Sauerkraut lasts longest when you follow the package label, keep it cold after opening, and keep fermented cabbage covered with clean brine. Unopened shelf-stable sauerkraut can stay in the pantry until the package date. After opening, refrigerate it, use clean utensils, and discard it if you see mold or smell a rotten odor.
Storage Guide
| Type of sauerkraut | Before opening | After opening |
|---|---|---|
| Shelf-stable jar or can | Pantry until the package date if the seal is sound | Refrigerate in a covered container and follow the label’s opened-storage guidance |
| Refrigerated raw sauerkraut | Keep refrigerated | Keep cold, covered, and under brine when possible |
| Homemade fermented sauerkraut | Ferment by a tested process, then refrigerate or preserve by a tested method | Keep cold, use clean utensils, and keep cabbage below brine |
| Cooked sauerkraut leftovers | Not applicable | Refrigerate promptly and treat like cooked leftovers |
What Makes Sauerkraut Last Longer?
Acidity, salt, cold storage, and clean handling all matter. Fermented sauerkraut keeps best when the cabbage stays under brine, the jar is covered, and clean utensils are used. Heat-treated shelf-stable sauerkraut should be treated like an opened packaged food once the seal is broken.
Signs Sauerkraut Has Gone Bad
- Fuzzy mold or colored growth on the surface, lid, or jar rim
- Rotten, putrid, yeasty, or otherwise unpleasant odor
- Slimy texture that is different from the normal briny feel
- Leaking, bulging, spurting, or a seal that seems unsafe
- Unknown storage history, especially after opening
Brine Matters
For fermented sauerkraut, brine helps keep the cabbage covered and protected. If the top cabbage dries out, darkens, or grows mold, do not stir it back into the jar. Discard unsafe sauerkraut rather than trying to rescue it.
FAQ
How long does sauerkraut last?
It depends on the type. Unopened commercial sauerkraut should follow the package date. After opening, keep it refrigerated, covered, and submerged in brine when possible.
How do you know sauerkraut has gone bad?
Discard sauerkraut with mold, fuzzy growth, a rotten or yeasty odor, slimy texture, gas pressure that seems unsafe, or cabbage that was not kept cold after opening.
Does sauerkraut need to be refrigerated?
Refrigerated or raw sauerkraut needs refrigeration. Shelf-stable jars or cans can stay in the pantry until opened, then should be refrigerated.
Can you keep sauerkraut after the best-by date?
Use the package date as a quality guide and inspect the product carefully. Do not use sauerkraut with spoilage signs or unsafe storage history.
Should sauerkraut stay covered in brine?
Yes, for fermented sauerkraut, keeping the cabbage under clean brine helps protect texture and quality. Use clean utensils so the jar stays cleaner.