Umqombothi

Umqombothi , is a South African traditional beer made from maize (corn), maize malt, sorghum malt, yeast and water. It is very rich in vitamin B. The beer has a rather low alcohol content (usually less than 3%) and is known to have a heavy and distinctly sour aroma. In appearance, the beer is opaque and light tan. It has a thick, creamy, and gritty consistency (from the maize). Umqombothi is cheaper than commercial lager beers brewed from barley and flavoured with hop flowers. Umqombothi is brewed following traditional customs, and these vary slightly between regions. The recipe is often passed down through generations. The beer is traditionally prepared over a fire outside of the house. It then passively cools to ambient temperatures outside the house.

Source: Wikipedia