Hertog Jan Grand Prestige is our crown jewel; the pride of the Hertog Jan brewery. For this dark and heavy Hertog Jan beer the special Hertog Jan malt is used: a special mix of four kinds of malt. This gives a rich, full flavor in which sweet and bitter can be distinguished. Hertog Jan Grand Prestige is one of the few beers that can be aged, the taste will become richer with the years. After two years of aging, the taste will start to change. After many years the taste will be similair to a Port wine.