The Faust Doppelbock beer is brewed once a year. Each vintage is unique, which is due to the natural raw materials. A high proportion of dark malt is responsible for the malty-caramel taste. The vintage bocks from the Brauhaus Faust are stored in the swing-top bottles in the rock cellar of the Faust Treasure Chapel immediately after the limited bottling, where they mature into a real rarity.