Ice Wine

Ice wine, otherwise called as Eiswein in German, is a desert wine. It is produced from grapes that have been frozen. It is an unusually concentrated and very sweet wine as the sugar and other dissolved solids do not freeze, but the water does. The effect is comparable to the freeze distillation that was traditionally used to make applejack and similar beverages, but in the case of ice wines, the freezing happens before the fermentation, not afterwards.

Though, the ice wine is also made in Canada as well as in United States, Australia, Slovenia and Czech Republic, the most famous and expensive wine is produced in German that is called as Eisweine. In German classification, the Eiswein wine is classified as QmP. Canada has become the largest ice wine producer in the world as it unusually consistent freezes in winter.

In general, ice wines require a hard frost to occur sometimes after the grapes are ripe, which means that the grapes my hang on the vine for several months following normal harvest.
It has been a log aruguement that whether ice wine improves with age or is meant to be drunk young. Those who support aging claim that ice wine's very high sugar level (which is often much higher than Sauternes) and high acidity preserve the content for many years after bottling. Those who disagree contend that as ice wine ages it loses its distinctive acidity, fruitiness, aroma, and freshness.