7 Comments
User's avatar
Leon S's avatar

Wow super cool. Thanks for detailing the process. I guess I won’t be making it any time soon as we’re in the tropics so maybe not suitable!

QU Fermentation Studio's avatar

Thanks for the comment, you're probably right! I believe Koreans always make meju in the fall or winter to put a damper on competing unwanted bacteria and fungal populations. On the other hand, living in the tropics is perfect for growing tempeh without additional equipment :)

Leon S's avatar

Haha yes! Speaking of which, we just made our first batch of it last week. I actually used an esky/icebox with a heat lamp/thermostat but as we put the tempeh in I noted our ambient temperature was pretty much 30C! Though we started the process about lunchtime, and I think it best if we started early morning so that the tempeh gets the 12hrs of tropical heat and then gets a little bit cooler overnight, when the temperh starts generating its own heat.

Max's avatar

This is pretty comprehensive. I like the idea of drying in a box where koji was previously grown. Somewhere i saw it suggested to add some natto to the soya beans to promote bacillus subtilis growth. Think that is a good idea? My first attempt smells very strong after a week. Not a good smell. Sort of urine-like if i’m honest. I wonder if it was too moist during the initial heat mat drying phase…

Emil's avatar

Hey ,I made my meju blocks and than soaked them.in salty water for over 1 year.when I strain it last night,the soy sauce had pleasant funk to it,however when.i started to heat it up boy oh boy is smelled strong ammonia! I dumped everything.

Any idea which kind of microorganisms can cause this smell? It was quite strong

Thank uou.

QU Fermentation Studio's avatar

It's a long and complicated answer. I hope to find some time to get back to you soon. Quite busy these days.

Christine Hyung-Oak Lee 🐓💨's avatar

lots of bacillus strains convert amino acids into ammonia...hard to say which one. Temperature also plays a role.