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How to make Silken Tofu with soy beans and lemon juice

Easy DIY Silken Tofu from scratch! This tutorial will show you how to make the ideal soy milk for tofu-making from dry soybeans and how to turn your homemade soy milk into silken tofu, also known as smooth tofu. You won’t have to go out to find special coagulants either; you can make silken tofu with just soy milk and lemon juice! It doesn’t taste like lemons. Instead, this homemade silken tofu is mild and delicate; a protein-rich canvas for flavours you choose. If you’re ready to go a step further, find food grade calcium sulfate to make even silkier, smoother silken tofu. Either way, fresh made silken tofu is a treat to have both savoury or sweet. Click here for the printable recipe.

Video tutorial on How to Make Silken Tofu with Soymilk and Lemon Juice or Gypsum

 
I am not a tofu making master, but I do like making tofu for myself! A while ago, the store where I would find the best prices for tofu raised their prices by 25%! That was too much for me so I started making more tofu, more often. There are different ways of making tofu. In this tofu tutorial, we’ll make silken tofu with soybeans, lemon juice or gypsum, and set it by steaming.

By the way, you can use other coagulants which yield different textures and slightly different tastes. My video tutorial demonstrates how to make silken tofu with lemon juice or gypsum (calcium sulfate). I’ve read that you can also use magnesium chloride, nigiri, and even Epsom salts.

Silken Tofu VS Regular Tofu
For the sake of simplicity, I’ll call the tofu commonly used in Western vegetarian and vegan cooking “regular tofu.” It usually comes in 12oz water-filled tubs or vacuum-packed plastic labelled as medium, firm, extra firm, and pressed varieties. To make regular tofu, soy milk is coagulated, then the curds and whey are separated. The curds are pressed into moulds. The amount of water pressed out of the curds determine if the tofu will be soft, medium, firm or extra firm. This results in a sort of sponge-like texture (it’s better than it sounds!). Pressed varieties are pressed so well that the texture seems smooth and solid like a block of deli meat like this smoked tofu. The blocks are more solid than silken tofu and can hold their shape better in stir-fries, stews, and more. You’ll find them vacuum packed in plastic or in tubs filled with water. Click here to learn how to make regular tofu.

Store-bought silken tofu also comes in soft, medium and firm varieties but they are all more delicate than regular tofu. The firmer ones have more protein in them. Silken tofu is also known as smooth tofu, tofu pudding, or doufufa (or doufa for short). This is the type of tofu used for Chinese desserts with simple syrups. In China (especially in Northern regions), it’s served for breakfast with soy sauce, black vinegar, and chilli oil along with Chinese crullers/doughnuts. It’s also the tofu used in Mapo Tofu. I also love this tofu for making egg-like tofu scrambles like in my Soy Sauce Tofu Scramble recipe. There are a few different ways of making silken tofu, but I’m keeping it simple by simply mixing coagulant with soy milk and steaming it.

Soy milk for making silken tofu

The key to great silken tofu is great soy milk. Homemade is best since it doesn’t have additives and can give you the largest yield. I have tested with a store-bought soy milk brand and was impressed that it worked…somewhat. Watch the video to see what happened when I tried using store-bought soy milk and almond milk. The result with store-bought soy milk was a much smaller yield and the texture was not as nice, but it wasn’t too bad. So if you really want to experiment, I say go for it! Start with small one-cup batches so you’re not wasting much if it goes south. Look for a brand that has the most protein and fat content because that’s what will make up the tofu solids.

Homemade soy milk is pretty simple to make. But it does take some time. If you’re a regular reader, you may know I already have two soy milk tutorials on this blog: this older one, and this newer one. The newer recipe skips soaking the dried beans; instead, they are boiled for a minute. However, I’ve gotten more complaints about this recipe. It seems that many people aren’t able to get a rich enough soy milk out of this method. Rich soy milk is key to getting a nice rich silken tofu with a higher volume yield. That’s why I recommend using the older method specifically for making tofu; both for this silken tofu and regular block-style tofu.

