gruit

thumb|upright|Beer brewed following a 13th-century recipe using gruit herbs

Gruit (pronounced ; alternatively grut or gruyt) is a herb mixture used for bittering and flavouring beer, popular before the extensive use of hops. The terms gruit and grut ale may also refer to the beverage produced using gruit. Today, however, gruit is a colloquial term applied to a beer produced with hops that is seasoned with gruit-like herbs.