Wine Glossary
Definition: Eiswein
These are Beerenauslese grapes that have been deliberately allowed to freeze on the vine. The grapes are pressed while still frozen. The ice locks up most of the water, leaving a more concentrated, sweeter juice. Since the frozen grapes must be hand selected and processed immediately in the middle of the night while they are still frozen, production is very limited and expensive.
Source: Univ. of Texas
