Instant milk, or powdered milk, has a surprisingly long shelf life. According to the USDA, it can be stored indefinitely. However, for optimal quality:
- Unopened: An unopened package of instant milk is typically usable for 2 to 10 years after the "best by" date printed on the packaging. Some products, particularly those marketed for long-term storage, may even have a shelf life of 25 years.
- Opened: Once opened, it's best to store the powdered milk in a cool, dry place in an airtight container. This helps prevent moisture absorption, which can lead to clumping and spoilage. Follow the manufacturer's recommendations on the packaging for specific advice on the shelf life of opened powdered milk, but generally, it should be used within a few months for best quality.
Factors affecting shelf life:
- Storage conditions: Heat, light, and moisture can significantly reduce the shelf life of powdered milk.
- Packaging: Proper airtight packaging is crucial for maintaining freshness and preventing contamination.
- Type of Milk: Non-fat dry milk typically lasts longer than whole milk powder due to the fat content in whole milk, which can become rancid over time.
In summary, while powdered milk can technically last indefinitely, its quality will degrade over time. Use unopened packages within 2-10 years of the "best by" date for best results, and consume opened packages within a few months while ensuring proper storage.
