- How long does Madeira last once opened? The answer to that question depends to a large extent on storage conditions – store opened Madeira in a cool, dark area and keep bottle tightly closed when not in use.
How long does opened Madeira last at room temperature? An opened bottle of Madeira will usually maintain best quality for about 3 years, although it will stay safe indefinitely if properly stored; fine Madeira can retain top quality for many years, even after opening.
How to tell if an opened bottle of Madeira has gone bad? The best way is to smell and look at the Madeira: if Madeira develops an off odor, flavor or appearance, it should be discarded for quality purposes.
Sources: For details about data sources used for food storage information, please click here