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Learn how to easily make tempeh at home using soybeans or other types of beans at home. You can use an oven or instant pot to culture the tempeh.
Making my own tempeh is another one of the projects that have been on my list for a few years now and finally, I’ve gotten a chance to do it. Tempeh is considered a “street food” in Indonesia. It’s sold at the market and considered a very cheap source of protein and they are highly nutritious. Some even said tempeh are “poor people” food. Nowadays though, with the vegan population continue to rise, tempeh has become one of the important protein sources worldwide. Tempeh is definitely not a “poor people” food here in the U.S. 🙂 They aren’t cheap and that’s why I decided to make my own tempeh using a tempeh starter.
MAKING TEMPEH ISN’T AS HARD AS YOU THINK
The thought of making my own tempeh maybe a bit overwhelming at first. There is really no fancy equipment needed. They only need a warm environment to culture, which is how the weather is like in Indonesia. It may be a bit tough in winter time, but I use my kitchen oven or now I have Instant Pot, to let them incubate and culture. They are really easy to grow. But after making it once, there’s no stopping me 🙂 It’s very rewarding and not to mention homemade tempeh tastes the best for real!
WHERE TO BUY TEMPEH STARTER
I got my tempeh starter (Rhizopus mold) from Amazon and I use this (affiliate link) or you can get it directly from Cultures for Health (not sponsored). I’ve been using their tempeh starter for years without any problems. They have regular soy tempeh starter and non-soy tempeh starter
YOU CAN USE DIFFERENT BEANS TO MAKE TEMPEH
I’ve used the same tempeh starter to make black beans and chickpeas tempeh. You can use any kind of beans you like such as mung beans, red beans, etc.
TO DEHULL OR NOT DEHULL THE SOYBEANS
In the past I’ve always dehull the beans as much as I can after soaking, but this year, I’ve been making 5 batches of tempeh so far without much dehulling (only remove whatever that floats to the top after a quick rubbing) and the tempeh blocks still turned out great. So, I would say you don’t have to be obsessed about removing the hulls so much.
YOU DON’T NEED A SPECIAL EQUIPMENT
There is an instruction that comes with the tempeh starter that I purchased, but I modified the instruction a little bit. I don’t have any special equipment, such as an incubator to culture the tempeh. I only have an oven to culture the tempeh. Now I have an Instant Pot too, I love the fact that I can use that to cook the soybeans in just 15 minutes and I can use it as an incubator to culture the tempeh. My favorite way is to put them in the turn-off oven with the light on and try to maintain the temperature between 90 – 95 F. If it gets above 95 F, I move them to the lowest rack of the oven and put some pan on the top rack to help “blocking” some heat.
FREQUENTLY ASKED QUESTIONS ABOUT TEMPEH
- HOW LONG TO CULTURE TEMPEH
The whole process may take up to 48 hours or a bit longer sometimes for fully cultured tempeh - BLACK SPOTS ON TEMPEH
If you see some black spots, DO NOT PANIC. It doesn’t mean that your tempeh is bad. In fact, those are actually the spores that also an indication that the fermentation of your tempeh is complete. The tempeh has matured. The tempeh will have a pleasant nutty fermented aroma. Many people in Indonesia like a black tempeh as a matter of fact. It has stronger aroma. - HOW TO KNOW IF TEMPEH HAS GONE BAD
Here are a few signs:
1. The tempeh is slimy and slippery to touch
2. It has very strong pungent ammonia-like smell and you see some pink or greenish spots on the tempeh. Gray or blackish spots are usually fine and doesn’t indicate the tempeh has gone bad
3. It doesn’t have a pleasant aroma at all - CAN I EAT RAW TEMPEH?
Even though the soybeans are cooked prior to making tempeh, during the fermentation process, these soybeans feed the tempeh starter and by the end of fermentation, what left are other nutrients and amino acids in the tempeh. So, to make a long story short, it is considered a “raw” food and it’s better not to eat raw tempeh - HOW TO STORE TEMPEH
Wrap them with a plastic wrap. Freeze them if you are not going to cook them anytime soon. It’s good up to 6 months in the freezer and about 3-4 days in the refrigerator
RECIPE IDEAS USING TEMPEH
Kering Tempeh Kacang (Spicy and Sweet Fried Tempeh and Peanuts)
Sambal Goreng Tempeh (Fried Tempeh in Spicy Sambal)
Tempeh Mendoan / Crispy Thin Fried Spiced Tempeh
Tahu dan Tempe Bacem (Braised Spiced Tofu and Tempeh)
Tempeh Fritters (Perkedel Tempeh)
Gulai Tempeh (Tempeh Stew)
How To Easily Make Tempeh at Home
Ingredients
- 400 gr dry soybeans or other beans of your choice about 2 cups, non-GMO or organic if possible
- 1 tsp tempeh starter (rhizopus oryzae or rhizopus oligosporus culture)
- 2 Tbsp white distilled vinegar
Equipments:
- hairdryer or 2-3 large tea or kitchen towel
- Thermometer
- Instant Pot or your kitchen oven
- 2 1-quart zipper bags or 4 1/2-quart zipper bags see notes
Instructions
- I got my tempeh starter from Cultures of Health and one packet (about 1 teaspoon) is good for 2 cups of soy beans and so that's the amount I used. Follow the recommendation of how much starter to use from the manufacturer
SOAKING:
- Place 2 cups of soy beans in a large pot. Pour cold water to cover the beans. Let it sit for at least 10 hours or up to 24 hours
DEHULLING:
- Drain off the water and fill with more fresh water and use your two hands to rub the soybeans as if you are washing your hands. This will rub off the skin off the soy beans.
