Dessert wine

Dessert wines, sometimes called pudding wines in the United Kingdom, are sweet wines typically served with dessert.

There is no simple definition of a dessert wine. In the UK, a dessert wine is considered to be any sweet wine drunk with a meal, as opposed to the white fortified wines (fino and amontillado sherry) drunk before the meal and the red fortified wines (port and madeira) drunk after it. Thus, most fortified wines are regarded as distinct from dessert wines, but some of the less-strong fortified white wines, such as Pedro Ximénez sherry and Muscat de Beaumes-de-Venise, are regarded as honorary dessert wines. In the United States, by contrast, a dessert wine is legally defined as any wine over 14% alcohol by volume, which includes all fortified wines—and is taxed more highly as a result. This dates back to when the US wine industry only made dessert wines by fortification, but such a classification is outdated now that modern yeast and viticulture can produce dry wines over 15% without fortification (and German dessert wines can contain half that amount of alcohol).

Makers of dessert wines want to produce a wine containing high levels of both sugar and alcohol. Since all winemaking creates alcohol from fermentation of sugars they are typically traded off. However, there are many ways to increase relative sugar levels in the final wine:

In the absence of other techniques, makers of dessert wine have to produce their sugar in the vineyard. Some grape varieties, such as Muscat, Ortega and Huxelrebe, naturally produce much more sugar than others. Environmental conditions have a big effect on ultimate sugar levels; the vigneron can help by leaving the grapes on the vine until they are fully ripe, and by green harvesting and pruning to expose the young grapes to the sun. Green harvesting reduces the number of bunches on a vine early in the summer, so that the sugar production of the leaves is divided between fewer bunches. While the vigneron cannot control the sun, a sunny year regulates sugar levels. The semi-sweet Auslese wines in the German wine classification are probably the best example of this approach; most modern winemakers perceive that their customers want either fully dry or 'properly' sweet dessert wines, so 'leave it to nature' is currently out of fashion. But most of the Muscats of ancient times were probably made this way, including the famous Constantia of South Africa.

Honey was added to wine in Roman times, for sweetness and to increase the final strength of the wine. Today sugar is usually added in order to boost the alcohol levels of flabby, unripe wines rather than for sweetness, although a degree of chaptalization is permitted in the wines of many countries. German wines must declare whether they are 'natural' or not; in any case, chaptalization is banned from the top tiers of German wines.

The 'reserve of sweetness' is a German technique in which unfermented must (grape juice) is added to the wine after fermentation. This increases the sweetness of the final wine and dilutes the alcohol somewhat—in Germany the final wine can contain no more than 15% Süssreserve by volume. Süssreserve allows winemakers to fully ferment the wine without having to worry about stopping fermentation before all the sugar has gone. Since sulphites are used to stop fermentation, this technique reduces the usage of sulphites. Süssreserve is used by other makers of German-style wines, particularly in New Zealand.

The main fortified wines drunk with dessert are sweet Montilla-Moriles & sherry, particularly Pedro Ximénez, and vins doux naturels. The Pedro Ximenez dessert wine is unique because it is a raisin wine that is then fortified and aged in a solera system like other sweet wine from Andalucia. Other sweet sherries (is a blend wine) such as Bristol Cream may also be drunk as dessert wine.

The production of vins doux naturels was perfected by Arnaud de Villeneuve at the University of Montpellier in the 13th century. They are now quite common in the Languedoc-Roussillon of southwest France. As the names suggest, Muscat de Beaumes-de-Venise, Muscat de Rivesaltes, Muscat de Frontignan, Muscat de Lunel, Muscat de Mireval and Muscat de St-Jean Minervois are all made from the white Muscat grape, whilst Banyuls and Maury are made from red Grenache. Regardless of the grape, fermentation is stopped with up to 10% of 95% grape spirit. The Muscats are made in a somewhat oxidised style, the Grenaches less so.