Sweet Wines and Fortified: Sauternes, Port, Sherry, and Beyond
Sweet and fortified wines occupy a paradoxical position in the wine world: revered by collectors, slightly neglected by a generation trained to think of sweetness as unfashionable. The category contains some of the longest-lived and most complex wines on Earth — a 1945 Château d'Yquem, a 1963 Quinta do Noval Nacional, a 1900 Madeira — and some of the most distinctive winemaking traditions. Getting comfortable with these wines requires understanding how their sweetness or strength is achieved, and why.
Botrytis: The Noble Rot
Botrytis cinerea, the fungus responsible for grey rot in wet conditions, becomes "noble rot" (pourriture noble, Edelfäule, aszúsodás) under specific autumn conditions of morning fog and warm dry afternoons. The fungus punctures the grape skin, dehydrating the berry and dramatically concentrating sugars, glycerol, and acidity while transforming certain compounds into honeyed, saffron, and ginger aromatic notes. A botrytis-affected vineyard smells unmistakably of mushroom and overripe apricot at harvest.
Sauternes AOC, on the left bank of the Garonne in Bordeaux, is the world's most prestigious botrytis appellation. Semillon (dominant), Sauvignon Blanc, and Muscadelle are harvested in multiple passes (tries) through the vineyard as botrytis develops unevenly across the estate. Château d'Yquem, the appellation's only Premier Cru Supérieur, typically harvests each vine individually over several weeks; one vine produces roughly a single glass of wine. Yquem is produced only in declared years (about two in every three), and the 2001 vintage is considered among the finest of the modern era alongside the legendary 1967. Château Climens (Barsac) and Château Rieussec are the leading Premier Crus.
Tokaji Aszú from Hungary is Sauternes' greatest peer. Furmint grapes affected by botrytis (aszú berries) are harvested separately, formed into a paste, and added in measured quantities (puttonyos — baskets, historically) to a base wine, then macerated and fermented. The aszú designation now requires a minimum of 120 grams of residual sugar per litre, with the rare Eszencia (free-run juice from botrytised berries, barely fermented) reaching 450 g/L or above. Royal Tokaji Wine Company and Disznókő are the leading contemporary producers. The 1993 Tokaji Aszú 6 Puttonyos from István Szepsy — the winemaker most responsible for the post-Communist renaissance — is a reference modern Tokaji.
German Beerenauslese (BA) and Trockenbeerenauslese (TBA) are the highest rungs of the Prädikatswein system, requiring individually selected (BA) or individually selected and shrivelled-to-raisin (TBA) grapes. Egon Müller's Scharzhofberger TBA from the Saar is among the rarest and most expensive wines produced anywhere. Both styles share botrytis's signature honeyed, petrol-accented concentration.
Late-Harvest Wines
Late-harvest wines achieve sweetness without botrytis by leaving grapes on the vine past normal ripeness, allowing further sugar concentration through evaporation. German Spätlese and Auslese designations indicate selective harvesting of riper clusters (Spätlese) or individually selected bunches (Auslese), though neither requires botrytis. In Alsace, Vendange Tardive (late harvest) and Sélection de Grains Nobles (botrytis-required individual selection) are the two tiers, applied to Riesling, Gewurztraminer, Pinot Gris, and Muscat. Trimbach's Vendange Tardive Riesling and Zind-Humbrecht's Clos Windsbuhl Vendange Tardive Pinot Gris are among the finest expressions.
Passito: Dried Grape Wines
Passito wines concentrate sugars by air-drying harvested grapes — on racks (graticci), straw mats, or hung in ventilated lofts — before pressing. The result is partial raisining, concentrating sugars, phenolics, and flavour compounds. Vin Santo (Tuscany) is made from Trebbiano and Malvasia dried until January, then fermented slowly in small sealed barrels (caratelli) for at least three years, producing an oxidative, nutty, caramel-inflected wine. Avignonesi's Vin Santo di Montepulciano and Isole e Olena's Vin Santo del Chianti Classico are benchmark producers.
Recioto della Valpolicella and Recioto di Soave are the Veneto's sweet passito reds and whites, made from dried Corvina, Rondinella, and Molinara grapes. The difference between Recioto della Valpolicella (sweet) and Amarone (dry) is simply whether fermentation runs to completion or is arrested while residual sugar remains.
Fortified Wines: Port, Sherry, Madeira, Marsala
Port is made by adding grape spirit (aguardente, at 77% ABV) to a fermenting red wine from the Douro Valley when residual sugar reaches the desired level. Fermentation stops; the wine retains natural grape sweetness; the final wine is roughly 20% ABV. Tawny Port ages in small wooden pipes under mild oxidative conditions, developing nutty, dried-fruit, and orange-peel character; Colheita Tawnies are dated single-vintage expressions. Vintage Port ages in bottle, developing profound complexity over decades — the 1963, 1970, 1977, 1994, and 2011 declared vintages are the most celebrated. Quinta do Noval's Nacional, made from ungrafted pre-phylloxera vines, is one of the world's rarest and most extraordinary wines.
Sherry from Jerez de la Frontera in Andalucía is Spain's great fortified wine, its diversity spanning from bone-dry Fino and Manzanilla (with living flor yeast protection) through Amontillado and Oloroso to the luscious, near-black Pedro Ximénez — made from sun-dried PX grapes so sweet they barely ferment. González Byass' Tío Pepe Fino is the world's best-selling Sherry; their Noé Pedro Ximénez and the Apostoles Palo Cortado are the prestige expressions. Equipo Navazos produces single-barrel Sherries of extraordinary precision, while Hidalgo La Gitana's Manzanilla is the benchmark for the lighter, saline Sanlúcar style.
Madeira wine, from the Portuguese island of the same name, is unique in achieving its characteristic oxidative, rancio quality through deliberate heating (estufagem). Cheap Madeira is heated in tanks; the finest Madeiras (Verdelho, Bual, Malmsey, Sercial) age naturally in old barrels for decades or centuries. Madeira is effectively indestructible once fortified — bottles from the 18th century are still occasionally sound and pleasurable. Blandy's and Henriques & Henriques are the most accessible quality producers; the Madeira Wine Company (which owns Blandy's, Cossart Gordon, and other labels) is the commercial backbone of the island's wine trade.
Marsala DOC from western Sicily, Mavrodaphne from Patras in Greece, and Montilla-Moriles in Córdoba (where Pedro Ximénez achieves extraordinary ripeness without Jerez's flor system) round out the major fortified traditions.
Ice Wine: Inniskillin and the Niagara Benchmark
Eiswein in Germany and Austria is made from grapes left on the vine until they freeze naturally, typically at -8°C or below. Pressing frozen grapes expels pure concentrated juice while the water remains as ice crystals. The result is intensely sweet, piercingly acidic, and extraordinarily concentrated — produced in tiny quantities at significant risk to the entire harvest.
Canada's Inniskillin, in the Niagara Peninsula of Ontario, put New World ice wine on the international map when Donald Ziraldo and Karl Kaiser's 1989 Vidal Ice Wine won a Grand Prix at Vinexpo in 1991. Canadian ice wine, where winters are reliably cold enough to guarantee freezing conditions, has become a significant export category; Inniskillin's Vidal and Riesling Ice Wines remain the benchmark expressions.
Find Sweet and Fortified Producers on the Map
Producers across every style discussed here — from Sauternes châteaux to Douro Port quintas to Jerez sherry bodegas to Niagara ice wine estates — are plotted on the winery map. Use the region filter to find producers near a destination you are planning to visit, or explore the full global range of sweet and fortified wine traditions in one place.