- The skin will rise to the top of the water and scoop those skins away and pour off the water and fill up with fresh water and rub again. You may not be able to take off all the skin, but take off as much as you can, but there's no need to be obsessed about it
IF COOKING SOYBEANS ON THE STOVE:
- Place the dehulled beans back to the pot and fill up with 8 cups of water, bring to a boil and then lower the heat and cover the pot and cook for 1 hour. Just check on the water to make sure it doesn't run out while you are boiling it. Drain off the cooking water after the beans are soft and cooked through. Proceed to "dry the beans" step below
IF COOKING SOYBEANS WITH PRESSURE COOKER:
- Place the dehulled beans in the inner pot of Instant Pot. Fill up with 6 cups of water. Close the lid and turn the steam release valve to "sealing". Press "pressure cooker" and make sure it's on "high pressure". Set timer to 15 minutes and then wait 5 minutes before fully releasing the pressure
- Drain off the water. The soybeans should be soft and cooked through, but not mushy. Proceed to "dry the beans" step below
PREPARE BAGS AND CONTAINER TO CULTURE THE BEANS:
- While the beans are cooking, you can prepare two 1 quart-size zip lock bags or four 1/2 quart-size zip lock bags that are already poked with a toothpick on both sides (1-inch apart)
DRY THE BEANS:
- Spread two to three dry clean absorbent cloth on the kitchen counter or wherever with enough space. Spread the cooked beans on the cloth
- Use another dry towel to gently rub the beans to dry it. The beans need to be dry to touch. You can also use a hair dryer on cool heat to blow dry it. The temperature of the beans should be about 90-95 degrees.
MIX BEANS, STARTER, AND VINEGAR & FILL THE BAGS:
- Place the dried soybeans but still slightly warmed beans in a large bowl. Pour in 2 Tbsp of distilled white vinegar and sprinkle 1 packet (about 1 tsp) of the tempeh starter. Use a clean spatula to mix it around to make sure the beans are covered with the starter and vinegar
- Fill the bags with the beans, making sure you fill it to the corner but do not overpack it.
- It should be about 1 to 1 1/2-inches in thickness. Push all air out and seal the bags
IF YOU INCUBATE THE BEANS IN INSTANT POT :
- Put a trivet in the inner pot of Instant Pot. Gently put the bags on top of the trivet. Close the lid and press "Yogurt" button repeatedly until the light shows "less" mode and then set the timer to 14 hours. I set to 14 hours first to remind me to check on the beans and wipe off any condensation inside the lid & then continue to culture until about 48 hours using yogurt function
IF YOU INCUBATE THE BEANS IN THE OVEN:
- Place the bags of beans on a cooling rack set on top of a clean baking sheet and place them inside the oven. Place a thermometer inside the oven so you know the temperature. DO NOT turn on the oven. Just turn on the light and maintain a temperature between 90-95 F for optimal growth temperature
MONITOR THE GROWTH:
- I only start seeing a bit of growth starting at about 24-hour mark in my case when I use an oven as an incubator. The ones in Instant Pot starting to show some growth at around 20 hours. They started to grow rapidly after 24 hours. You will notice that the tempeh culture actually generates its own heat. This process may take up to 48 hours or it may not
- The tempeh is done when it covers with white spores all over and you can pick it up like a block without it breaking apart. It should be firm
- When you open the lid of Instant Pot to monitor the growth, use a clean paper towel to wipe off the condensation that accumulates on the lid before closing it back again, this way the water droplets won't drop on the tempeh
- If you see some black spots, DO NOT PANIC. It doesn't mean that your tempeh is bad. The tempeh should has nutty pleasant fermented aroma. If it smells foul, then the tempeh is most likely no good and you should discard it
- If you see red or greenish color mold and they smell bad, then you want to discard the tempeh for safety reason
- The whole process may take up to 48 hours or a bit longer sometimes for fully cultured tempeh
HOW TO STORE TEMPEH:
- Wrap them with a plastic wrap. Freeze them if you are not going to cook them anytime soon. It's good up to 6 months in the freezer and about 3-4 days in the refrigerator. Keep in mind that uncooked tempeh will continue to ferment in the fridge but at a slower rate. So, don't keep it in the fridge for more than 4 days if possible as the tempeh will over-ferment and spoil
COOK THE TEMPEH:
- Homemade tempeh shouldn't be eaten raw. I know we have cooked the soybeans prior to making the tempeh, but after the beneficial fungus/mold has grown, it is still safer to cook them before eating. I usually steam for 10 minutes. You can also put in boiling water for 5 minutes. Then you can bake it, grill it, pan fry it after that
14 comments
Can you culture longer than 48 hours. Not all of my beans have the white growth.
Hi Janne, yes you can try culture it a bit longer to see if more spores will grow and bind the beans together
Hi! Do I need to put 1 cup water into instant pot before incubate the tempe or not? Thank you
Hi Emy, no you don’t need to put any water in the instant pot for incubation.