Gose is a warm fermented beer that originated in Goslar, Germany. It is usually brewed with at least 50% of the grain bill being malted wheat. Dominant flavours in gose include a lemon sourness, a herbal characteristic, and a strong saltiness (the result of either local water sources or added salt). Gose beers typically do not have prominent hop bitterness, flavours, or aroma. The beers typically have a moderate alcohol content of 4 to 5% ABV.
Because of the use of coriander and salt, gose does not comply with the Reinheitsgebot - it is allowed an exemption on the grounds of being a regional specialty. It acquires its characteristic sourness through inoculation with lactobacillus bacteria.
Gose was first brewed in the early 13th century in the town of Goslar, from which its name derives. It became so popular in Leipzig that local breweries copied the style. By the end of the 1800s, it was considered to be local to Leipzig and there were numerous Gosenschänken (gose taverns) in the city.
Originally, gose was spontaneously fermented. A description in 1740 stated "Die Gose stellt sich selber ohne Zutuung Hefe oder Gest" ("Gose ferments itself without the addition of yeast"). Sometime in the 1880s, brewers were achieving the same effect by using a combination of top-fermenting yeast and lactic acid bacteria.
Gose was delivered, still actively fermenting, in casks to the Schänken. Casks were stored in the cellar with the tap bung closed but the shive hole left open which allows some gas to escape, so that the CO₂ gas from still-active yeast could escape. When fermentation had slowed to a point where no gas was emerging, the gose was ready to bottle. The barrel was emptied into a tank, whence it was filled into traditional long-necked bottles. These were not closed with a cap or cork, but with a plug of yeast (flor) which naturally rose up the neck as the secondary fermentation continued.
By the outbreak of World War II, the Rittergutsbrauerei Döllnitz, between Merseburg and Halle, was the last brewery producing gose. When it was nationalised and closed in 1945, gose disappeared temporarily. In 1949, the tiny Friedrich Wurzler Brauerei opened at Leipzig; Friedrich Wurzler had worked at the Döllnitz brewery and had known the techniques for brewing gose. Before his death in the late 1950s, Wurzler passed the recipe to his stepson, Guido Pfnister. Brewing of gose continued in the small private brewery, though there appears to have been little demand. By the 1960s there were no more than a couple of pubs in Leipzig and possibly one in Halle that were still selling it. When Pfnister died in 1966 the brewery closed and gose production again ceased.
In the 1980s, Lothar Goldhahn, then restoring the former gosenschenke "Ohne Bedenken", decided that it was suitable that the revived pub should sell gose. After querying drinkers to ascertain its precise characteristics, Goldhahn searched for a brewery to produce it. No local brewery was willing to make such an odd beer until the Schultheiss Berliner-Weisse-Brauerei on Schönhauser Allee in East Berlin agreed. The first test brews were made in 1985 and production started in 1986.
After briefly disappearing again in 1988, gose has again found popularity. In and around Leipzig, there are now several specialised gose breweries again. In addition, the style continues to be brewed outside Germany, most notably in the United States.
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