You’ve just finished cooking and now you’re holding a jar of sesame oil in your hand and wondering where it is. Does sesame oil need to be refrigerated?
Short answer: It depends on your type. Store roasted (dark) sesame oil in the refrigerator after opening. Regular (light) sesame oil is more stable and can be stored in a cool, dark pantry, but refrigerating it will extend its life even further. The type you have makes a big difference.
For a complete overview of cooking oil and food storage, check out our complete food storage guide.
Important points
- Roasted sesame oil: Store in the refrigerator after opening. Its strong flavor deteriorates quickly at room temperature.
- Regular sesame oil: You can have it in your pantry.However, refrigeration improves quality, especially in warm kitchens.
- unopened sesame oil Both types will keep for 1 to 2 years in a cool, dark pantry.
- It is normal for refrigerator oil to become cloudy. And not a sign of corruption. It becomes transparent at room temperature.
- The enemy of sesame oil Exposure to heat, light and air after opening.
Why are the two types of sesame oil and storage methods different?
Understanding which sesame oil you have is the key to storing it correctly. The two types behave very differently.
regular sesame oil (also known as light or untoasted sesame oil) is pressed from raw seeds and has a high smoke point and a neutral, mild flavor. It works the same way as regular cooking oil. Its fat composition is more stable, so it can be stored well at room temperature in a cool, dark place.
roasted sesame oil (also known as black sesame oil) is extracted from seeds that are roasted before pressing. This roasting process gives it its deep amber color and bold, nutty aroma, making it one of the most distinctive ingredients in Asian cuisine. It is used almost exclusively as a finishing oil, added at the end of cooking or sprinkled on top of finished dishes. The same compounds that give it its amazing flavor also make it significantly more vulnerable to oxidation. If you leave roasted sesame oil at room temperature for several months, it will lose its flavor and eventually go bad. This is consistent with research results on the oxidation and storage stability of sesame oil. National Institutes of Health.
Does roasted sesame oil need to be refrigerated?
yes. Once you open the package of roasted sesame oil, put it in the refrigerator. Due to its polyunsaturated fat content and easily oxidized compounds produced during roasting, it deteriorates significantly faster than regular sesame oil at room temperature.
Refrigeration is not strictly necessary for food safety. Roasted sesame oil, unlike dairy products, does not grow harmful bacteria. The concern is purely about quality. If you leave an opened bottle on a warm kitchen counter or near a stove, it will begin to lose its distinctive flavor within a few weeks and may spoil within 4 to 6 months. If you store the same bottle in the refrigerator, it will retain its best quality for 6 to 9 months.
If you plan to use the roasted sesame oil right away (you will use the bottle within a month or two), it is safe to store it in a cool, dark cabinet. The longer you leave the bottle open, the more a refrigerator becomes essential.
Does regular sesame oil need to be refrigerated?
Not exactly, but it helps. Regular sesame oil is gentler on the skin than toasted sesame oil. Its mild fat profile is more resistant to oxidation and is free of volatile flavor compounds that break down quickly in toasted oils.
A cool, dark pantry away from the stove and direct sunlight is the best place to store regular sesame oil, and it will retain its quality for 6 to 9 months after opening. If frozen, it will last for about a year. In warm kitchens and during the summer months, it is best to use the refrigerator as the default.
What happens if you don’t refrigerate sesame oil?
Room temperature vs refrigeration
Regular sesame oil can be stored at room temperature in a cool pantry if you plan to use it within 6 to 9 months. If you leave toasted sesame oil at room temperature after opening, the nutty aroma and flavor will begin to fade within a few weeks. Within a few months, you may notice that the oil smells monotonous or slightly stale. The odor may be completely gone within 4-6 months. Stinky sesame oil smells like paint thinner or old crayons and will ruin anything you drip on it. The easiest way to avoid this completely is the refrigerator.
Will refrigerating sesame oil affect the flavor?
This is one of the most common concerns, and the answer is no. Low temperatures slow oxidation without changing the flavor components of sesame oil. Bring chilled sesame oil to room temperature before using to achieve its original flavor.
One of the visual changes caused by cooling is cloudiness. Chilled sesame oil may become cloudy or slightly thick. You might be worried if you haven’t seen this before. This is caused by the natural waxes in the oil solidifying at low temperatures. This is not spoilage, does not affect flavor, and will fully recover when the oil warms up. Let the bottle sit on the counter for 10-15 minutes before use and it will return to its normal color and consistency.
The correct way to store sesame oil
Storage best practices
Roasted sesame oil: Refrigerate after opening. Keep the cap tightly closed until use. If you are using a small amount as a finishing oil, the back shelf of the refrigerator (where the temperature is most stable) is best.
Regular sesame oil: A cool, dark pantry or kitchen cabinet away from stoves and heat sources. If your kitchen gets warm or you don’t use it often, store it in the refrigerator.
Unopened bottles (any type): Cool, dark pantry. There is no need to refrigerate until the seal is broken.
Make sure the cap is clean and tightly closed. Wiping the rim after each use prevents the build-up of residue that can harbor bacteria and cause off-flavors.
See also
Store away from heat sources. The cabinets above the stove and next to the oven are the most common areas for oil in the kitchen. Heat significantly accelerates oxidation.
Please purchase the appropriate size bottle. Since the amount of roasted sesame oil used is small, you can leave a large bottle open for a long time. Purchasing smaller bottles that can be consumed within a few months is one of the most practical ways to always have fresh oil on hand. Compared to pouring half a bottle of spoiled oil, the cost difference is minimal.
Ready to use? Try these recipes
If your sesame oil is fresh and ready to use, the Better Living recipe below is a great starting point.
FAQ
My sesame oil has been in my pantry for a year since I opened it. Are you still okay?
Regular sesame oil reaches its expected quality after a year of storage in a cool pantry at room temperature. Check the smell carefully. If it has a mild nutty smell, it’s probably still good. If it smells at all like paint, crayon, or other chemicals, it’s spoiled and needs to be replaced. Toasted sesame oil will almost certainly spoil if left at room temperature for a year. Do a smell test and trust the results.
Can I keep sesame oil next to the stove for quick access?
This is a very common practice and one of the quickest ways to spoil sesame oil. The heat of cooking, and even ambient heat from nearby burners, dramatically accelerates oxidation. Store sesame oil in your cabinet or refrigerator and only remove as much as you need for a particular recipe. For most dishes, simply pouring a small amount into a separate bowl before cooking is sufficient.
Should I warm up refrigerated sesame oil before using it?
Yes, easily. Sesame oil will thicken in the refrigerator and may pour slowly or become cloudy as it cools. Let the bottle sit at room temperature for 10-15 minutes before use, or place it in a bowl of warm water for a few minutes. When it returns to room temperature, it will no longer be cloudy and the oil will pour out normally. This step requires little effort and greatly preserves the quality of the oil.
Are there different ways to freeze sesame oil and olive oil?
somewhat. Olive oil is primarily a monounsaturated fat and is relatively stable at room temperature, so refrigeration is an option for most users. Sesame oil, especially toasted, contains more polyunsaturated fats, which are more reactive. This is why refrigerating toasted sesame oil is highly recommended over olive oil. Both can be refrigerated without loss of quality. The main disadvantage is temporary thickening and clouding, which recovers at room temperature.
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Source: Better Living – onbetterliving.com
