What Is Tzatziki? Yoghurt, Cucumber and Its Origins

Tzatziki is the cold, white, garlicky yoghurt-and-cucumber sauce most people meet on the side of a Greek souvlaki. It is also on our dinner menu, next to a piece of charcoal-grilled lamb, and it gets asked about more than you might expect — usually some version of “isn’t that Greek? What is it doing in a Japanese-Middle Eastern kitchen?” The honest answer is that tzatziki is only Greek in the way pizza is only from Naples: the name is Greek, the dish is much older and much wider, and the family it belongs to runs from the Balkans to Baghdad. This is the short version of that family, and what our menu does and does not tell you about our own.

What tzatziki is

Strip it back and tzatziki is salted yoghurt with cucumber in it. The yoghurt is usually strained — thick enough to hold a shape on a spoon — though some regional versions use it diluted. To that go cucumber, garlic, salt and olive oil, often a little vinegar or lemon juice, and herbs: dill, mint, parsley or thyme, depending on who is making it and where. It is served cold, and it has three jobs. It is a dip, eaten as meze with bread. It is a sauce, spooned over grilled meat and wrapped into souvlaki and gyros. And in some countries, thinned right down, it is a soup.

That last one is the clue that tzatziki is less a single recipe than a class of dish — cold, soured dairy carrying something crisp and something sharp — and the reason is chemistry as much as culture. Cold yoghurt is acidic and fatty at once, and next to anything charred and rich it does the same work a squeeze of lemon does, with a cooling edge that lemon does not have.

The name is Turkish, and older than the Greek one

The word tzatziki reached English around the middle of the twentieth century from Modern Greek, and Greek had it from Turkish: cacık, pronounced roughly “ja-JUK”. The root before that is probably West Asian. Etymologists point to Persian zhazh, a word for various cooking herbs, and to the Kurdish jaj, which means one herb in particular — caraway — with the Turkish diminutive -cık added on the end. Hold on to that caraway; it comes back below.

The paper trail is just as long. The Ottoman traveller Evliya Çelebi, writing in 1665, used cacık for a kind of herb added to food. The word appears in print in its modern sense in 1844, in the first Ottoman cookbook, the Melceü’t-Tabbahin, which describes it as simply “yoghurt with cucumber and garlic”. And the food historian Nawal Nasrallah, translating a tenth-century Baghdad cookbook by Ibn Sayyar al-Warraq, identifies its three recipes for jājaq — yoghurt salads — as an ancestor of the modern dish and the earliest known recipe for it. That is more than a thousand years of people doing essentially the same thing to yoghurt.

One sauce, a dozen passports

Because it spread with Ottoman and Turkic cooking rather than from a single kitchen, the same idea turns up under different names nearly everywhere yoghurt does:

Greece — tzatziki, typically made with strained sheep’s or goat’s milk yoghurt, cucumber, garlic, olive oil, vinegar and herbs; eaten with pita and olives, or as the sauce in gyros.
Turkey — cacık, often loosened with water, and cheerfully varied: some versions add walnuts, others swap the cucumber for chard or purslane. Our labne belongs to the same dairy family, and Turkish cooks sometimes use it in place of part of the yoghurt.
Cyprus — talattouri, with more mint and a sharper lemon edge.
Bulgaria and Albania — tarator, thinned into a cold summer soup with dill and, often, walnuts.
Iraq — jajeek, served as meze and often alongside arak, the aniseed spirit. (We do not pour arak, and we explain why in arak vs sake.)
Iran — mast-o-khiar, literally “yoghurt and cucumber”.

Further east the idea keeps going: South Asian raita is yoghurt, cucumber, salt and cumin, and it does exactly the same job next to a hot, charred plate. If you have ever had raita with tandoori chicken, you already understand tzatziki with grilled lamb.

What our menu actually says

Here is the line, from the Biggies section of the Hamilton Road dinner menu, exactly as printed:

MARGRA LAMB RUMP — méchoui spice rub, picked cucumber & ginger tzatziki, caraway

Three things are worth reading out of that, and one thing is worth not reading into it.

The spelling. “Picked cucumber” is a typo — we checked the menu’s source file rather than a photo of it, and the letter is genuinely missing. We wrote up what we found in the post on our two lamb dishes. It means pickled.

The ginger. Of the herbs and aromatics a tzatziki can carry, the one our menu names is ginger — a Japanese-leaning choice rather than a Greek one, and a clean, warm heat rather than a raw one. That is the whole of the Japanese accent in this sauce as far as the printed menu goes, and we would rather say that than dress it up.

The caraway. This is the part we enjoy. Caraway sits on the same plate as the tzatziki, and if the etymologists are right, caraway is also where the word cacık — and so tzatziki — may have started. We are not claiming the kitchen planned that; nobody has told us it did. It is just a nice accident of a plate that puts a sauce and its possible namesake side by side.

What the line does not say. It does not name the yoghurt, whether it is strained, whether there is garlic in it, or whether it is made in-house. Our labne is printed as housemade; the tzatziki is not described either way, so we will not claim it. If any of that matters to you, ask when you order.

Why it sits next to lamb

This is the oldest reason of all. Lamb fat is persistent, and a méchoui-style spice rub is warm and heavy. A cold, soured, crunchy sauce cuts across both — the acid resets your mouth, the cucumber adds water and crunch, and the temperature contrast against a plate straight off the charcoal is the point, not a side effect. It is the same logic as toum with our charcoal chicken, and the same reason almost every grilled-meat tradition from Athens to Delhi ends up with something cold and white beside it.

If you are building a table around it, our guide to ordering the mezze board covers what to start with, and we have paired the lamb twice already — once with wine and once, less expectedly, with sake. For every other word on the menu that sounds Levantine and unexplained, there is our glossary of Lebanese food.

The practical bits

It is dairy. Tzatziki is a yoghurt sauce, so it is not dairy-free or vegan. Tell us about allergies and dietary restrictions when you sit down, not when the plate arrives.
It comes with the lamb. On the current menu, tzatziki is part of the Margra lamb rump, not a separate dip — so if you want it, that is the dish to order.
Where. Habibi-san, 29 Hamilton Road, Jalan Besar. Tuesday to Sunday, 5pm to 11pm, with brunch on Saturday and Sunday from 11am to 2.30pm.

Tzatziki fits a Japanese-Middle Eastern kitchen for the same reason it fits everywhere else: it is not really a Greek sauce, it is what cooks across half a continent reach for when something comes off a fire rich and hot. For how the rest of our card fits together, start with our guide to Japanese food in Singapore — and when you want to try the lamb, book a table.