You’ve just finished cooking and now you’re holding that bottle of sesame oil wondering where it is. Does sesame oil need to be refrigerated?
Short answer: It depends on which type you have. Roasted (dark) sesame oil should be kept in the refrigerator after opening. Plain (light) sesame oil is more stable and can last in a cool, dark pantry, although refrigeration further extends its life. The type you have really makes the difference.
For a complete overview of storing cooking oils and pantry staples, visit our complete food storage guide.
key takeaways
- Roasted sesame oil: Cool after opening. Its intense flavor spoils quickly at room temperature.
- Plain sesame oil: Pantry is fineBut refrigeration improves quality, especially in hot kitchens.
- loose sesame oil Either type, it stores well in a cool, dark pantry for 1 to 2 years.
- cloudy refrigerated oil is normal And no signs of deterioration. It becomes clear at room temperature.
- The biggest enemies of sesame oil After opening there is exposure to heat, light and air.
Two types of sesame oil and why there is a difference in storage
Understanding which sesame oil you have is key to storing it correctly. The two types behave very differently.
plain sesame oil (Also called light or roasted sesame oil) is pressed from the raw seeds and has a neutral, mild flavor with a high smoke point. It works like normal cooking oil. Its fat structure is more stable, meaning it holds up quite well at room temperature in a cool, dark pantry.
roasted sesame oil (also known as dark sesame oil) is pressed from seeds that are roasted before pressing. The roasting process is what gives it the deep amber color and pungent, nutty aroma that makes it one of the most distinctive ingredients in Asian cooking. It is used almost exclusively as a finishing oil, added at the end of cooking or sprinkled over the entire dish. The same compounds that create that incredible flavor also make it significantly more sensitive to oxidation. According to research on sesame oil oxidation and storage stability published by, roasted sesame oil will lose flavor and eventually become rancid if left at room temperature for months. National Institutes of Health.
Does roasted sesame oil need to be refrigerated?
Yes. Once opened, the roasted sesame oil should be stored in the refrigerator. Its polyunsaturated fat content and oxidation-prone compounds created during roasting mean that it degrades significantly faster than plain sesame oil at room temperature.
Refrigeration is not strictly required for food safety. Harmful bacteria will not grow in roasted sesame oil like dairy products. The concern is purely of quality. An open bottle left on a hot kitchen counter or near the stove can begin to lose its distinctive flavor within just a few weeks, and will likely go rancid within 4 to 6 months. The same bottle kept in the refrigerator retains the highest quality for 6 to 9 months.
If you use roasted sesame oil quickly (finishing a bottle within a month or two), pantry storage in a cool, dark cabinet is perfectly acceptable. The longer the bottle remains open, the more refrigeration becomes necessary.
Does plain sesame oil need to be refrigerated?
Not strictly, but it helps. Plain sesame oil is more beneficial than roasted sesame oil. Its lighter fat profile is more resistant to oxidation, and it lacks the volatile flavor compounds that go rancid so quickly in frying oil.
A cool, dark pantry away from the stove and direct sunlight is the perfect storage location for plain sesame oil, and this way it will remain in good quality for 6 to 9 months after opening. Refrigerating it extends its shelf life to about a year. In hot kitchens or during the summer months, refrigeration becomes a better default.
What happens if you don’t keep sesame oil in the refrigerator?
room temperature vs refrigerated
For plain sesame oil, storage at room temperature in a cool pantry is fine if you use it within 6 to 9 months. For toasted sesame oil, leaving it out at room temperature after opening means the nutty aroma and flavor will begin to dissipate within a few weeks. Within a few months you may notice the oil starting to smell flat or slightly rancid. Within 4 to 6 months it may smell completely rancid. Rancid sesame oil smells like paint thinner or old crayons and whatever you spray it on will be ruined. The easiest way to avoid this completely is with a refrigerator.
Will refrigerating sesame oil affect its taste?
This is one of the most common concerns, and the answer is no. Cold temperatures slow oxidation without altering the flavor compounds in sesame oil. When you bring refrigerated sesame oil back to room temperature before using it, it tastes exactly as it should.
One visible change caused by refrigeration is cloudiness. Cooled sesame oil may appear cloudy or slightly thick, which may be worrisome if you haven’t seen this before. This is caused by the natural wax in the oil solidifying at cold temperatures. It does not spoil, its taste is not affected and it completely reverses when the oil is heated. Leave the bottle on the counter for 10 to 15 minutes before using and it will return to its normal color and consistency.
How to store sesame oil correctly
Best Storage Practices
Roasted Sesame Oil: Refrigerate after opening. Keep cap tightly closed between uses. For small quantities used as finishing oil, the back shelf of the refrigerator (where the temperature is most consistent) is ideal.
Plain Sesame Oil: A cool, dark pantry or kitchen cabinet away from the stove and any heat sources. If your kitchen runs hot or you don’t use it frequently, keep it in the refrigerator.
Closed Bottles (Both Types): Cool, dark pantry. No refrigeration required until seal is broken.
Keep the cap clean and tight. Wiping the rim after each use prevents residue build-up, which can lead to bacteria and bad taste.
See also
Keep away from heat sources. The cabinet above the stove or next to the oven is the worst place in the kitchen for any oil. Heat speeds up oxidation significantly.
Buy the right size bottle. Since roasted sesame oil is used in small quantities, a larger bottle can remain open for a longer period of time. Buying a small bottle that you’ll finish off within a few months is one of the most practical ways to always have fresh oil on hand. The cost difference is minor compared to pouring half a bottle of rancid oil.
Ready to use it? Try these recipes
If your sesame oil is fresh and you’re ready to put it to work, these Better Life recipes are a great starting point:
Frequently Asked Questions
My sesame oil has been sitting in the pantry for a year since I opened it. Is it still good?
For plain sesame oil, one year at room temperature in a cool pantry is on the outer edge of expected quality. Check the smell carefully. If it smells sweet and mild, it’s probably still OK. If it smells like paint, crayons, or any chemicals, it is worn out and should be replaced. For roasted sesame oil, keeping it at room temperature for up to a year almost certainly means it has gone rancid. Do a smell test and trust the results.
Can I keep sesame oil next to the stove for easy access?
This is a very common habit and one of the fastest ways to ruin sesame oil. The heat from cooking, even ambient heat from a nearby burner, dramatically accelerates oxidation. Keep sesame oil in a cabinet or refrigerator and take out what you need for a specific recipe. Most recipes require you to add a little water to a separate bowl before cooking.
Should I warm refrigerated sesame oil before using?
Yes, in short. Sesame oil thickens in the refrigerator and may fall out slowly or appear cloudy as it cools. Leave the bottle at room temperature for 10 to 15 minutes before using, or place it in a bowl of warm water for a few minutes. Once it returns to room temperature, the cloudiness clears up and the oil flows normally. This step requires almost no effort and largely preserves the quality of your oil.
Does refrigeration work differently for sesame oil than olive oil?
To some extent. Olive oil is primarily monounsaturated fat and is relatively stable at room temperature, making refrigeration optional for most users. Sesame oil, especially the roasted variety, is high in polyunsaturated fats that are more reactive. This is why refrigeration is more strongly recommended for toasted sesame oil than for olive oil. Both can be refrigerated without any quality loss. The main inconvenience is temporary thickening and cloudiness which reverses at room temperature.
Further reading
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