How can you tell if pine nuts are still good? Do they go bad if they are not opened?

  Pine nuts can go bad if they are not stored properly, or if they are old. Here are a few ways to tell if pine nuts are still good: Look for any signs of mold or discoloration on the pine nuts. Smell the pine nuts, they should not have any sour or rancid smell. Taste a pine nut, it should be crunchy and not have any bitter or off-flavor. Check for any signs of insect damage or holes in the packaging, which may indicate the presence of pests. If the Pine nuts are shelled and unopened, they can be stored in an airtight container in a cool, dry place for up to 6 months. If they are opened, they should be consumed within a couple of months and stored in the refrigerator or freezer.