Expiration & Storage Tips
When does sesame oil expire?
Sesame oil usually comes with a 'best by date', but with the right storage its quality remains good for up to a year after that date passes, if unopened. Once opened, you should aim to use it within six months. Freezing sesame oil isn't typically done, but if you decided to do so, it extends the shelf life to six months to a year beyond the 'best by' date.
How do you tell if sesame oil is bad?
Spoiled sesame oil can ruin a dish, and there are few ways to tell when it has gone bad. The most noticeable signs are if the oil has a rancid smell or if it has developed a slightly sour or metallic taste—sesame oil should normally have a delicious, slightly nutty flavor. Also, if you notice that the color of the oil has darkened considerably, it's time to toss it.
Tips for storing sesame oil to extend shelf life
• Store it in a cool, dark place like a cupboard away from the stove or oven. This helps to prevent the oil from developing off-flavors due to heat exposure.
• Make sure your sesame oil is always sealed tight. The more it gets exposed to air, the faster it goes bad, as oxygen can speed up the oxidation process.
• If you buy large quantities of sesame oil, consider dividing it into smaller, airtight containers. This way, you're only exposing a small quantity of oil to air each time you use it.
• Refrigeration can help to retain the flavor and freshness of sesame oil for a longer period. Don't worry if the oil solidifies a little in the fridge—it will return to its liquid state once it reaches room temperature.