Expiration & Storage Tips
When does mirin expire?
When unopened and stored at room temperature in a dark and cool pantry, mirin can last indefinitely, although its quality begins to degrade after about two years. If you've opened your bottle of mirin, it’ll stay good for about three months kept in a cool, dark place like a pantry. For optimal flavor and quality, it's best to use the mirin within one year. Once opened, it’s ideal to refrigerate mirin as it can extend its shelf life to about 6 months to a year. Freezing mirin is not common, and is not recommended as it can affect the taste and quality of the product.
How do you tell if mirin is bad?
To tell if mirin is off, you need to smell it. If it has a strong, unpleasant odor that doesn’t coincide with its typical aroma, or it has developed an off-taste, it's probably spoilt. Additionally, if there are visible signs of mold inside the bottle, you should discard it immediately. While mirin may darken over time, this isn’t necessarily an indication that it has gone bad, but rather a natural part of the aging process.
Tips for storing mirin to extend shelf life
• Keep your mirin in a cool, dark place, like a pantry or a cupboard, to prolong its shelf life.
• Always ensure the bottle is sealed properly - oxygen can speed up the degradation process.
• If keeping it in the refrigerator post-opening, ensure it's tightly sealed to prevent absorption of other food odors.
• Don't transfer the mirin into another container - the original bottle is designed to keep the product fresh longer.