Why are some olive oils very spicy, some buttery? More interested in why so spicy sometimes. I never thought of an olive as being something that’s spicy. Thanks!
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The olive oils you describe as “spicy” are likely rancid. With oil, rancidity is just about flavor, not about foodborne illness. Check out [this ](https://www.cooksillustrated.com/articles/2978-how-to-tell-if-an-oil-is-rancid)article to learn how to tell if your cooking oil is rancid!
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