Darn... I was hoping to be able to make Rice Koji without existing Rice Koji as a starter, because I can't buy Rice Koji where I live. Ah well. Still an informative video! Thank you.
Look up Sandor Kat's book the art of fermentation, I've heard you can cultivate wild aspergillus oryzae from corn husks or rice ears and isolate asp. Oryzae from other toxic wild molds if you do it right. It's possible, I'm sure about that much. It's just really new to people who speak English
i recently found a video about it. they put steamed rice into the corn leaves like tamales. and let them fermantated abot 3 days, checking everyday for white mold and discarding colorful ones. then they added white ones to big batches of rice like in this video. but they dont recommend doing this procces at home incase of wrong mold growing. they check white molds on microscope.
Hello, thank you for sharing this simple tutorial video in how to make Koji Rice. From time to time, I do ask some YouTUBERs here to describe the aroma of Kome Koji and received many different answers. Most of them clearly said it has a sweet aroma and so far only said it has a green tea aroma. I know you did mention the aroma is like chestnut starch. But, had you ever encountered with a green tea aroma when making Kome Koji?
@Habibie The different koji mold of the original brand result in varying flavors of koji, which is not surprising. Similarly, when it comes to each type of food, the effects of each person's sense of smell can also differ. The koji that I use in this video, I found it taste sweet aroma but never detected a green tea aroma. However, as long as there are no colorful fungal threads. The koji rice cake present a thick, pure white consistency, it can be considered a success
@@beanpandacook Thank you for your quick response with some advices. A few days ago, I made a very tiny substrate with cooked rice on a 1 cm x 4 cm dried corn husk and incubated @37.8°C (that is a factory setting on my W9005 Digital Temperature Controller for eggs) for 72 hours until it produced green spores. When I removed the plastic seal, the aroma came out smelled like green tea (which confirmed to an answer from a YouTUBER who cultivate Koji Kin using some sun-dried corn leaves). At the same time and with a 1 cm thick rice substrate in a glass, I let it ferment in an incubator with a W3230 Digital Temperature Controller. After 12 hours, the rice substrate started to turn light yellowish and emitted a pungent sweet aroma with a slight of bitterness at the end. I let it incubate for 72 hours to produce green spores. Then, I continued to incubate it past 92 hours and the spores turned to reddish color. I searched through Google and YouTUBE videos and this looks more likely an Aspergillus Flavus fungus (en.wikipedia.org/wiki/Aspergillus_flavus) which can produce some toxic compounds known as mycotoxins.😏
Finally, I understand whats your problem. Some koji kin are in green colour that are for fermenting soysauce and soybean products. you could find ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-8YSNQ1PTV5o.html. You are doing natural culture of koji kin which is quite different from what i am doing. The strains of mold used by ancient people were found in nature, but their effects were very unstable. Modern ways of koji kin are purified and extracted using technology to obtain the most suitable and strong spores for fermentation which are Not easily contaminated. There is a certain risk in trying to culture your own koji kin, and I do not encourage this method because without scientific instruments and professional knowledge, it is difficult to determine the nature of the mycelium obtained. From the point of food safety, I still recommend purchasing branded koji kin for inoculation.
