These are complex dark beers most closely associated with the town of Oudenaarde in Flanders. The authentic examples are medium- to full-bodied beers that are influenced by a number of factors: high bicarbonate in the brewing water to give a frothy texture; a complex mix of yeasts and malts; blending of aged beers; and aging in bottle before release. In the best examples, the flavor profile is reminiscent of olives, raisins and brown spices, and could be described as “sweet and sour.” These beers are not hop-accented and are of low bitterness.