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Ancient brewery reveals Iron Age beer recipe

A researcher studying a brewery found in an Iron Age Celtic settlement believes he has worked out the recipe used to brew beer way back in 500 B.C.

Dr Hans-Peter Stika, an archaeobotanist from the University of Hohenheim in Stuttgart, Germany has been studying the remains of an early Iron Age Celtic settlement at Eberdingen-Hochdorf dating from around 500 BC, in particular the six oblong ditches dug for the process of making barley malt for beer. The excavated ditches contained thousands of grains of charred barley, which Dr Stika believes are the remains of the production of high quality barley malt needed for making beer.

Dr Stika reproduced several methods for making beer that the Celtic peoples in the Iron Age might have used, and concluded that the ditches were used to soak barley grains until they sprouted. Fires were then lit at either end of the ditch to slowly dry the sprouted grains and give the malt produced a dark color and smoky flavor. The slow drying would have stimulated the growth of bacteria that caused the release of lactic acid, which added sourness to the end product.

The excavations at Eberdingen-Hochdorf have also yielded seeds of henbane, a plant also called stinking nightshade and known to increase the intoxicating effect. Dr Stika thinks the beer probably also contained mugwort and/or carrot seeds, since these were known to have been added to beer in medieval times. The spices would have given the brew a much different flavor to the hop flavor known today. The use of hops is not known before 800 AD.

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