How to Make Tofu From Scratch (Soy Milk to Block)

The first time I made tofu from scratch, I produced something with the structure of wet plaster. It tasted fine, but it fell apart the second my spatula touched it, and I stood over the sink genuinely annoyed that I had spent two hours making a worse version of the dollar block I could buy at the corner store.

I almost never tried again. I am glad I did, because the second batch was the thing that made it click: tofu is just curdled soy milk pressed into shape, the same way paneer is curdled dairy and the same logic as set cheese.

Once you stop treating it as mysterious, it becomes a Sunday-afternoon kind of project that you can actually get good at.

This is the full path from dried soybean to a block you can slice. I will be honest about where it goes wrong, because mine went wrong in every way that mine could, and the troubleshooting is where the real learning lives.

What you actually need before you start

You need dried soybeans, a coagulant, and a mold. That is the short list, and everything else is gear you probably already own.

For beans, buy plain dried yellow soybeans. They give the cleanest, most neutral milk. One cup of dried beans (about 200 grams) makes a modest block, roughly the size of a standard store package, so scale up if you want leftovers.

For the coagulant, you have three realistic choices: nigari (magnesium chloride), gypsum (calcium sulfate), or fresh lemon juice. I will get into the differences below, because that single choice changes the texture more than anything else you do.

For the mold, a real tofu press is nice but not required. I used a clean plastic takeout container with holes melted into the bottom for my first dozen batches, lined with cheesecloth. A small colander lined with cloth works too.

You also want a blender, a large pot, a fine strainer or nut milk bag, and a thermometer. The thermometer is the one piece I would not skip, because temperature is half the battle.

If you are unsure whether any of your ingredients are animal-free, you can run them through our vegan ingredient checker before you commit a whole afternoon.

Step one: make the soy milk

Photo: makafood / Pexels

Tofu is only as good as the milk it comes from, so this step matters. The technique is close cousin to making any plant milk at home, and our make-your-own plant milk guide walks the soak-blend-strain rhythm if you want extra detail, but here is the working version for soy.

Soak one cup of dried soybeans in plenty of cold water for 8 to 12 hours, or overnight, until they double in size and split easily when you press one. Drain and rinse them well, rubbing off any loose skins, which makes for a cleaner flavor.

Blend the soaked beans with 6 cups (about 1.4 liters) of fresh cold water on high for around 90 seconds, until you have a thick, frothy slurry with no whole beans left. Work in batches if your blender is small.

Strain the slurry through a nut milk bag or a few layers of cheesecloth into a large bowl, squeezing firmly until only damp pulp (called okara) stays behind. Do not throw the okara out; it freezes well and goes into veggie burgers and crackers.

Now cook the milk. This is not optional with soy. Pour the raw milk into a deep, wide pot and bring it to a real boil over medium heat, stirring constantly, because it foams up violently.

Once it foams, lower the heat and hold a steady simmer for about 20 minutes, stirring often and skimming any skin. Raw soybeans contain compounds that upset your stomach, and the boil both cooks those out and kills the beany, grassy taste.

If your milk smells raw and green, you pulled it off the heat too soon.

Step two: choose your coagulant

This is the fork in the road, and it deserves its own section because nobody told me how much it mattered.

A coagulant is just something that nudges the dissolved soy proteins to clump together and trap water, the same way an acid or rennet sets cheese. The classic mineral coagulants are nigari and gypsum. The kitchen-cupboard option is acid, usually lemon juice.

According to the history of tofu, mineral salts have been used for this for well over a thousand years, so you are in good company either way.

Nigari (magnesium chloride) makes the firm, springy tofu you recognize from Japanese cooking. It works fast and gives a clean, slightly sweet taste. Because it acts quickly, it is also the easiest to overshoot, which is exactly how I got my plaster block.

Dissolve about 1 teaspoon in half a cup of warm water for one batch.

Gypsum (calcium sulfate) is the Chinese-style standard and my pick for beginners. It works slowly and evenly, the curd is softer and silkier, and it is genuinely hard to ruin because you have time to react. It also adds calcium, which is a quiet nutritional bonus.

Use about 1 to 2 teaspoons dissolved in half a cup of water.

Lemon juice needs nothing from a specialty shop. The curd is finer, the tofu is a little softer and faintly tangy, and the yield is slightly lower. Use about 4 to 6 tablespoons of fresh juice, diluted in half a cup of water.

If you want to know more about the ingredient itself, our substitutes hub covers acid swaps for setting and curdling.

Step three: curdle the milk

Photo: Leongsan Tung / Pexels

Here is where patience beats enthusiasm, and where my first batch died.