This ‘old school’ method of making soy milk is simple and it starts with the beans. Choose mature soybeans (yellow not green). They come dried like other beans. Good quality beans will be uniform in colour. Some are light yellow, some are deeper yellow. There are even black soybeans, though I haven’t seen them IRL. As with most foods, fresher beans are better beans. Choose beans that are smooth-skinned. Avoid beans that look very wrinkled or have a rancid or strong smell.

Where can you find dried soybeans? Generally, you can find them at Asian grocery stores, health food stores and occasionally at major chain grocery stores. I’m in Calgary, Alberta (not a huge city, not a small town), and have found soybeans at Superstore, Bulk Barn, T&T Supermarket. I’ve also seen a few sources online but haven’t bought from them yet. I’ll add more sources to this section if/when I find them.

On hot summer days, I’ve had soybeans fully hydrate in a little as four hours on the countertop. However, my food safety training tells me the safest way is soaking them in the fridge. In this case, it will take about 12 hours. If you find yourself too busy with other stuff after 12 hours, don’t worry. You can leave those beans soaking in the fridge for about 3 days. After that, if you still need to put it off, drain the beans, put them in a freezer bag, squeeze out all the air and freeze them. They will last a month or two. Just let them thaw before going on to the next step.
When fully hydrated, the beans will have expanded to about triple in size and taken on an oblong bean shape. Discard the soaking water and then blend the beans with new fresh water. For every cup of beans you started out with, add five cups of water. If everything doesn’t fit in your blender at once, divide it up into smaller portions. Just keep the water/bean ratio in mind.

My high powered blender has the capacity to do a whole batch and took only about 30 seconds on the highest setting to break the beans down into the consistency we’re going for. When I use my regular powered conventional blender, it needs to be done in half batches and takes about a minute to a minute and a half on the highest setting each time. Either way, you want the soybean bits to be pretty tiny so we can get as much protein and fat out of the beans and into the milk as possible. But if they are too processed, it will be very difficult to strain. It’s a bit of a balancing act.

Next, it’s time to strain. I use a jelly or nut milk bag for this job; they’re the best! You can probably use a fine mesh sieve or improvise with layers of cheesecloth or muslin. Be careful that you don’t squeeze so hard that you break your bag and get pulp in your milk. I’ve done that before; it’s not fun. Instead, move the pulp around in there so you can squeeze different sections. The milk should feel creamy as it flows over your hands. Is it an Ancient spa treatment of some kind? Maybe. Kind of feels like it. If the milk feels watery and looks thin, that’s a sign that the beans were not blended enough.

When you’re done, the pulp, also known as okara, tofu dregs, or dòuzhā or dou jai should be fairly dry. Look at the size of the pieces for evidence that you blended it well enough. If you think you didn’t go far enough, you can re-blend it with the milk and strain again to make thicker milk.

container of tofu pulp

Save your tofu pulp (okara) for Okara Sea Burgers!

Once you have your strained raw soy milk, transfer to a big pot to cook it. You should not drink raw soy milk. Just like you shouldn’t eat raw soybeans or other beans. First of all, ew that would taste nasty. And second, it’s simply not digestible that way for humans. But all we need to do it bring it to a boil and let it simmer for ten minutes.

Then, let this milk cool down. You can use an ice bath to speed things up. This method of making silken tofu starts with soy milk that isn’t hot; cold, cool, room temperature or slightly warm soy milk will work.

Making silken tofu with homemade soy milk

Supplies and Equipment
Silken tofu requires soy milk and a coagulant. As mentioned before, this recipe uses either lemon juice or calcium sulfate. Calcium sulfate is also known as gypsum. Yup, that’s the stuff they use for drywall. But don’t head to your local hardware store. Make sure to use the food grade kind. You can find it at wine and beer making supply store or online. This is my coagulant of choice because it’s super inexpensive and produces a smoother tofu. I also like using it for making regular block-style tofu.

a little gypsum and lemon juice in jars

I like using lemon juice too because it’s easy to find in any grocery store. I’ve also used it for making regular tofu. I was surprised to find that bottled lemon juice is just as good as fresh. In some ways, it’s better because they make the bottled stuff really consistent in acidity. Whereas some lemons just aren’t that sour and aren’t acidic enough for making tofu. You can try other coagulants which yield different textures and slightly different tastes. I haven’t tried them myself though.

