How to Safely Store Walnuts

Use walnuts immediately or store in an airtight container.

The goal in storage safety when it comes to walnuts is to avoid rancidity. Exposure to warm temperatures can cause walnut rancidity; the heat causes the walnut fat to change which in turn causes odors and unpleasant flavors. Fresh walnuts should smell sweet and taste nutty. If they have a chemical taste or smell -- similar to paint thinner -- throw them out.

Things You'll Need

• Airtight container or resealable plastic bag

Instructions

1. Keep the walnuts in their original packaging, if sealed.

2. Place the walnuts in an airtight container after opening. Use a container with a lid or a resealable plastic bag.

3. Squeeze out the air in the resealable bag when closing it.

4. Place the walnuts in the refrigerator if you will use them within a month. If you need to store them for longer than a month, place them in the freezer. Walnuts in the shell are fine to store in a pantry or another cool, dry place for up to three months before placing in the freezer or refrigerator.

Tips & Warnings

• To store walnuts at room temperature for up to two weeks and ensure safety, bake them first at 215 degrees Fahrenheit for 10 to 15 minutes. Place walnuts away from strong smelling foods; walnuts can absorb the odors from such foods as fish and onions. Do not chop walnuts until you are ready to use them to maintain the freshest flavor.

References

• California Walnuts: How to Store Walnuts
• Betty Crocker: Walnuts
• University of Minnesota Extension; Harvesting Black Walnuts; Oct. 1998