Let the boiled milk cool to between 75 and 80 C (167 to 176 F). Too hot and you get a tough, grainy curd; too cool and it barely sets. The thermometer earns its place right here.

Stir your dissolved coagulant one more time so nothing settled. Now add it in thirds, not all at once. Pour in the first third, give the milk two or three slow, gentle folds with a spoon or spatula, and stop.

The instinct to whisk is the enemy. Wait a few seconds and you will see soft white clouds of curd separating from a pale yellow whey. Add the second third, fold once or twice, wait.

Add the last third, fold, then leave the pot completely alone, covered, for about 15 minutes.

When it is ready, the curds will float in a clearish yellow whey rather than milky liquid. If the liquid still looks white and cloudy, the milk did not fully curdle, and you can warm it gently and add a splash more dissolved coagulant.

If the curds are tiny and the whey is grayish and the texture looks broken, you used too much or stirred too hard. Either way, you will get usable tofu; it is the difference between a smooth block and a rustic one.

Step four: press it into a block

Line your mold with cheesecloth, leaving plenty of overhang. Set it over a bowl or in the sink to catch the whey.

Gently ladle the curds into the lined mold. Take it slow, because ladling carefully keeps the block dense and even. Fold the cloth over the top, set a small plate or the press lid on, and add weight.

A can of beans or a jar of water works fine.

Press time controls firmness, and this is the lever most people miss:

• Silken to soft: 10 to 15 minutes of light weight, or skip pressing and let it set in a smaller mold. This is delicate, spoonable, and lovely in soups.
• Medium: 20 to 30 minutes with moderate weight. Slices but stays tender.
• Firm to extra-firm: 45 to 60 minutes with heavier weight. This is the one you want for stir-fries, grilling, and frying.

Unmold gently and drop the block into a bowl of cold water to firm up and cool for 15 minutes. That cold-water bath is also how you store it.

Once you have a finished block, our guide on how to cook tofu and the deep dive on how to press tofu cover what to do next, and freezing it first gives an even chewier bite.

Firm versus silken: it is mostly water

People assume silken and firm tofu are different products. They are mostly the same curds at different water contents. Silken tofu is set with less coagulant and barely pressed, often set right in its serving container, so it holds more water and stays custardy.

Firm tofu is the same curd pressed harder and longer until the water leaves and the proteins pack tight.

That means you control the spectrum from one pot of milk. Want silken for a chocolate mousse or a creamy dressing? Set it soft and skip the press.

Want a block that takes a hard sear without falling apart? Press it under real weight for an hour. I usually split a batch, setting half soft for breakfast and pressing half firm for dinner, which is something you simply cannot do with a sealed store package.

Troubleshooting: every way mine failed

Mine failed in all of these ways, so learn from my bad afternoons.

Crumbly, holey, dry block. Too much coagulant, stirring too hard, or milk too hot. Curds shocked into existence squeeze out their water and leave gaps. Use less coagulant, fold gently, hold 75 to 80 C.

Milk never sets, stays milky. Not enough coagulant, milk too cool, or milk too thin. Reheat gently and add a little more dissolved coagulant in stages. Make sure your milk was thick to begin with.

Sour or off smell. Old beans or under-cooked milk. Boil a full 20 minutes and use beans within their first year. Always store the finished block submerged in fresh water you change daily.

Bitter or chalky aftertaste. Usually too much nigari or gypsum left in the curd. A longer cold-water soak after pressing rinses the excess minerals out and rounds the flavor.

Bland tofu. That is not a defect, it is the point. Plain tofu is a blank canvas. The fix is a good marinade and a hot pan, not more coagulant.

Is it actually worth making from scratch?

I will be straight with you, because I hate guides that pretend everything is magic. On money and time, store-bought wins. A package of House Foods, Nasoya, or Mori-Nu costs little and saves you two hours.

If your goal is cheap weeknight protein, buy the block and put your energy into cooking it well. Tofu is one of the cleanest plant proteins you can keep on hand, and you can confirm any brand fast in our Is It Vegan database.

So why make it? Three honest reasons. Control, because you set the exact firmness and coagulant.

Freshness, because warm tofu eaten the same day has a sweet, delicate taste the cold packaged stuff never matches. And the simple satisfaction of understanding a food you eat constantly.

For the full picture on types, nutrition, and buying, our complete guide to tofu is the companion piece to this one.

Make it once for the knowledge. If you love the result, keep gypsum and a press in the cupboard and make it on slow weekends.

If you decide the packaged block was good enough all along, you have lost one afternoon and gained the ability to never be intimidated by tofu again. That trade is worth it, and it is the reason I stopped throwing batches in the sink.