@@beanpandacook Thank you for your quick response with recommendation. First of all, my sincere apology for not being straightforward letting you know what I've been doing on w.r.t cultivating Koji in the first place. I started getting interest in Koji about 6 months ago when my friend who bought a defective ZFX W9005 Eggs Temperature Controller didn't know what to do with it when AliExpress gave a full refund. So, I took over and started to tinker with it. Using this W9005 and a used shipping carton box, I was able to construct a simple makeshift incubator and used it to ferment the Indonesian "Tape Ketan". The end product was spectacular. This makeshift incubator had since been decommissioned due to a fire hazard. Regardless, this experiment gave me some insight idea on the simple basic working knowledge of an incubator. So, at the beginning of the year, I headed to AliExpress and found a W3230 Digital Temperature Controller under US $2 + a Free shipping to US. Also, local retail companies, i.e. HomeDepot, Walmart, etc., had some big sales on merchandise left over from last X'mas sales and one of them was an extension cord (under US $1.5). With an inexpensive basic Electric Lunch Box (under US $3), a W9005 or W3230, and an extension cord, I was able to construct a mini semi-permanent simple incubator/dehydrator and/or a slow cooker to ferment "Tape Ketan", "Tempeh", and Yogurt. During this time, I ran into some YouTUBE videos on how to cultivate Kome Koji and/or Koji Kin sans a Koji starter. At first, I didn't feel like trying to cultivate Koji due to the same reasons you mentioned above. To make a long story short, I recently decided to jump into the bandwagon and here I'm still swimming in a shallow water. Until I am pretty convince with the result I cultivate is an Aspergillus Oryzae fungus, I don't think I will use it to ferment anything for consumption. This means I will need to spend a lot of $$ to invest on the right equipments to be able to identify the Aspergillus Oryzae fungus. Living a frugal life, this will be out of my reach. This leaves me two choices, namely buy a commercial Koji Kin or asking any Koji users here to send me a minimal sample to cultivate and compare. Sure enough anyone here will say that I will end up losing some of my free time as well as paying some additional electric bill, instead of buying some Koji Kin. However, doing all this to learn something new is a whole lot of fun for me to enjoy. Also, this gave me some insight idea on how to repurpose any old electric cooking vessel (with a manual switch) as an incubator, a dehydrator, a variable temperature controlled slow cooker (thus a sue vide), etc. Last but not least important is I get to know and/or chat with nice people like you and to learn something new from. Again, thank you very much for all your responses with advices. Cheers.
Hi, thank u for your video. I tried to use store bought dried /dehydrated koji rice to do like what u touched but after 30hrs the rice turn abit yellowish green tea colour (a little coated) .... And after 43hours the rice coated more....Is this colour normal ?
I had the same issue. It was a humidity issue for me. I laid damp cloths on top and put a plastic bag over the top to hold the moisture in. Get nice dense mats now in the last few hours of fermenting.
I live in a small town in United States. It's hard to get Koji rice. Can i use any yeast or yeast that makes cake? Can i use little Koji rice powder that's left over to make Koji?
Koji rice is cooked rice that has been inoculated with Aspergillus oryzae This mold is different from other yeast You can get the koji from amazon amzn.to/2HVv0zs
Do you keep the oven temperature the same at 35 degree all the time ( from beginning until the end) ? Do you monitor the rice temperature ? After 28 hour , the rice get warm by itself , do you still need to maintain the oven temperature 35 degree or not ? After 38 hours , my rice get some green spores before all the rice turn white ? Can you tell me what I did wrong ? Thank you .
Yes, it is required to monitor the rice temperature, when the rice get warm itself, there is no need to maintain the oven temperature, when the rice rise over 35C, flip the rice cake to cool down a bit
Hello @肥丁手工坊 Beanpanda Cooking Diary . I really appreciate for this awesome informative and relaxing video. This is the one of the best video i have ever watch on RU-vid. Keep it that way, thank you so much! But i have a question. I watch other Koji-Rice videos and rice goes green with spores. But your Koji-Rice is perfect! nearly pure White. Is there any technique that i can keep that white formations? I want my Koji-Rice white as possible. More mycelium less spores. What can you suggest about that?
There are different kinds of koji starter. The white koji starter I used in the video origin from Japan. This kind of koji are usually for making of sake, miso, amazake and Japanese soy sauce. I have used the green koji which origin from China for making soy sauce and doubanjiang ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-8YSNQ1PTV5o.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-62_VlV0Im9U.html
@@beanpandacook So one of them is white and one of is green you say. I assume one of blended Koji Mycelium and other one is spore? Because i never seen in videos, a white Aspergillus Oryzae spores on youtube.? Could you answer this please?
Thank you for sharing your process on koji making. I tried making a batch this weekend following your steps, but the resulting mold was grey in colour. Is this considered failed?
Hi Beanpanda, very nice food you make. My question is that what brand of blender you are using to blend the materials. It looks small and very functional. Thaxxx.
@@beanpandacook Thank you for reply. I was asking the small cup blender you were using to blend powder in small quantity. It amazes me a lot because I need such small device than bigger one. Thank you very much!!
that is a steam oven, so basicly in this case it plays the role of a steamer. Just use a regular steamer or put the whole bowl of the rice in water and let the water boil for 50 mins (don't let the water contact with the rice)