As for equipment, you’ll need a heat-proof container (or a number of smaller ones) to steam your silken tofu in and a steaming apparatus of some kind. If you decide to use glass for steaming, be extra careful. Preheat the glass with warm water and make sure the milk is at room temperature or a bit more on the warm side; otherwise, you risk glass cracking once you stick it in the hot steamer. I broke two mason jars while I was recipe testing. I love my little steamer set that makes steaming anything simple and easy. But if you don’t have a set up like this, there are alternatives. For example, you can use a heat-proof bowl set on a rack in a big pot of water with a lid. I did that when I was steaming a bunch of Paprika Seitan Sausages.

The Process
In the video tutorial, I make one cup servings at a time. However, you can make bigger batches at once.

If you’re using gypsum, use 1/4 teaspoon of firmly packed gypsum for every cup of soy milk for soft silken tofu. I like to measure the gypsum directly into the container. Then add a little bit of soy milk and mix so that that gypsum dissolves completely and there are no lumps. Finally, I pour in the rest of the soy milk. The gypsum needs heat to activate so you won’t see much of a change in the soy milk at this point.

Alternatively, you can mix all the gypsum and soy milk in a pitcher, then pour the mixture into your container(s) of choice.

If you’re using lemon juice, use 1 teaspoon of juice for every cup of soy milk. I measure the lemon juice directly into the container and then add soy milk. The soy milk will start to curdle right away.

Slightly curdled soy milk

The soy milk starts to curdle immediately when lemon juice is added.

Steam over medium-high heat for 10 minutes to set the silken tofu. Then you can remove the steamer from the water and let your fresh silken tofu rest and get a little firmer for ten minutes. You can serve the tofu hot or let it cool down further so you can store it in the fridge. It will keep in the fridge for a couple days.

Fresh silken tofu should have a very mild flavour and smooth texture. Perfect to add simple seasonings so all your ingredients stand out.

Short mason jar of steamed silken tofu

Steamed silken tofu made with lemon juice.

Try silken tofu with a bit of dark soy sauce, Chinese black vinegar, and scallions. Add a bit of chilli oil for a kick and sesame seeds for crunch if you have them. I need to get restocked on those.

jar of steamed silken tofu

Silken tofu made with gypsum has a smoother look and is set as one solid piece.

My simple Soy Sauce Tofu Scramble is really good with silken tofu too. The chunky texture of lemon-curdled silken tofu is the perfect dupe for scrambled eggs. Or try pieces of silken tofu in simple syrup or condensed milk. I used to have that as a kid. Let me know what you do with silken tofu in the comments!

