- How long does peppermint liqueur last? The answer to that question is a matter of quality, not safety, assuming proper storage conditions - when properly stored, a bottle of peppermint liqueur has an indefinite shelf life, even after it has been opened.
To maximize the shelf life of peppermint liqueur for quality purposes, store in a cool dry area away from direct heat or sunlight; keep tightly closed when not in use.
Once a bottle of peppermint liqueur is opened, the contents may begin to evaporate slowly and some flavor may be lost over time, but the peppermint liqueur will remain safe to consume if it has been stored properly.
How to tell if peppermint liqueur has gone bad? The shelf life of peppermint liqueur is indefinite, but if peppermint liqueur 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