Unopened packaged granola bars can generally last anywhere from 6 to 8 months. They should be stored in a cool, dry area of your pantry.  While there is likely a “Best Buy” or “Best if Used By” date on the package, this indicates when granola bars are at their peak quality.  They are still safe to eat after this date, but their texture or flavor may change. Check the granola bar for off odors or appearance to determine if it should be thrown away. Bars made from almond flour have a shorter shelf life of about 3 months due to almonds’ tendency to go rancid.