No olive oil is perfect. In the best-case scenario, we’re talking about an agricultural product made with an artisan process, which leads to interesting but sometimes undesirable traits.
Although defects in olive oil abound and include briny flavors, a metallic taste, funky aromas and a greasy mouthfeel, these are the most common defects in olive oil. See if you can pick them up.
Fusty/Muddy
This hard-to-describe funky aroma appears in olive oil when the olives are not stored correctly. They’ve fermented developing fusty or muddy scents.
Musty-humid-earthy
You’ll detect scents redolent of a damp cellar or basement when the olives were infected by fungi or yeast due to slow processing or poor storage conditions.
Winey-vinegary
If the olives ferment before being pressed, yeast turns some of the juice into alcohol, literally giving the olive oil winey aromas, or even worse, vinegar scents.
Wet wood
This common defect in olive oil happens when producers process damaged olives, often by frost. Frostbitten olives can damage the oil’s quality.
Rancid
Rancid aromas in olive oil mean that the oil has been exposed to oxygen for extended periods, so the fatty molecules have begun to break down.