How long does Powdered milk last after opening?

Once opened, Powdered milk keeps about 3 months in the pantry. Unopened, it keeps about 3–5 years.

Source: USDA FoodKeeper v128 · Category: Dairy & eggs

How long Powdered milk keeps

Only situations with a published figure are listed. A blank isn't “forever” — it means no reliable number is published for it.

Storage

• Store at: Cool, dry pantry, sealed — refrigerating after opening is optional and mainly preserves quality
• Refrigerate after opening: Optional — mainly for quality, not safety
• Tip: 3 - 5 year timetable based on cool temperatures, dark storage. May spoil as quickly as 3 months in hot temperatures.

How to tell if Powdered milk has gone bad

• Sour or off smell
• Mould or fuzzy spots
• Curdled, slimy, lumpy, or separated texture
• Yellowing or other discoloration

These are the general spoilage signs for dairy & eggs — never taste something to test it. When in doubt, throw it out.

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