What Is Ash Reshteh? Iran’s Herb-and-Noodle Soup

Ash reshteh (آش رشته) is a thick Iranian soup built from fresh herbs, legumes, noodles, and deeply browned onions. It is filling enough to be a meal, but its importance goes beyond comfort food: Iranian families often make a large pot for gatherings, cold days, and celebrations connected with the end of the old year and the arrival of Nowruz.

Its defining contrast is easy to recognize. Beans and lentils make the soup earthy and substantial; chopped herbs turn it green; reshteh noodles soften into the broth; and tangy kashk, fried mint, garlic, and onions create the dramatic garnish on top.

What does “ash reshteh” mean?

Ash is the name for a family of thick soups or pottages in Iranian cooking. It is not the English word “ash.” Reshteh means strands or threads and, in this dish, refers to the flat wheat noodles running through the soup. That is why the name is commonly translated as “Persian noodle soup,” although the English phrase does not fully convey how thick, herb-heavy, and bean-rich the dish is.

You may see the name written as ash-e reshteh, aash reshteh, ashe reshteh, or aush reshteh. The small -e represents the Persian ezafe sound linking the two words: literally, “ash of noodles.”

What is in ash reshteh?

Recipes vary by household, season, and what is available, but a recognizable bowl normally brings together five groups of ingredients:

• Fresh herbs and greens: commonly parsley, cilantro, spinach, and chives or green onion.
• Legumes: lentils plus beans and chickpeas create body and make the soup satisfying.
• Reshteh: flat Persian soup noodles, usually added near the end so they remain distinct.
• Aromatic base: onions, garlic, turmeric, and dried mint build layers of savory flavor.
• Kashk: a salty, tangy fermented dairy product, spooned into the soup or swirled over the surface.

A recipe collected from an Iranian American cook by Ajam Media Collective uses spinach, parsley, cilantro, garlic chives, lentils, chickpeas, red beans, noodles, turmeric, onions, garlic, mint, and kashk. The exact proportions are flexible; the balance matters more than a single rigid formula.

Is ash reshteh a soup or a stew?

It is usually called a soup in English, but it is much thicker than many broth-based soups. The legumes, chopped greens, and noodles absorb liquid as they cook, producing a spoonable pottage that can stand as the main dish.

A well-made pot should not be dry, yet it should have enough body to hold the decorative streaks of kashk, mint oil, and fried onions placed on top. If it becomes too thick, cooks loosen it with hot water or broth; if it is too thin, gentle uncovered simmering helps it concentrate.

Why is ash reshteh associated with Nowruz?

Ash reshteh is eaten throughout the colder months, not only at New Year. Still, it has a special place around the final days before Nowruz. The Smithsonian’s National Museum of Asian Art identifies it as a Nowruz delicacy and describes it simply as a noodle-and-bean soup.

Iranian families also serve it around Chaharshanbe Suri, the fire-jumping celebration held before Nowruz. Ajam’s account notes that people commonly prepare the dish in large quantities and share it with relatives, neighbors, and passersby. That communal scale is part of its character: ash reshteh is a dish that rewards a large pot and many bowls.

Noodles are sometimes explained as symbols of the paths or threads of life and of taking hold of good fortune in the year ahead. Symbolic explanations can vary from family to family, so it is better to understand this as a living interpretation rather than one compulsory rule.

For a broader view of the season, read our guide to Nowruz in the United States and Canada.

What is kashk, and can you leave it out?

Kashk gives ash reshteh its most distinctive finishing flavor: concentrated, salty, and sour. It is a fermented dairy product sold in liquid or dried form in Iranian and Middle Eastern grocery stores. Liquid kashk is usually warmed or diluted before serving, depending on the product.

You can omit it for a vegan bowl. The soup itself can be made entirely from herbs, legumes, noodles, water, and plant-based oil. A squeeze of lemon will add acidity, but it will not reproduce kashk’s fermented dairy flavor. If dietary needs permit, plain yogurt is a convenient garnish, though it is a substitute rather than the same ingredient.

How is ash reshteh garnished?

The surface is part of the pleasure. Instead of treating garnish as an afterthought, Iranian cooks often turn the bowl into a design using:

• Piaz dagh: thinly sliced onions fried until deeply golden.
• Sir dagh: fried garlic.
• Na’na dagh: dried mint briefly bloomed in hot oil.
• Kashk: pale swirls or lines that contrast with the green soup.

The mint should be heated briefly; dried mint can turn bitter if fried too long. The onions need more patience. Their sweetness and crisp edges balance the sour kashk and earthy legumes.

A practical way to make ash reshteh

1. Prepare the legumes. Soak dried beans and chickpeas as needed, then cook until nearly tender. Lentils cook faster and can be added later.
2. Brown the aromatics. Fry sliced onions slowly, reserving some for garnish. Add garlic and turmeric to the pot.
3. Add herbs and liquid. Stir in the chopped greens, then enough water or broth to let them simmer without scorching.
4. Build the body. Add the cooked beans, chickpeas, and lentils. Simmer until the flavors come together.
5. Add noodles near the end. Reshteh thickens the soup as it cooks, so stir gently and add more hot liquid if necessary.
6. Finish and decorate. Adjust salt carefully—kashk can be salty—then top each bowl with fried onion, garlic, mint, and kashk.

For diaspora cooks who cannot find reshteh, a flat wheat noodle such as linguine can work in texture, as Ajam’s recipe suggests. Break long pasta into shorter lengths before adding it. The result will not be identical, but the herb-legume structure of the dish remains intact.

How ash reshteh fits the Persian table

Ash reshteh is usually served from a communal pot into individual bowls, often with bread and extra garnish nearby. It belongs comfortably on a sofreh, the cloth or surface around which a Persian meal is arranged. Because it contains several legumes, noodles, and generous herbs, it needs little accompaniment.

The dish also demonstrates a recurring strength of Iranian cooking: inexpensive pantry ingredients become celebratory through time, layering, and presentation. A pot can be practical weekday food, a warming autumn meal, or something prepared in quantity for guests.

Bring Persian food traditions into the year

For a month-by-month celebration of Iranian dishes, see the Persian Food Desk Calendar 1405. Home cooks may also enjoy the Persian Garden Chef Apron, whose herb, saffron, and pomegranate pattern fits naturally into a kitchen shaped by Persian flavors.

Sources and image credit

• Smithsonian National Museum of Asian Art: Persian New Year celebration and ash-e reshteh.
• Ajam Media Collective: Ash-e Reshteh recipe and Iranian diaspora context.
• Wikimedia Commons: “Ash e reshte” photograph and license record.

Featured image: Traditional Iranian ash reshteh photographed in Tehran, Iran, by Rye-96 on November 24, 2016. Reused without alteration under the Creative Commons Attribution-ShareAlike 4.0 International license, via Wikimedia Commons.