Sweet chili sauce is a popular Asian dip and condiment that is also known as nam chim kai, and unless you plan to use all of it in one sitting, you’ll have to decide where it lives. So does it need the fridge? An unopened bottle is fine in the pantry. Once it’s open, the fridge is the right call. The brands say so, and it keeps the sauce tasting fresh for longer. Homemade sweet chili sauce goes in the fridge from the start.
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Do you need to refrigerate sweet chili sauce after opening?
Whether you should refrigerate sweet chili sauce or not depends on several factors like whether it was homemade or commercial and whether the container is open or sealed. There is no need to refrigerate an unopened container of commercially made sweet chili sauce.
What about an open bottle? Follow the label. Thai Kitchen’s says to refrigerate after opening, and Kikkoman says its sauces belong in the fridge after opening. You can usually store commercial sweet chili sauce at room temperature for short periods. But you should refrigerate any opened container if you plan to store it for a long time.
Left a bottle out overnight? USDA’s FoodKeeper doesn’t list sweet chili sauce, but it does cover shelf-stable chili sauce, ketchup and cocktail sauce. It calls them safe at room temperature after opening. The refrigeration advice on their labels is about quality rather than safety, it says. That chili sauce is the ketchup-like American kind, so treat it as a rough guide for the Thai-style bottle.
How long does sweet chili sauce last?
| Sweet chili sauce | How long it keeps | Who says so |
|---|---|---|
| Unopened, in the pantry | Until the best-by date. USDA gives similar shelf-stable chili sauce about a year. | The bottle; USDA FoodKeeper |
| Opened and refrigerated | Best within about a month. USDA allows up to 6 months for opened chili sauce in the fridge. | Kikkoman; USDA FoodKeeper |
| Opened, at room temperature | Short stretches only. The brands say to refrigerate. | Thai Kitchen and Kikkoman labels |
| Homemade, refrigerated | Up to a week, tightly covered. | Our sweet Thai chili sauce recipe |
| Homemade, frozen | Up to three months, in small portions. | Our sweet Thai chili sauce recipe |
Why the gap between a month and six? Kikkoman’s advice is about flavor. As a guideline, it suggests using its sauces within a month of opening for the freshest taste and checking an open bottle before each use. And the longer an open container of sweet chili sauce is stored at room temperature, the shorter its shelf life will be, even if you move it to the refrigerator later.
What’s in a bottle of sweet chili sauce?
As a sweet and tangy sauce with a mild heat, sweet chili sauce is commonly served with fried foods and as a stir-fry sauce. Most brands make it the same way. Sugar comes first, then water, chili, garlic and vinegar or another acid. Of the six bottles below, only one lists a preservative.
| Brand | First ingredient | Acid | Preservatives |
|---|---|---|---|
| Mae Ploy | Sugar | Vinegar, pickled red chili | None listed |
| Thai Kitchen | Pure cane sugar | Rice vinegar | None listed |
| Kikkoman | Sugar | Vinegar, citric acid | None listed |
| Lee Kum Kee | Sugar | Rice vinegar, acetic acid, citric acid | None listed |
| Frank’s RedHot | Water (sugar is second) | Acetic acid | None listed |
| Great Value Thai Style | Sugar | Distilled vinegar | Potassium sorbate, sodium benzoate, sodium bisulfite |
Ingredient lists are from USDA’s FoodData Central and Thai Kitchen’s own product page. Brands change their recipes now and then, so the bottle in your hand is the final word.
Does refrigerating sweet chili sauce change its flavor?
Typically, storing sweet chili sauce in the refrigerator will have absolutely no impact on its flavor, but there are a few cases where it might. The flavor of sweet chili sauce may change if the container is not sealed. With an unsealed container, the smells of other items in the refrigerator may contaminate the sauce and affect its flavor profile. The sauce’s flavor may change if it has been stored for too long and has begun to spoil.
Some people believe that storing hot sauces and food items in the refrigerator can either make them more or less spicy, but there is no conclusive evidence to support either claim (beyond just normal infusion times).
Does sweet chili sauce get thicker in the fridge?
Depending on its recipe, sweet chili sauce may thicken when stored in the refrigerator. A thicker sauce may be desirable for some applications, especially if you intend to use it as a dipping sauce or as a condiment for cold dishes. The sauce will return to its normal consistency when it gets to room temperature.
Furthermore, if you have a fermented sweet chili sauce, storing it in the refrigerator will slow the fermentation down, which helps the sauce last longer.
How can you tell if sweet chili sauce has gone bad?
You will be able to tell if your sweet chili sauce is spoiled or has begun to spoil by its sour smell and/or the presence of visible mold. Kikkoman puts it simply: if a sauce ever tastes or smells unusual, don’t use it.
What about mold? The fridge won’t fully stop it. USDA’s guide to mold says molds handle sugar better than most spoilers and can grow at refrigerator temperatures. If you see fuzz or a film on the sauce or around the cap, throw the bottle out rather than scraping the top off. And don’t sniff it. A clean spoon and a wiped cap help keep it from getting started.
How long does homemade sweet chili sauce keep?
In general, you should refrigerate homemade sweet chili sauce since the conditions in which it was made may be less stringent than those in a commercial facility. Ours lasts up to a week, covered tightly and kept cold. Frozen in small batches, it keeps about three months. Want to make a batch? Try our homemade sweet chili sauce recipe.
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Related reading
- Refrigerating Hot Sauce: The Fact And Fiction: Do you need to keep those hot sauces in the fridge? Or are many ok to remain out even after opening?
- What’s A Good Sweet Chili Sauce Substitute? Don’t have this popular ingredient at hand? You have a few options.
- Can You Freeze Hot Sauce? Refrigerating is one thing, but freezing? How does that work with hot sauces? We break it down.