Colli Asolani'. From 2009, these two area were promoted to DOCG status. To further protect the name, an association of traditional Prosecco growers advocated a protected designation of origin status for Northern Italian Prosecco under European law. Hence, since 1 January 2010, Prosecco is, according to an order of the Italian Minister of Agriculture of 17 July 2009, no longer the name of a grape variety (now to be called Glera), but exclusively a geographical indication. This was confirmed by EG-Regulation Nr. 1166/2009 of 30 November 2009.. The Colli Asolani Prosecco Superiore DOCG later changed its name to Asolo Prosecco Superiore DOCG in 2014.
Unlike Champagne and Franciacorta DOCG, Prosecco usually is produced using the alternative Charmat–Martinotti method, in which the secondary fermentation takes place in large stainless steel tanks rather than in each individual bottle, making the wine less expensive to produce, and the minimum production time is 30 days. Higher quality Prosecco using this method will ferment the wine over a longer period, up to around 9 months (Charmat Lungo). Nevertheless, the production rules for both the DOCG's also allow the use of the traditional method of secondary fermentation in the bottle, known in Italy as Método Classico.
In the region of Conegliano and Valdobbiadene DOCG, there are more than 150 producers, and together they form the Consortium for the Protection of Prosecco from Conegliano and Valdobbiadene (Consorzio per la Tutela del Prosecco di Conegliano e Valdobbiadene). Asolo DOCG has its own Consorzio, with 94 producers.
Most Prosecco, whether DOC or DOCG, is made as Spumante sparkling wine or Frizzante (semi-sparkling). Prosecco DOC Spumante is the most famous and popular variety, with longer-lasting bubbles. Prosecco DOC Frizzante has less lingering bubbles. A small proportion is made as Tranquillo (still wine), with no bubbles. (Tranquillo) amounts to only about five per cent of production, and this wine is rarely exported.
Depending on their sweetness, in accordance with the EU Sweetness of wine Regulations for Terms used to indicate sweetness of sparkling wine, Proseccos are labelled "Brut" (up to 12 grams per litre of residual sugar), "Extra Dry" (12–17 g/l) or "Dry" (17–32 g/l). Extra-Dry has been the dominant style made, but the amount of Brut is now increasing.
Glera grapes made in a Prosecco style outside the DOC/DOCG has a non-protected designation, such as "IGT Veneto", are generally cheaper and of more variable quality and cannot be called Prosecco.. While all Prosecco is currently vinified white, a Rosé version has been proposed, but only for the DOC, as it was rejected by the DOCG. It is likely that such a Rosé, which would include a small proportion of Pinot Noir vinified red, will be adopted only at the DOC level from the 2019 harvest and therefore be available to buy from as early as January 2020.
Prosecco Superiore DOCG
There are two Prosecco Superiore DOCG's, divided by the River Piave, in the Treviso province of Veneto. Prosecco Conegliano Valdobbiadene Superiore DOCG, is made on the hills between the towns of Conegliano and Valdobbiadene. Producers from Valdobbiadene have recently tended to skip the mention of Conegliano on their front label, calling their wine Valdobbiadene Prosecco Superiore. The second DOCG is the smaller Asolo Prosecco Superiore DOCG, produced on the hills near the town of Asolo. Currently, in addition to the usual range of Prosecco styles, Asolo DOCG can also make an "Extra-Brut" (0-6 g/l), and Conegliano Valdobbiadene is expected to introduce this style soon. While the bulk of Prosecco DOC is grown on low-lying plains in an extended area covering 23,300 hectares, the DOCG Prosecco Superiore is grown exclusively on hillside vineyards in two far smaller growing areas, being 6,860 hectares for Conegliano Valdobbiadene and 1,783 hectares for Asolo. The steepness of the hills means that everything, from pruning to picking, is principally done by hand. The manual aspect, especially for the harvest, further increases quality.
Superiore di Cartizze subzone
The hill of Cartizze is a 305 metres (1,001 ft) high vineyard of 107 hectares (260 acres) of vines, owned by 140 growers. The Prosecco from its grapes, of which comparatively little is produced, is widely considered to be of the highest quality, or even the "Grand Cru" of Prosecco. Theoretically, a hectare of Cartizze grape land was estimated to be worth in excess of 1 million US dollars in 2008 and its value was estimated to have increased to 1.5–2 million euros in 2015, the most for a vineyard in Italy. The sparkling wine produced from Cartizze has recently been named by producers as Superiore di Cartizze, without mentioning Prosecco on the front label to further emphasize its territory.
According to a local legend, Cartizze grapes traditionally were harvested last, as the vines were situated on steep slopes and hard to reach, which led to vintners discovering that this extended ripening period improved the flavour. Nonetheless, in a blind tasting at the 2006 Vinitaly trade fair, Cartizze spumanti were ranked consistently behind "normal" Prosecco.
While Cartizze is a subzone at the top of the Prosecco Conegliano Valdobbiadene Superiore DOCG quality pyramid, their Consorzio has also introduced official Rive delimitations, i.e. 15 communes that can make 43 different Rive subzone wines. These are named after the individual hills where the grapes originate, though this adds complexity and adoption so far is patchy. The intention is to highlight the different microclimates and distinct terroirs found in the DOCG.  Asolo Superiore DOCG has not introduced subzones.
Some winemakers are reviving the traditional Prosecco Col Fondo, refermented in the bottle but not disgorged, as the wines are left on their lees. This yeasty residue leaves fine sediment in the bottom of the bottle (fondo in Italian) that imparts more complexity, texture and flavour. They can be served either clear or cloudy. These wines are labelled Conegliano Valdobbiadene Superiore DOCG, or Asolo Superiore DOCG. Col Fondo generally has a lower Frizzante-style 2.5 bars of pressure.
Except for Col Fondo and any Método Classico Prosecco, most Prosecco does not ferment in the bottle. Usually, it should be drunk young, preferably within three years of its vintage. However, high-quality Prosecco may be aged for up to seven years.
The view that Prosecco cannot be aged has been challenged by other experts. A tasting in 2013 of wines produced between 1983 and 2013 demonstrated the longevity of the wines from one of their top producers.
Prosecco has a minimum 10.5-11.5% alcohol by volume, depending on the DOC/DOCG rules. The flavour of Prosecco has been described as aromatic and crisp, bringing to mind yellow apple, pear, white peach, and apricot.. Most Prosecco variants have intense primary aromas and are meant to taste fresh, light and comparatively simple.
Most commonly Prosecco is served unmixed, but it also appears in several mixed drinks. It was the original main ingredient in the Bellini cocktail and in the Spritz cocktail, and it can also be used in other cocktails such as the mimosa. With vodka and lemon sorbet, Prosecco is also an ingredient of the Italian mixed drink Sgroppino.
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- Consorzio di Tutela del Prosecco di Conegliano Valdobbiadene DOCG
- Consorzio Asolo Montello DOCG
- Consorzio di Tutela del Prosecco DOC