Vegan Soba Noodle & Tofu Salad with Miso Dressing

Veganuary is as good a reason as any, and this soba noodle and tofu salad is a quick, light meal packed with Japanese-inspired flavour. It comes together in about 30 minutes, so it is handy for lunch, dinner, or meal prep.

If you have never cooked soba before, do give it a go. The noodles are made from buckwheat, with a nutty flavour and a chewy bite that sets them apart from regular pasta.

Here they meet crispy soy-glazed tofu and fresh veg, all coated in a creamy miso dressing. For a warm noodle bowl another day, try my Traditional Wuhan Hot Dry Noodles.

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What Are Soba Noodles?

Soba are Japanese noodles made from buckwheat, and buckwheat is not a grain at all - it is a seed, related to rhubarb and sorrel. That is where the nutty flavour and the slightly chewy bite come from, and it is why they carry more protein than most noodles.

Most soba is not gluten-free, and this is worth being clear about. Buckwheat proteins cannot form gluten, so an all-buckwheat noodle barely holds itself together; almost all commercial soba is cut with wheat flour to give it something to hold on to. A packet can be anywhere from a tenth to nine tenths buckwheat, and nothing on the front of it will tell you which. Only juwari soba is 100 per cent buckwheat, and if you are cooking for coeliac disease you want one that is certified gluten-free as well, because shared production lines are the other half of the problem.

One practical consequence, if you do buy juwari: with no gluten in it there is very little holding the noodle together, so it is fragile and it breaks up when you toss it with a dressing. Rinse it especially gently and fold rather than stir.

Why Soba Turns Gluey, and How to Stop It

This is the one thing that goes wrong with a cold soba salad, and it is worth understanding rather than just following, because the fix is not the one most packets suggest.

• The problem is surface starch, not the cooking time As the noodles drain and cool, the starch on their surface dries and sets into a gluey film that welds them into a single block. Temperature is not doing it and the clock is not doing it - the starch is. So the answer is to physically wash it off rather than to cook them for less time and hope.
• Rinse them hard, with your hands The moment they are drained, get them under cold running water and rub the noodles between your fingers until the water runs clear. A passive rinse leaves the film in place. This is the single most repeated piece of advice from people who cook this dish, and it is the step most recipes describe far too gently.
• Undercook them by half a minute The time on the packet is written for hot soba eaten straight away, not for noodles that will be tossed in a dressing and left to sit. Take them out about thirty seconds early and they will still have bite in the finished salad.
• A spoon of oil through the drained noodles If you are not assembling immediately, toss the rinsed noodles with a little oil. It keeps them separate while you deal with everything else, and it is the same principle - give the surfaces something other than each other to touch.
• Stir them for the first minute in the pot Sticking during cooking is a different fault. Noodles dropped in and left to settle absorb the water between them and glue together before they have started to soften. A stir for the first minute, in plenty of water, prevents it.

Which Miso to Use

The card asks for 30 g of miso paste and does not name a type, so here is the answer. White miso, shiro, is the one to buy for this. It is fermented for a shorter time with a higher proportion of rice, so it is pale, mild and slightly sweet, and it sits happily behind the peanut butter and the sweet chilli.

Red miso, aka, is fermented longer and is much saltier and more assertive. It is not wrong, but at 30 g in a dressing this size it takes over, so start with about 20 g and taste. Awase is a blend of the two and lands somewhere in between. Any of them keeps for months in the fridge once opened, which is worth knowing before you buy a tub for one salad.

