Native to East Flanders, Oud Bruin or Flanders Brown is a Belgian-style brown ale with a distinctive sour character. These beers are usually blended and aged in steel vats. As they age, they develop complexity, and aged varieties are generally considered superior.
Most examples are medium-bodied with a color that varies from deep red to brown. They typically have a malty character accompanied by caramel notes, while the flavor is dark and fruity, reminiscent of dark berries, raisins, plums, prunes, and dates.