The Rodenbach Grand Cru is the archetypal Flanders red-brown beer. Each of these beers is a unique blend, but they all share a brewing process characteristic of the area surrounding Roeselare and Kortrijk.
The typical sweet and sour taste of a Rodenbach Grand Cru is produced by a two stage fermentation process called mixed fermentation, involving top-fermentation and bacterial fermentation using lactic acid bacteria. The Rodenbach Grand Cru matures in oak foeders, or barrels, over a period of two years, giving the beer a unique, complex fruitiness that is reminiscent of wine.
Rodenbach, the mother beer, is usually one-quarter mature beer to three-quarters young beer. When it comes to Rodenbach Grand Cru, the blend is two-thirds mature beer with one-third of a young brew added.