Jacobins Gueuze 25cl Jacobins Gueuze has an alcohol content of 5,5%. The basic ingredient of our Jacobins Gueuze is wort made of wheat and malted barley. After it has cooled down in the cooling vessel, the wort spontaneously ferments in big oak barrels. During this fermentation process the flavour evolves considerably. 18 to 24 months later we finally obtain the lambic beer.