Pantry Storage

• Walnuts store well in a cool, dark pantry for up to six months. Once you open the package, the walnuts can turn rancid quickly at room temperature, so leave them sealed until you are ready to use them. Pantry storage is best only for chopped walnuts you plan to use soon if you want to ensure the best flavor, texture and quality.

Refrigerating Right

• You can prolong the storage life of chopped walnuts by storing them in the refrigerator instead of in the pantry, especially if you aren't using them right away. Sealed packages of chopped walnuts store well for up to a year in a 32- to 35-degree Fahrenheit refrigerator. Once opened, the moisture in the refrigerator shortens the storage life. Repackage opened bags in a tightly sealed container or bag, and use them within a month so that they don't experience moisture damage.

Frozen Assets

• The freezer provides the best option for the longest storage times. Frozen nuts can be stored indefinitely, although they have the best flavor if used within a year. Store the unopened packages in a 0 F freezer. Place them inside the freezer, not in the door, because the opening and closing of the door can cause them to thaw or suffer in quality due to temperature fluctuations.

Extend Shelf Life

• If you harvest or shell your own fresh walnuts for chopping, taking the time to dry them properly helps ensure the longest shelf life. A food dehydrator set to 95 to 105 F provides the best drying temperature. It takes whole nutmeats three to four days to dry completely; then you can chop them as desired. When packaging the walnuts, divide them into serving-size packages and press out any air from the bags before sealing.