The shelf life of powdered milk can vary depending on the brand and specific packaging, but generally, it can stay good for about 12 to 18 months in the pantry if it is unopened, airtight, and not refrigerated. However, it's essential to check the expiration date printed on the packaging for the most accurate information.
Keep in mind that the storage conditions can also affect the longevity of powdered milk. High temperatures and humidity can cause the milk powder to degrade more quickly, so it's best to store it in a cool, dry place away from direct sunlight.
Once you open the powdered milk, its shelf life will decrease significantly. It is recommended to use it within a few weeks or follow the guidelines provided by the manufacturer for the best quality. If you notice any changes in color, odor, or texture, it's better to discard the powdered milk, as it might have gone bad.