Tamarind, the Sour Heart of Southern Iranian Cooking

Ask someone to name the taste of Persian food and they will usually reach for saffron. Fair enough. But spend time in a kitchen in Abadan or Bushehr and you notice something else doing the quiet work underneath, a dark, fruity sourness that pulls everything into focus. That is tamarind.

Iranians call it tamr-e hendi, which translates literally as Indian date. The name is a small piece of history in itself, and it explains a lot about why the pods turn up constantly in the south and hardly at all in Tehran.

What tamarind actually tastes like

Tamarind grows in long brown pods. Crack one open and the pulp inside is sticky, seedy, and the colour of dark treacle. On its own it is bracingly sour, but it is a rounded sourness rather than a sharp one, closer to a very tart prune or an underripe date than to lemon.

That roundness is the point. Lemon juice cuts through a dish and then disappears. Tamarind sits in the base of a stew and stays there, giving it depth and a faint sweetness that keeps the sour from turning thin or metallic. It also darkens whatever it touches, which is why southern stews look nothing like the bright green herb stews of the north.

Why the south, and not the rest of Iran

Iran's southern coast has spent centuries trading across the Persian Gulf. Ships moved between the Iranian ports and India, Oman, Zanzibar, and the wider Indian Ocean, and they carried cooking with them in both directions. Tamarind, along with a heavier hand with chilli and turmeric, came north into Khuzestan and Hormozgan and simply stayed.

The climate helped. The Gulf coast is hot and humid, and the food that developed there is built around fish and shellfish rather than lamb. Tamarind happens to be exactly what oily fish wants. It cuts richness without bleaching out flavour the way a squeeze of citrus does.

In the south, sourness is not a finishing touch. It is the foundation you build the pot on.

Our family is from Abadan, which sits at the top of that coastline where the Arvand river meets the Gulf. We wrote more about that in The Flavors of Abadan.

How we use it at Vatan

Two dishes on our menu lean on tamarind directly, and they use it in different ways.

• Ghalie Meygoo, our shrimp stew, is the classic southern preparation. Herbs, garlic, and tamarind cooked down until the sourness and the greens stop being separate things. It arrives with house bread, which is the correct way to eat it.
• Grilled Branzino is stuffed with hashbureh, a mix of fresh herbs, tamarind, and garlic. Here the tamarind works from the inside out, seasoning the fish as it roasts rather than surrounding it.

If you want to taste the difference between the two approaches side by side, both are on the dinner menu.

Tamarind and the other Persian sours

Persian cooking has an unusually large vocabulary for sourness, and the choices are not interchangeable. A cook picks one the way a painter picks a colour.

• Tamarind, tamr-e hendi. Dark, fruity, slightly sweet. Southern stews, fish, shellfish.
• Dried lime, limoo amani. Musty, almost fermented, faintly bitter. Ghormeh sabzi and northern lamb stews.
• Verjuice, ab ghooreh. Pressed unripe grapes. Clean and green, the lightest of the four.
• Pomegranate molasses, rob-e anar. Thick, sweet and sour, tannic. Walnut sauces and marinades. It turns up in our Kal Kabab and our Parvardeh Toastini.
• Sumac, somagh. Dry and astringent, dusted over grilled meat at the table rather than cooked into anything.

Swap one for another and you have not made the dish slightly differently, you have made a different dish. Tamarind in a ghormeh sabzi tastes wrong for reasons most people cannot name but immediately notice.

Buying and using tamarind at home

Tamarind is sold in three forms, and the difference between them causes more failed recipes than anything else.

Compressed block

A dense brick of pulp with the seeds and fibre still in it. This is what most southern Iranian cooks use. Break off a piece, cover it with hot water for fifteen minutes or so, then work it with your fingers and push it through a sieve. You get a thick, live-tasting purée. It takes effort and it is worth it.

Wet paste in a jar

Already strained, and the most convenient option. Strength varies enormously between brands, so taste before you commit. Start with less than the recipe asks for and adjust upward.

Concentrate

Very dark, very strong, often close to black. Useful, but easy to overdo. Treat a spoonful of concentrate as roughly equivalent to several spoonfuls of paste, and add it at the end rather than the beginning.

Whichever you use, add tamarind late and taste as you go. Sourness concentrates as a stew reduces, and there is no way to take it back out once it is in.

Come and taste it properly

Reading about a souring agent only gets you so far. The south's cooking makes sense the moment it is in front of you, warm, sour, and a little smoky, with bread to push it around the plate. Save a seat and we will show you what we mean.