yellow silken tofu scramble

Printable Recipe for Silken Tofu – US

Silken Tofu - US
Yields 5
Fresh made silken tofu is a treat to have both savory or sweet. Learn how to make silken tofu from scratch using soy beans and lemon juice. It doesn't taste like lemons. Instead, this homemade silken tofu is mild and delicate; a blank protein-rich canvas for the flavours that you choose. This recipe also includes instructions if you want to use calcium sulfate for a smoother textured silken tofu. Food grade calcium sulfate, also known as gypsum, can be found at beer and wine making supply stores.
The soy beans need to be soaked, so start this recipe a day ahead.
This recipe uses US measurements. Click here for metric amounts.
Write a review
Print
Prep Time
12 hr
Cook Time
15 min
Total Time
13 hr
Prep Time
12 hr
Cook Time
15 min
Total Time
13 hr
For soy milk
  1. 1 cup dried soy beans
  2. 5 cups water + more for soaking
For silken tofu made with lemon juice
  1. 1 tablespoon + 2 teaspoons lemon juice (1 teaspoon for every cup of soy milk)
For silken tofu made with gypsum
  1. 1 1/4 teaspoons food grade gypsum - calcium sulfate (1/4 teaspoon for every cup of soy milk)
To make the soy milk
  1. Soak the beans in water until they fully hydrate. This will take about 12 hours in the fridge. Make sure there is enough room for the beans to expand to triple their size. Add water if the water level drops below the top of the beans.
  2. Drain the beans and blend the beans with 5 cups of water until the beans well pureed. In a large capacity high speed blender, this should take about one minute. In a conventional blender, you may have to separate into two batches and blend on the highest setting for one to one and a half minutes each time. Since blenders vary, keep a close eye. You want to process enough to get the maximum amount of milk from the beans, but not so much that it becomes very difficult to strain the milk out.
  3. Strain the liquid into a large pot using a nut milk bag, jelly bag or several layers of cheesecloth over a colander or sieve. The liquid will be your soy milk. Squeeze the pulp until very dry. The pulp, known as okara, can be composted or used in other recipes such as my Okara Sea Burgers.
  4. Heat the milk on high heat until boiling while stirring regularly. The milk tends to form a skin at the bottom of the pot so stirring is necessary to keep this from building up. During this process, a skin may form at the top; this is normal and known as yuba. The yuba can be stirred back into the milk or skimmed off.
  5. Once the milk is boiling, turn down the heat to a simmer. Let the soy milk cook for 10 minutes and you soy milk is done. Remove it from heat and let it cool. This method of making silken tofu uses cold, cool, room temperature or just slightly warm soy milk. You may use an ice bath to speed things up.
To make silken tofu
  1. Strain your cooled soy milk to get rid of any leftover pulp or pieces of yuba.
  2. Ready your steaming apparatus; get the water boiling, then turn to medium high for a steady hot steam. If you don't have a proper steamer, there are options. For example, you can use a heat-proof bowl set on a rack in a big pot of water with a lid.
  3. If using lemon juice, note the ratio of lemon juice to soy milk (1 teaspoon : 1 cup). Measure the lemon juice into heat-proof containers that will fit into your steamer. Pour the strained soy milk directly into the containers. Place the containers in the steamer to cook for 10 minutes. Afterwards, remove from heat and let rest for 10 minutes. Then you can serve or let cool further and store in the fridge for up to three days.
  4. If using gypsum, note the ratio of gypsum to soy milk (1/4 teaspoon, packed : 1 cup). You can measure the gypsum directly into a large pitcher, add a little soy milk, and mix well so all the gypsum is dissolved. Add the soy milk and stir well before pouring into containers. Alternatively, measure the gypsum directly into containers, add a bit of soy milk and mix to dissolve, then top off with the rest of the soy milk. Place the containers in the steamer to cook for 10 minutes. Afterwards, remove from heat and let rest for 10 minutes. Then you can serve or let cool further and store in the fridge for up to three days.
Notes
  1. Caution!! If you're using glass containers, be very careful. Pre-heat the containers by swirling a little hot water in them, then empty. Also make sure the soy milk is at room temperature or slightly warm but not hot. Otherwise, the glass may crack when you set them over the hot steam.
  2. Other coagulants may be used such as magnesium chloride, nigiri, and Epsom salts. However the measurements may vary.
  3. Store-bought milks do not give the best results. However, if you want to observe how the process works, you can try with plain soy milk. Look for a brand with high protein and fat content. See my video to see what happened when I tried to use store-bought milk here.
Mary's Test Kitchen http://www.marystestkitchen.com/