A Closer Look at the Ingredients

• Soba noodles 170 g dry, which is a modest portion by weight because they swell. See above on the buckwheat percentage and what it means for gluten.
• Extra-firm tofu It has to be extra-firm. Softer tofu will not survive being seared, glazed and then cut, and it is the searing that gives the salad something to chew on. Smoked tofu is an excellent alternative and needs no glaze at all.
• Sweet soy sauce Thicker and sweeter than ordinary soy, so it clings to the tofu and caramelises rather than running off it. If you cannot find it, stir a little sweet chilli sauce or honey into regular soy.
• Mangetout, carrot, red pepper and spring onion The mangetout gets 90 seconds in a hot pan and everything else goes in raw. That is a deliberate middle position: the mangetout loses its squeakiness and keeps its snap, while the rest stays crisp and bright.
• Miso paste White miso, 30 g. The savoury backbone of the dressing.
• Peanut butter Only 10 g, and it is doing texture rather than flavour - it is what makes the dressing creamy enough to coat a noodle. Tahini works identically and makes the whole thing nut-free.
• Sweet chilli sauce One ingredient carrying both the sweetness and the heat, which is why this dressing has a shorter list than most. No sugar, no honey, no chilli flakes needed.
• Lime Half a lime, and it is the only acid in the dressing. Most miso dressings also carry rice vinegar; this one does not, and it is milder for it.

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Equipment You’ll Need

Barely any kit for this one, though pan size matters.

Ingredient Substitutions

• Any crunchy vegetable for the mangetout Sugar snap peas, tenderstem, edamame or thinly shredded red cabbage all work. Cucumber and baby spinach go in raw with no cooking at all.
• Tahini for the peanut butter A straight swap at the same weight, and it makes the dressing nut-free. Sunflower seed butter does the same job.
• Smoked tofu for the glazed tofu Cube it straight from the packet and skip the searing and the sweet soy entirely. It is the fastest version of this salad.
• Regular soy for the sweet soy Use less of it and stir in a spoonful of sweet chilli sauce or honey, or the glaze will be salty rather than sticky.
• Rice noodles or udon for the soba Both work, though you lose the nutty flavour that makes this taste the way it does. Rinse them just as hard.
• Not vegan Seared salmon, smoked salmon or a piece of seared tuna sit very well on top of this, in place of the tofu or alongside it.

How to Make Soba Noodle Salad, Step by Step

Half an hour, and the only part that needs your attention is the noodles.

1. Cook and rinse the soba. Plenty of water in a large pot, and stir them for the first minute. Take them out about thirty seconds before the packet time. Drain, then get them under cold running water and rub them between your fingers until the water runs clear. Drain well and leave covered, tossed with a spoonful of oil if you are not putting it together straight away.Stirring stops them settling against each other and gluing together before they soften. They come out early because they are going into a dressing, not straight onto a plate. Rubbing washes off the surface starch, and a quick rinse leaves it there to set into a gluey block as they cool.
2. Sear the tofu in slabs, then glaze it. Cut the block lengthways into five slices, not cubes. Get the oil properly hot in a wide pan and sear the slices on each side until golden, leaving them alone. Then turn the heat down before the sweet soy goes in. Turn the slices to coat both sides, let it go sticky but not dark, and lift them out. Cool completely, then cut into 1 cm cubes.Slabs give you flat faces that meet the pan. Cubes break up in a sticky pan and give the glaze less to catch on. The sweet soy is sugary and burns in seconds over a high flame. Cutting afterwards gives glazed faces and clean insides, which is much better eating than cubes glazed all over.
3. Stir-fry the mangetout for 90 seconds. A hot pan, a tablespoon of oil, and no longer than that. Tip them onto a plate to cool. The carrot, the pepper and the spring onion all go in raw.You want the raw squeak gone and the snap still there. Left in the pan they keep cooking and go limp.
4. Make the dressing, miso first. Work the miso and the peanut butter together into a smooth paste before any liquid goes near them, then loosen it with the sweet chilli, lime and oil a little at a time. A small blender or a jam jar shaken hard works too. Taste it: savoury first, sweet second, sharp last.Miso is stiff, and tipped straight into liquid it sits there in lumps that no amount of whisking will break up.
5. Toss it all together and garnish. Noodles, tofu, mangetout and raw vegetables into a big bowl, then the dressing. Lift it through with your hands or two forks, do not stir it. Toasted sesame seeds over the top. Eat it cool or at room temperature.Stirring tears the noodles. It is better after ten minutes sitting than it is straight away.

