Tofu
Opened tofu keeps 3 to 5 days in the fridge — best in fresh water. A sour smell or slimy surface means: throw it out.
Delicate fresh, simple unopened
Tofu is a fresh product and needs constant refrigeration. Unopened it keeps to the printed use-by date, usually several weeks. Once opened that changes: fresh tofu then keeps only about three to five days and should be used up promptly.
A simple trick extends the life of the opened block: put the tofu in a container of fresh, cold water that fully covers it, and change the water daily. That keeps it moist and fresh longer. Vacuum-packed or smoked tofu generally keeps a little longer than classic fresh tofu in a water bath.
Spoiled tofu gives itself away clearly. Fresh tofu smells neutral to slightly beany and feels firm. If it turns sour or strong in smell, forms a slippery, slimy film on the surface or discolours yellowish to brownish, it should be discarded. With this protein-rich product, when in doubt: better to throw it out than risk it.
To keep tofu longer, you can freeze it. This changes the structure: thawed tofu becomes firmer, more porous and spongier. What sounds like a drawback is prized by many cooks, because porous tofu soaks up marinades especially well. Drain it well before freezing and pack in portions.
How do I spot bad tofu?
Spoiled tofu shows through smell and surface:
Instead of neutral and beany, the tofu smells sour or strong — a clear sign of spoilage.
A slippery, slimy film on the block is a stop signal.
A yellowish to brownish colour points to spoilage.
Smell the tofu and feel the surface. Fresh tofu smells neutral to slightly beany and feels firm and smooth. If it smells sour or strong, or the surface feels slippery and slimy, it has spoiled — then do not use it. A slight cloudiness of the liquid in the pack, by contrast, is normal and no cause for concern.
Shelf life at a glance
Once opened, every day counts:
| State | Shelf life |
|---|---|
| Unopened, refrigerated | to the use-by date |
| Opened, in water (chilled) | 3–5 days |
| Smoked/vacuum-packed | a little longer |
| Frozen | several months |
Store it right
This keeps tofu fresh longest:
In fresh water — put the opened block in water and change it daily.
Keep refrigerated — tofu belongs in the fridge at all times.
Work cleanly — remove with clean utensils, do not introduce germs.
Freezing works — changes the texture, ideal for marinating.
Common myths
A few myths surround tofu:
No — as a protein-rich fresh product it is actually quite delicate after opening.
Not necessarily — slight cloudiness is normal; smell and surface are what matter.
No — the texture turns firmer and spongier, which many even prize for marinating.
Frozen tofu changes its structure: after thawing it becomes firmer, more porous and spongier. What sounds like a drawback is an advantage in many recipes, because the porous tofu soaks up marinades and sauces especially well. Drain well before freezing and pack in portions. The firm, pressed variety also suits frying and grilling better than soft silken tofu, which is more for soups, desserts and dips.