How long the tempeh has been fermented and what kind of mold it has will determine if it is bad. Although black spots on tempeh should not be considered a sign of spoilage, they can be a sign that it is. Mold growth may occur if the surface of the tempeh contains small spores that are gray or white in color.
If you notice black spots on your tempeh, throw it out and find another brand. This could be an indicator that your tempeh is rotting, but it could also be distracting from the actual process. In addition, the smell of your tempeh should be earthy and not overpowering. It is most likely to smell strongly of alcohol or ammonia.
Rotted tempeh is known for its unpleasant odor. This smell is usually a mixture of alcohol and ammonia. If it has a strong ammonia or alcohol smell, discard it. The texture of the tempeh is another warning sign. Rotted tempeh will have a slimy or crumbly texture. This deterioration indicates the presence of harmful bacteria and mold.
A fresh block should smell earthy and nutty, and have a firm texture. During fermentation, a thin layer of cottony mecelium will form that binds the soybeans together. Healthy mycelium layer is typically white or grey, but it may be gray or black. A healthy texture of the tempeh is not only free from mold but also free of gray and black spots.
Apart from black spots, rotten tempeh can also be identified by an unpleasant odor. Mycelium has antimicrobial properties. If it’s exposed to air, it’s likely to harbor bacteria such as salmonella. To determine if your tempeh is bad, try buying it from a health food store or supermarket. However, if it smells sour, discard it.
Good quality tempeh will be white in colour with mycelium on its surfaces. This is due to mold sporulation of soybeans. Good tempeh should also be firm and white, with no blackish gray spores or any ammonia-like smell. Finally, a good tempeh will not crumble when cut. If it crumbles, it is probably not a good tempeh.
If you’re not sure where to find good tempeh, you can visit a farmer’s market. Most farmers markets have a vendor selling fresh tempeh. It is sometimes sold in the freezer section, next to tofu. It can be found in the natural/health food section. In addition, you can buy steamed tempeh from a health food store. And once you’ve purchased it, don’t forget to try it raw.
When buying tempeh, always be aware of its expiration date. The spores won’t produce the desired result if the tempeh isn’t in a good condition. Check the label to make sure it’s still edible. A spoiled tempeh may have grey spots or not smell as good. If you’re unsure of how to tell if tempeh is bad, try this recipe!