Prosecco hails from Northeast Italy, though its heartland is a small region in the Veneto called Conegliano Valdobbiadene. While consumers often equate it with widely available commercial-quality fizz, access to Italy\u2019s finest sparkling wines is rising. Many retailers now sell Prosecco for every occasion, from party-ready bottlings to companions for fine dining.\r\n\r\nProduction techniques continue to improve, and the appetite for experimentation grows. The result is better bubbles and diminished sugar levels that showcase terroir, quality and style. Indeed, the world of Prosecco holds much to explore for the curious wine lover.\r\n\r\n\r\nThe Grape: Glera\r\nIn the past, the grape used to make Prosecco was called both Prosecco and Glera. The thin-skinned green grape has been grown in the Veneto and Friuli regions of northern Italy for hundreds of years.\r\n\r\nBut in 2009, an increased number of New World plantings led Italian authorities to seek legal protection for the name \u201cProsecco\u201d by rechristening the variety as \u201cGlera.\u201d It was a move akin to how the French protect the name Champagne as a place of origin. That was also the year when Conegliano Valdobbiadene\u2019s appellation became Italy\u2019s 44th Denominazione di Origine Controllata e Garantita (DOCG).\r\n\r\nIn Italy, Prosecco refers solely to wines made within three specific designated appellations produced with at least 85% Glera. However, producers abroad have been known to also use the term for their own bottlings, sparking legal challenges.\r\n\r\nGlera has a tendency toward high yields, and the greater the yield, the more neutral the resulting wine becomes.\r\n\r\nThe grape\u2019s moderately high acidity makes it a shoo-in for sparkling wine. It gives a lovely perfume of melons, peaches, pears and white flowers. The resulting wines are typically light to medium-bodied. Depending on the producer\u2019s style and amount of residual sugar, alcohol levels can range from 8.5% to 12.5% for fully dry wines.\r\n\r\n\r\nThe difference between Prosecco and Champagne\r\nA key difference between Prosecco and other sparkling wines, like Champagne, is how the bubbles are made. There are several ways to get carbon dioxide (CO2) into a bottle of wine.\r\n\r\nThe most expensive and well-known technique is called the traditional method. This is how the Champenois produce their iconic sparkling wine. The winemaker fills a bottle with still, dry wine, then adds yeast and sugar before it\u2019s sealed with a crown cap. As the yeast consumes the sugar, it gives off CO2 as a byproduct.\r\n\r\nThe traditional method requires that the second fermentation occurs inside the bottle you buy off the retail shelf. However, this method also changes the wine. It adds complexity, texture and flavors like brioche and toast, especially as it ages.\r\n\r\n\r\n\r\nBut not all wines should be handled this way. Some are better youthful and bright, which is why Prosecco undergoes a different process.\r\n\r\nFor most Prosecco, the second fermentation happens in a large tank. There are several names for the process: Charmat-Martinotti, Italian method, tank method, cuve close in French, or autoclave in Italian. It\u2019s cheaper, faster and less labor intensive than the traditional method.\r\n\r\nBase wine is added to a pressure tank, then a second fermentation is triggered by adding yeast and sugar. Cooling the wine when the desired atmospheres of pressure have been reached stops the rapid fermentation. This method retains Glera\u2019s perfume and freshness.\r\n\r\n\r\nProsecco\u2019s DOC and DOCG Regions\r\nYou\u2019ve probably seen the letters DOC and DOCG on a few of your Italian wine labels. These acronyms, Denominazione d\u2019Origine Controllata (DOC) and Denominazione d\u2019Origine Controllata e Garantita (DOCG), represent legal quality categories established with the purpose of identifying and rewarding Italy\u2019s great and best wines, respectively.\r\n\r\nAt the base of the quality pyramid is the sizeable Prosecco DOC, which covers nine provinces in the Veneto and Friuli-Venezia Giulia. If wines are harvested, made and bottled within the provinces of Treviso and Trieste, they can be labeled Prosecco DOC Treviso or Prosecco DOC Trieste. All the Prosecco DOCs allow for more production when compared to the stringent DOCGs in the area.\r\n\r\nYou\u2019ve probably seen the letters DOC and DOCG on a few of your Italian wine labels. These acronyms represent legal quality categories established with the purpose of identifying and rewarding Italy\u2019s great and best wines, respectively.\r\n\r\nAs the pyramid narrows, the best wines in terms of character and refinement come from the Asolo Prosecco DOCG and Conegliano Valdobbiadene Prosecco Superiore DOCG. The latter also encompasses the more precise denominations of Prosecco Superiore DOCG, Superiore Rive DOCG and Valdobbiadene Superiore di Cartizze DOCG.