Vegetarian Proteins
How long does miso last in the fridge?
Miso keeps 1 year in the fridge, and USDA marks the freezer not recommended — so the tub lives cold, with the lid pressed down onto the paste.
How long does it keep?
| Fridge, from purchase | 1 year |
|---|---|
| Freezer | Not recommended |
Can it sit out?
Miso is perishable — the FSIS 2-hour rule applies.
Perishable food left at room temperature for more than 2 hours should be thrown out — 1 hour if it’s 90°F or hotter (a picnic, a hot car, a summer kitchen).
How to tell if miso has gone bad
- Fuzzy mold — white, blue, or black — sitting on the paste
- A boozy, sharply sour smell over the savory one
- A slimy or bubbling surface
When in doubt, throw it out.
Miso darkens and deepens over its year in the fridge — that’s the ferment carrying on, not spoilage; older paste just wants a lighter hand.
Quick answers
How long does miso last in the fridge?
Miso keeps 1 year in the fridge, and USDA marks the freezer not recommended — so the tub lives cold, with the lid pressed down onto the paste.
Can you freeze miso?
USDA lists freezing as “Not recommended” for miso.
How long can miso sit out?
The FSIS 2-hour rule applies to miso. Perishable food left at room temperature for more than 2 hours should be thrown out — 1 hour if it’s 90°F or hotter (a picnic, a hot car, a summer kitchen).