Summer heat can be brutal—not just for us, but for our favourite snacks too. If you’re a fan of walnuts, you know how quickly they can turn rancid when temperatures rise. That unpleasant, bitter taste and odd smell? Yep, that’s your walnuts going bad. But don’t toss them just yet. With the right storage techniques, you can keep walnuts tasting fresh, nutty, and delicious all summer long.
Let’s crack this nut wide open and find out how to store walnuts like a pro!
Why Walnuts Go Bad in the Summer
Walnuts contain a high amount of oil, specifically polyunsaturated fats. While these fats are heart-healthy, they’re also highly sensitive to heat and light. In the summer, the increased humidity and higher temperatures accelerate oxidation, causing the oils to go rancid. Rancid walnuts not only taste awful but also lose their nutritional value.
How to Store Walnuts in the Summer – The Right Way
1. Use Airtight Containers
The first rule of summer walnut storage? Keep out air and moisture. Store shelled or unshelled walnuts in airtight containers—glass jars, vacuum-sealed bags, or BPA-free plastic containers work best. This prevents humidity from creeping in and spoiling your stash.
2. Keep Them Cool
Heat is a walnut’s worst enemy. If you’re planning to eat them within a month, store them in a dark, cool pantry. For longer storage, your fridge or freezer is your best bet. Yes, you can (and should!) freeze walnuts—more on that below.
3. Freeze for Maximum Freshness
To keep walnuts fresh for 6 months or even a year, pop them into the freezer. Place them in airtight freezer bags or containers, and they’ll stay perfectly good without absorbing other odours. Just let them come to room temperature before eating to enjoy the full flavour and crunch.
4. Avoid Storing Near Heat Sources
Never store walnuts near the stove, oven, or any appliances that emit heat. Even if you keep them in a container, the ambient warmth will slowly degrade the oils inside.
5. Store Away from Light
Light, especially sunlight, can also cause walnuts to go bad quickly. Always store walnuts in a dark cabinet or wrap containers in foil if they’re exposed to light.
Pro Tip: Buy Whole Walnuts If Possible
Whole walnuts last longer than shelled ones. The shell acts as a natural barrier against oxygen and moisture. If you’re not in a hurry, go for unshelled walnuts and crack them open as needed.
Final Thoughts
Don’t let summer spoil your snack game. With the right storage hacks, you can enjoy walnuts that are as fresh in July as they were in January. Whether it’s a handful tossed into your salad or a boost of energy on the go, properly stored walnuts are always a win.
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