Recipe Card for Soba Noodle and Tofu Salad

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🍽 What to serve it with: it is a complete meal as it stands, but it also works as a side beside something grilled. The dressing is the part people come back for, and it is worth making double - it goes on any cold noodle, on roasted broccoli or cauliflower, over a grain bowl, or as a dip for raw vegetables. For a warm noodle bowl another day, try my Wuhan Hot Dry Noodles, and for a portable Japanese lunch there is my onigirazu.

Storing and Making Ahead

Keep the dressing separate if you can. Dressed, the salad keeps two to three days in the fridge, but the noodles drink the dressing from day two and it tastes drier each day. Undressed, the components hold for three to four days and it is as good on day three as it was on day one.

To revive leftovers, toss them with a splash of oil and a squeeze of lime. That is usually all it needs. If you made extra dressing, a spoonful through it does the same job better.

Freezing does not work, and it is worth saying plainly. Cooked soba comes back from the freezer soft and broken, and the raw vegetables come back limp.

FAQ for Soba Noodle Salad

Are soba noodles gluten-free?

Usually not. Buckwheat itself contains no gluten, but buckwheat cannot form a dough on its own, so nearly all commercial soba is cut with wheat flour - anywhere from a tenth to nine tenths buckwheat depending on the brand. Only juwari soba is 100 per cent buckwheat, and for coeliac disease you also want a certified gluten-free packet, because of shared production lines.

Why do my soba noodles go gluey?

Surface starch. As they drain and cool it dries into a film that glues them together. Rinse them under cold running water the moment they are drained and rub them between your fingers until the water runs clear, rather than letting the tap run over them. Undercooking by about thirty seconds helps too.

Should the vegetables be cooked or raw?

Only the mangetout is cooked, and only for 90 seconds. The carrot, red pepper and spring onion all go in raw, which is what keeps the salad crisp and bright.

Which miso should I use?

White miso, sometimes sold as shiro. It is mild and slightly sweet and sits behind the other flavours. Red miso is much saltier and will take over at this quantity - if it is what you have, use about 20 g rather than 30 g and taste as you go.

Can I make the dressing nut-free?

Yes. Swap the peanut butter for tahini at the same weight. It is only 10 g and it is there for texture rather than flavour, so the dressing tastes much the same.

My dressing is lumpy. What went wrong?

The miso went in with the liquids. Work the miso and the peanut butter into a smooth paste first, then let the sweet chilli, lime and oil down into it gradually. A small blender or a jam jar shaken hard fixes it either way.

Can I make it ahead of time?

Yes, and it is good meal-prep food. Keep the dressing in a separate jar and toss it through just before eating; the components hold for three to four days that way. Dressed, it keeps two to three days but the noodles absorb the dressing and it dries out.

Can I serve it warm?

It is designed to be eaten cool or at room temperature and that is where it is at its best. There is nothing stopping you eating it warm, though the dressing thins and the vegetables lose their crunch.

Why is the tofu sticky rather than crisp?

Because it is glazed rather than fried dry - the sweet soy caramelises onto the surface, and that stickiness is the point. If you want crisp tofu instead, skip the glaze, dredge the cubes in a little cornflour and fry or air-fry them until they are properly crunchy, then add them at the end so the dressing does not soften them.

Can I use a different protein?

Yes. Smoked tofu needs no cooking at all, tempeh works, and edamame adds protein without anything to cook. It is titled vegan, but seared salmon or tuna on top is very good if you are not.

What else can I use the dressing on?

It is the best thing in the recipe and it travels. Any cold noodle, roasted broccoli or cauliflower, a grain bowl, or as a dip for raw vegetables. Make double.

A Few Words from the Chef

I make this when I want something light that still eats like a proper meal, and it is the dressing that keeps me coming back to it - miso, a little peanut butter and sweet chilli, which is a shorter list than most and better than any of them. Make twice as much as you need and put the rest in a jar.