Blue Cheese
The answer
Opened blue cheese lasts 1–2 weeks in the fridge. Surface mold veins are normal — sliminess or ammonia smell are not.
Caution Blue cheese is intentionally moldy, but discard it if the whole piece turns slimy or smells sharply of ammonia.
How long it keeps
Fridge (40°F) 1–2 weeks (opened) safe window
Freezer (0°F) 6 months (crumbles poorly) best quality
Room temp 2 hours max then discard
Discard Discard if slimy throughout, pink or black unexpected mold, or strong ammonia odor.
By state & packaging
State Fridge Freezer
Opened wedge 1–2 weeks 6 months
Crumbled, opened ~1 week 3 months
Signs it has gone bad
✕ Slimy surface beyond normal veins
✕ Sharp ammonia smell
✕ Pink or black mold
FAQ
Is extra mold on blue cheese bad?
Blue veins are normal. Discard the cheese if it is slimy throughout or smells strongly of ammonia.