How to Taste – Ageing Off Flavours
During storage the chemical composition of beer may be altered, consequently changing both aroma and taste.
Generally beer ageing is considered negative for the overall flavour of the drink. Flavours found in beers due to ageing are not always considered to be off flavours, and can sometimes be considered as a positive flavour note for some particular brands, however when these flavours are found in high concentrations they impart a stale like, undesirable taste to the beer.
Examples of ageing off flavours are:
Tasting Acetaldehyde, Almond, Spicy and Vanilla
Cover the beer with your and and swirl the glass to release the aroma. Remove your hand and take a long single sniff.
Tasting Catty, Leathery, Lightstruck and Papery
Swirl the glass to release the aroma. Take short sniffs while holding the beer near the nose.