\r\n\r\nWines labeled Conegliano Valdobbiadene Superiore Prosecco DOCG are made exclusively on the hills between the two towns of Conegliano and Valdobbiadene in the Treviso province. There, as in much of Europe, viticulture traces back to the Romans. References to the local wine and its importance to daily life are found in stone memorials, written texts and painted frescoes.\r\n\r\nConegliano has long been considered a cultural capital. Prosecco owes its origin to the city\u2019s\u2014 and Italy\u2019s\u2014first school of winemaking, The School of Oenology. Valdobbiadene lies at the heart of the production area, ensconced in lush vineyards.\r\n\r\n\r\n\r\nSuperiore Rive DOCG refers to wines produced from one of the 43 designated communes or vineyard sites. These are generally the steepest vineyards and are considered the best, offering unique expressions of the different soil types and microclimates. Grapes are picked by hand, and the vintage is always added to the label.\r\n\r\nValdobbiadene Superiore di Cartizze DOCG sits at the top, the crown jewel or grand cru of Prosecco\u2019s ambition. Wines come from a subzone in Valdobbiadene called Cartizze, which has carried its own set of regulations since 1969. They are the highest priced, as top producers can fetch up to $75 per bottle.\r\n\r\nWhile these designation names are overwhelming and verbose, just remember the following: Prosecco DOC is light and quaffable; Superiore DOCGs are a cut above, with terroir-driven Rive followed by Cartizze at the top.\r\n\r\n\r\nProsecco\u2019s Effervescence and Sweetness\r\nThough some still wine is made, Prosecco is typically frizzante (fizzy) or spumante (fully sparkling). Frizzante wines have lower atmospheric pressure (1\u20132.5 bars) and often cost less than Prosecco Spumante (5 bars), which seek to be an affordable alternative to Champagne.\r\n\r\nAs far as sweetness, Prosecco DOC comes in four levels. From driest to sweetest: Brut, Extra Dry, Dry and Demi-Sec. Superiore DOCG, however, only comes in the first three.\r\n\r\nOne more style to note is Prosecco Col Fondo. For lovers of p\u00e9tillant naturel (p\u00e9t-nat), natural-leaning and minimal intervention wines, this frizzante style offers a different take on Prosecco.\r\n\r\nWith Col Fondo, producers bottle-ferment Glera and other indigenous varieties, instead of tank ferment, then eschew disgorgement. This leaves dead yeast in the bottle (lees), which creates sediment and cloudiness. In fact, Col Fondo means \u201cwith the bottom.\u201d The wines ferment to full dryness and can age a few years. Col Fondos are distinct, idiosyncratic and a darling of sommeliers that look for unusual wines.\r\nDoes all Prosecco come from Italy?\r\nWhile Italian Prosecco has its roots in ancient times, the grape has long been grown in Slovenia, and more recently, Australia\u2019s King Valley. The latter saw an influx of Italian settlers and is known for other Italian varieties like Sangiovese and Nebbiolo.\r\n\r\nCurrently, Australian Prosecco is enjoying success, and its producers battle to continue use of the name for both the grape and the wine. These producers argue that Prosecco is the long-established variety name, and therefore doesn\u2019t deserve protection. The dispute has created rancor during trade talks with the European Union.\r\n\r\n\r\nFive Proseccos to Try\r\nCa' dei Zago 2015 Dosaggio Zero Metodo Classico (Prosecco di Valdobbiadene); $25, 93 points. This elegant, savory sparkler opens with inviting aromas of dried wildflower, mature orchard fruit and a yeasty whiff of bread dough. On the creamy palate, a soft mousse accompanies yellow apple, white peach and citrus zest alongside accents of dried herb and a hint of ginger. Ethica Wines. Editors\u2019 Choice. \u2013Kerin O'Keefe\r\n\r\nCase Paolin NV Col Fondo (Asolo Prosecco Superiore); $25, 92 points. Slightly fizzy and incredibly fragrant, this radiant sparkler boasts heady scents of honeysuckle, lemon blossom and white stone fruit. The crisp dry palate delivers green apple, Bartlett pear, citrus zest and a saline note alongside vibrant acidity and lightly foaming bubbles. Fermented in the bottle, it has some sediment at the bottom that adds flavor and complexity. T. Elenteny Imports. Editors\u2019 Choice. \u2013K.O.\r\n\r\nAlbino Armani NV Casa Belfi Col Fondo (Prosecco); $20, 91 points. Yeasty aromas of bread dough, toasted hazelnut, pressed wild flower and an earthy whiff of brimstone follow over to the crisp palate along with citrus and yellow apple. Made with grapes cultivated according to biodynamic farming practices and fermented with wild yeasts, it's a fascinating expression of Prosecco. Mise. \u2013K.O.\r\n\r\nAlth\u00e9a NV Dry (Prosecco Superiore di Cartizze); $24, 90 points. Citrus blossom, honeysuckle and acacia honey aromas mingle together on this off-dry silky sparkler. It's bright, creamy and refined, doling out sweet white peach, glazed almond and candied lemon peel alongside a lively polished perlage. \u2013K.O.\r\n\r\nMionetto NV Luxury Dry (Prosecco Superiore di Cartizze); $35, 90 points. Aromas of ripe pear and green apple follow over to the rich creamy palate along with notes of nectarine and glazed lemon drop. Bright acidity provides freshness while a soft mousse lends finesse. Mionetto USA. \u2013K.O.