Printable Recipe for Silken Tofu – Metric

Silken Tofu - Metric
Fresh made silken tofu is a treat to have both savory or sweet. Learn how to make silken tofu from scratch using soy beans and lemon juice. It doesn't taste like lemons. Instead, this homemade silken tofu is mild and delicate; a blank protein-rich canvas for the flavours that you choose. This recipe also includes instructions if you want to use calcium sulfate for a smoother textured silken tofu. Food grade calcium sulfate, also known as gypsum, can be found at beer and wine making supply stores.
The soy beans need to be soaked, so start this recipe a day ahead.
This recipe uses US measurements. Click here for metric amounts.
Write a review
Print
For soy milk
  1. 250ml dried soy beans
  2. 1250ml water + more for soaking
For silken tofu made with lemon juice
  1. 25ml lemon juice (5ml for every cup of soy milk)
For silken tofu made with gypsum
  1. 6.25ml food grade gypsum - calcium sulfate (1.25ml for every cup of soy milk)
To make the soy milk
  1. Soak the beans in water until they fully hydrate. This will take about 12 hours in the fridge. Make sure there is enough room for the beans to expand to triple their size. Add water if the water level drops below the top of the beans.
  2. Drain the beans and blend the beans with 5 cups of water until the beans well pureed. In a large capacity high speed blender, this should take about one minute. In a conventional blender, you may have to separate into two batches and blend on the highest setting for one to one and a half minutes each time. Since blenders vary, keep a close eye. You want to process enough to get the maximum amount of milk from the beans, but not so much that it becomes very difficult to strain the milk out.
  3. Strain the liquid into a large pot using a nut milk bag, jelly bag or several layers of cheesecloth over a colander or sieve. The liquid will be your soy milk. Squeeze the pulp until very dry. The pulp, known as okara, can be composted or used in other recipes such as my Okara Sea Burgers.
  4. Heat the milk on high heat until boiling while stirring regularly. The milk tends to form a skin at the bottom of the pot so stirring is necessary to keep this from building up. During this process, a skin may form at the top; this is normal and known as yuba. The yuba can be stirred back into the milk or skimmed off.
  5. Once the milk is boiling, turn down the heat to a simmer. Let the soy milk cook for 10 minutes and you soy milk is done. Remove it from heat and let it cool. This method of making silken tofu uses cold, cool, room temperature or just slightly warm soy milk. You may use an ice bath to speed things up.
To make silken tofu
  1. Strain your cooled soy milk to get rid of any leftover pulp or pieces of yuba.
  2. Ready your steaming apparatus; get the water boiling, then turn to medium high for a steady hot steam. If you don't have a proper steamer, there are options. For example, you can use a heat-proof bowl set on a rack in a big pot of water with a lid.
  3. If using lemon juice, note the ratio of lemon juice to soy milk (5ml : 250ml / 1 teasoon : 1 cup). Measure the lemon juice into heat-proof containers that will fit into your steamer. Pour the strained soy milk directly into the containers. Place the containers in the steamer to cook for 10 minutes. Afterwards, remove from heat and let rest for 10 minutes. Then you can serve or let cool further and store in the fridge for up to three days.
  4. If using gypsum, note the ratio of gypsum to soy milk (1.25ml, packed : 250ml / 1/4 teaspoon : 1 cup). You can measure the gypsum directly into a large pitcher, add a little soy milk, and mix well so all the gypsum is dissolved. Add the soy milk and stir well before pouring into containers. Alternatively, measure the gypsum directly into containers, add a bit of soy milk and mix to dissolve, then top off with the rest of the soy milk. Place the containers in the steamer to cook for 10 minutes. Afterwards, remove from heat and let rest for 10 minutes. Then you can serve or let cool further and store in the fridge for up to three days.
Notes
  1. Caution!! If you're using glass containers, be very careful. Pre-heat the containers by swirling a little hot water in them, then empty. Also make sure the soy milk is at room temperature or slightly warm but not hot. Otherwise, the glass may crack when you set them over the hot steam.
  2. Other coagulants may be used such as magnesium chloride, nigiri, and Epsom salts. However the measurements may vary.
  3. Store-bought milks do not give the best results. However, if you want to observe how the process works, you can try with plain soy milk. Look for a brand with high protein and fat content. See my video to see what happened when I tried to use store-bought milk here.
Mary's Test Kitchen http://www.marystestkitchen.com/

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