You opened a package of tempeh and it is covered in white fuzz with a few dark spots. It looks like it has gone bad. You are about to throw it out. Before you do: that is exactly what fresh, healthy tempeh is supposed to look like. Knowing that one fact will save you from tossing perfectly good food more than once.
Does tempeh go bad?
The short answer: Yes, but the spoilage signs are different from most foods because tempeh is a living fermented product. Opened tempeh lasts 3 to 5 days in the refrigerator in an airtight container. Unopened refrigerated tempeh is typically good for 5 to 7 days past the sell-by date when stored continuously cold. White fuzzy mold and black or gray spots are normal and safe. Pink, green, or blue mold means discard. An ammonia smell means discard.
For a broader look at how fermented and plant-based foods are stored, see our Food Storage Guide. If you also cook with tofu, see Does Tofu Go Bad?
Key Takeaways
Opened tempeh: 3 to 5 days in an airtight container in the fridge
Unopened refrigerated tempeh: 5 to 7 days past the sell-by date if consistently cold
Vacuum-sealed pasteurized tempeh (most store-bought): can last weeks past the sell-by date unopened
Cooked tempeh: 3 to 5 days airtight in the fridge
Freezer: up to 3 to 6 months; slight texture change but safe
White fuzzy coating and black or gray spots: normal, not spoilage
Pink, green, blue, or orange mold: spoilage, discard immediately
Ammonia or sharp chemical smell: spoilage, discard
Room temperature limit: 2 hours
Why Tempeh Looks Different From Other Foods
Tempeh is made by inoculating cooked soybeans with a mold culture called Rhizopus oligosporus and allowing it to ferment. The mold binds the soybeans together into a dense cake and creates the white mycelium coating you see on the outside. That coating is not a sign of spoilage. It is the mold culture that made the tempeh in the first place, and it continues to grow slowly in the refrigerator.
Most of the confusion around tempeh spoilage comes from applying the wrong framework to it. For most foods, visible mold means throw it out. For tempeh, white fuzzy mold on the surface is a sign of a healthy, active product. The question is not whether mold is present. The question is which color it is.
Most store-bought tempeh has been pasteurized, which kills off live cultures and extends shelf life significantly. Pasteurized tempeh will show less visible mold activity in the package but the same spoilage indicators apply. Fresh, unpasteurized tempeh from specialty markets or Asian grocery stores has live cultures and will show more visible mycelium growth. Both types need to stay refrigerated and follow the same time windows.
How Long Does Tempeh Last?
Type
Refrigerator
Freezer
Unopened, fresh or vacuum-sealed
5 to 7 days past sell-by date
3 to 6 months
Opened, raw
3 to 5 days airtight
3 to 6 months
Cooked tempeh
3 to 5 days airtight
3 to 6 months
The sell-by date on tempeh is a stocking guide for tÂ
