The most popular non-alcoholic drink in ancient Rome, which was highly valued by both citizens and legionaries. It was a vinegar water made from diluted vinegar (wine vinegar). The fine acidic flavour had a refreshing effect and also masked the taste or smell of poor quality water. In addition to the posca produced from wine vinegar, sour wine or iora(marc wine) was also used to make it. Wine vinegar was added for this purpose. The ancient cookery book by the gourmet Marcus Gavius Apicius contains a recipe for sour bread porridge that mentions posca as an ingredient.
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Thorsten Rahn
Restaurantleiter, Sommelier, Weindozent und Autor; Dresden