How to Tell If Jarred Pasta Sauce Is Bad
Quick answer
Jarred pasta sauce is bad if you see mold, smell a sour or fermented odor, or hear a hiss or see a bulging lid. Opened jars last about 5 to 7 days in the fridge, and unopened up to 18 months in the pantry.
Signs Jarred Pasta Sauce has gone bad
- Mold on top or under the lid. Fuzzy spots in white, green, or black. Mold can grow through the sauce, so don't scoop it off and eat the rest.
- Sour, fermented, or alcohol-like smell. Good sauce smells sweet and tomato-forward. A fizzy, yeasty, or vinegary smell means it's gone off.
- Bulging lid or no pop on opening. Safety buttons on jar lids should be pulled down. A bulging, popped-up, or leaking lid on an unopened jar means gas inside. Don't open or taste it.
- Bubbles or fizzing. Fresh sauce shouldn't bubble when cold. Fizz is a sign of fermentation.
- Open longer than a week. Even with a normal look, sauce open for more than 7 to 10 days in the fridge is better thrown out.
Looks weird, but it's fine
- Oil on top. Oil separates from tomatoes and rises to the surface. Stir it in.
- Darkening at the surface. Air exposure can turn the top layer a darker red or brown. If it smells right, stir and use it.
- Thicker after chilling. Cold sauce firms up. It loosens when heated.
How long does Jarred Pasta Sauce last?
| Where | How long | Note |
|---|---|---|
| Pantry (unopened) | 12 to 18 months | Check the best-by date |
| Fridge (opened) | 5 to 7 days | Transfer to a lidded container if the jar is chipped |
| Freezer | 3 to 4 months | Leave room for expansion |
How to store it
- Refrigerate right after opening and keep the lid on tight.
- Freeze leftover sauce in ice cube trays or small tubs before it hits the week mark.
- Use a clean spoon to avoid introducing bacteria.
Use it up before it turns
Frequently asked questions
How long does pasta sauce last after opening?
About 5 to 7 days in the fridge. If you can't finish it, freeze it for up to 3 or 4 months.
Can you eat pasta sauce with a little mold on it?
No. Mold can penetrate a wet sauce and some molds produce toxins. Discard the whole jar.
What if the jar lid doesn't pop when I open it?
A missing pop can mean the seal failed. Don't use the sauce, especially if the lid is bulging or the sauce smells off. When in doubt, throw it out.
More food freshness guides
General guidance based on USDA FoodKeeper. Storage times are estimates and conditions vary. When in doubt, throw it out.