Checking the Harvest Date Unlike milk or bread, olive oil does not always carry a traditional expiration date. Few ingredients in a kitchen are as revered and yet as misunderstood as olive oil.
Understanding When Olive Oil Loses Its Flavor and Aroma
Instead, look for a "best by" date or, more importantly, a harvest or bottling date. If your bottle lacks this critical date, check the packaging for a lot number that you can trace back to the producer.
Rely on Your Sense of Smell Your nose is the most immediate and reliable tool for detecting spoilage. However, if the date is faded or indicates the oil is several years old, it is safest to assume the flavor profile has deteriorated.
Recognizing When Olive Oil Loses Its Distinctive Flavor and Aroma
If the aroma is sharp, reminiscent of old paint, crayons, or stale nuts, you are likely dealing with rancid oil. Pour a small amount into a glass and swirl it gently.
More About How to tell if olive oil is bad
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