The Vancouver Indy Coffee Scene

An excessively sharp, biting and unpleasant flavour (For example, vinegar or acetic acid). Soury flavours are sometimes associated with the aroma of fermented coffee. A sour taste is caused by overripe or already fermenting cherries, or by improper fermentation where yeasts and alcohol form vinegar-like acids. Soury flavours are often confused with acidity, which is the slightly tangy sensation associated with light-roasted coffee flavours.