Last updated: June 10, 2026.
Yes, tofu can go bad. Bad tofu may smell sour, feel slimy, show mold, sit in cloudy liquid, or come from a swollen package. When tofu looks or smells off, throw it away instead of trying to cook the problem out.
Quick Answer
| Tofu situation | What to do |
|---|---|
| Unopened refrigerated tofu | Follow the package date and keep it refrigerated |
| Opened tofu | Store covered in clean cold water in the refrigerator and change the water daily |
| Cooked tofu leftovers | Refrigerate promptly and use like other cooked leftovers |
| Tofu with sour smell, slime, mold, or swollen packaging | Discard it |
| Tofu you cannot use soon | Freeze it, but expect a firmer, spongier texture after thawing |
Signs Tofu Has Gone Bad
- Sour or rotten smell: fresh tofu should smell mild.
- Slimy or sticky surface: texture changes can signal spoilage.
- Mold: discard the tofu immediately.
- Cloudy storage water: replace water daily, and discard tofu if the tofu itself smells or feels off.
- Swollen unopened package: do not use it.
How To Store Opened Tofu
- Move leftover tofu to a clean container.
- Cover it with clean, cold water.
- Seal the container and refrigerate it at 40 degrees F or below.
- Change the water daily.
- Use it within a few days, or follow the shorter timing on the package if the brand gives one.
Some tofu brands recommend using opened tofu within 2 to 3 days. Other kitchen guides allow a little longer when water is changed daily. For Food Readme, the practical rule is simple: use opened tofu quickly, keep it cold, and discard it at the first sign of spoilage.
Can You Freeze Tofu?
Yes. Drain tofu, wrap it well, and freeze it in a freezer-safe bag or container. Freezing changes tofu’s texture: it becomes chewier and more sponge-like, which can be useful for stir-fries, baked tofu, and sauces, but it may not suit silky dishes.
Can You Eat Tofu After The Date?
Do not treat the date as the only safety test. If unopened tofu is still within the package date and has been refrigerated properly, it is usually straightforward. If the date has passed, the package is swollen, or the tofu smells sour or looks wrong, discard it. When in doubt, throw it out.
Food Safety Notes
- Keep tofu and tofu dishes refrigerated at 40 degrees F or below.
- Do not leave tofu dishes at room temperature for more than 2 hours, or more than 1 hour above 90 degrees F.
- Store cooked tofu leftovers in a covered container.
- Do not taste tofu to test whether it is safe.
FAQ
What does bad tofu smell like?
Bad tofu often smells sour, fermented, or unpleasant instead of mild and clean. If the smell makes you pause, throw it away.
Is slimy tofu safe to eat?
No. A slimy or sticky surface is a spoilage warning. Discard the tofu rather than rinsing it and cooking it.
Should opened tofu be stored in water?
Yes, for water-packed tofu, store the leftover block in clean cold water in a covered container and change the water daily. If the package gives different instructions, follow the package.
Can cooked tofu go bad?
Yes. Cooked tofu leftovers should be refrigerated promptly and used within the normal leftover window. Discard them if they smell off, grow mold, or were left out too long.