07/27/2026
The Mold Is the Tempeh
By
Tempeh (or tempe, as it's spelled in its country of origin, Indonesia).
For most foods, visible mold means throw it out. For tempeh, the mold is the food.
That white network covering the beans is a fungus called Rhizopus. As it grows through the beans it does two things simultaneously. It binds everything into one solid, sliceable block and pre-digests the proteins, unlocking nutrients that would otherwise be harder for your body to absorb.
That's why tempeh is easier to digest than plain beans. The fermentation does the work your gut would otherwise have to do.
Tempeh is also one of the safest fermentations you can make at home. The combination of acidity and incubation temperature creates conditions where only Rhizopus can survive. Harmful microbes simply can't compete.
If the white stuff has been quietly stopping you from trying tempeh, this is your permission to dive in. The mold is exactly what makes it work. π±
Try some store-bought or make your own.
Comment 'send recipe' and I'll DM you my homemade tempeh recipe, or find it directly at wendythefoodscientist.com π₯’