Cold sauces & condiments
Chaas (Masala Chaas)
छाछ · Chaas (also called masala chaas) is the dilute, spiced yogurt drink of the Indian subcontinent, made by whisking full-fat dahi (curd) with cold water and seasoning it with roasted cumin, black salt, ginger, green chili, cilantro, and an optional curry-leaf tempering. It is thinner than Western buttermilk, tangier than lassi, and almost always savory, and it functions as both a beverage and a mealtime digestive condiment served alongside thalis, rice, and fried snacks.
The formula
1 part dahi (yogurt) : 3 parts cold water, seasoned per cup
The 1:3 ratio yields a thin, pourable North-Gujarati-style chaas; many households and South Indian recipes run thicker at 1:1.5 or 1:2, so widen or narrow the water to taste. Whisk a small amount of butterfat that rises to the surface back in or skim it, per preference.
Identity
- A dilute, savory yogurt drink — never sweet and never thick like lassi
- Always seasoned; plain whisked yogurt-water is mattha, not chaas
- Served ice-cold as a mealtime digestive and summer coolant, not a dessert
- Made in seconds by whisking; a wooden madani churner, hand whisk, blender, or immersion blender are all authentic
- It's a reusable base component: the seasoned chaas is poured/used across the meal, and the chaas masala dry blend is itself a reusable condiment
Ingredients
| Base | Dahi (full-fat Indian curd, plain yogurt) | Use slightly sour, full-fat dahi for body and tang; low-fat gives thin, watery chaas. Traditionally set the day before so it carries natural fermentation flavor. |
| Liquid | Cold water (chilled, sometimes ice-cube cold) | Ratio drives the body: 1:1.5 yields a richer Gujarati chaas, 1:3 a thin summer-drink version. Use very cold water to keep the finished drink cold without diluting flavor. |
| Seasoning | Roasted cumin powder (bhuna jeera) | The signature spice. Roast whole cumin seeds dry until fragrant, then cool and crush just before using — pre-ground cumin is weaker. |
| Seasoning | Black salt (kala namak) | Provides the sulfurous, savory tang unique to chaas masala. Tarla Dalal's masala chaas formula leans on it; plain salt alone is not authentic. |
| Aromatics | Fresh ginger, grated or crushed | Adds warmth and digestive bite. Used in most North Indian and Gujarati versions; optional in South Indian recipes. |
| Aromatics | Green chili, minced or slit | Slit chilies give a mild aroma; minced chilies give heat. Used across regions, often replaced by chili powder in restaurant versions. |
| Garnish | Fresh cilantro (coriander leaves), chopped | Standard across North/West Indian versions; provides the green flecks and a fresh top note. Sometimes swapped for mint in summer (pudina chaas). |
| Aromatics | Curry leaves, tempered in ghee or oil | South Indian fingerprint: 8–10 leaves sizzled in 1 tsp ghee with optional mustard seeds and a dry red chili, then poured over the finished chaas. |
Method
- 1Roast 1–2 tsp whole cumin seeds dry in a small pan over medium heat until dark and fragrant, then cool and crush to a coarse powder.Dry-roasting volatilizes cumin's bitter notes and replaces them with the warm, nutty aroma that defines chaas. Crushing fresh, per batch, keeps the flavor brighter than pre-ground powder.
- 2Whisk the dahi and chilled water together until completely smooth and slightly frothy, traditionally with a madani (wooden churner) or in a blender for 20–30 seconds.Breaking all the curd lumps is non-negotiable — any unwhisked curd clump ruins the drink's texture and pulls butterfat where you don't want it. The slight aeration gives the characteristic light froth on top.
- 3Stir in the roasted cumin powder, black salt (and regular salt to taste), grated ginger, minced green chili, and chopped cilantro.Adding seasonings to the diluted liquid, not to the curd, ensures even distribution; chaas masala clumps instantly in thick dahi.
- 4(Optional South Indian tempering) Heat 1 tsp ghee or oil, pop ¼ tsp mustard seeds, add 8–10 curry leaves and 1 broken dry red chili; let them splutter for 5–6 seconds only, then tip the hot tarka over the finished chaas and cover for 30 seconds.The hot tempering briefly infuses the curry leaves' volatile oils through the cold liquid while the lid traps the aroma — the same logic as a phoron in dal or raita.
- 5Taste and adjust with more salt, chili or a small squeeze of lime if the dahi was too mild; chill until needed.Tang and salt vary day to day with the dahi, so final seasoning must be tasted. Acid (lime) is only added when the yogurt base is flat, not by default.
- 6Pour into chilled steel tumblers or small glasses and serve immediately, ideally with a small bit of butterfat floating on top.Chaas separates quickly; the butterfat raft is prized by some cooks and skimmed by others. It is served at table temperature-of-cold, never warm, otherwise the cumin and curry-leaf aromatics dull.
Techniques that matter
Madani churning
The wooden hand churner (rabdi/madani) is the traditional tool — it agitates the curd just enough to incorporate air and break clumps without whipping in too much foam, and it leaves a thin layer of separated butter on top that purists keep.
Dry-roasting whole cumin
Pre-roasted and pre-ground cumin loses its top notes within weeks; roasting whole seed per batch is the difference between aromatic and dusty chaas.
Phutana / tarka of curry leaves
Curry leaves' flavor molecules are fat-soluble and heat-activated; a brief ghee tempering unlocks the South Indian profile that cold-steeping the leaves alone cannot deliver.
Variations & derivatives
Masala ChaasGujarat, North India (pan-Indian)
The canonical restaurant/home version: 1:2 to 1:3 dahi:water, cumin, black salt, ginger, chili, cilantro. The default masala profile.
Pudina ChaasGujarat, Maharashtra
Cilantro swapped for a small handful of fresh mint leaves; particularly common in summer for added cooling.
South Indian Moru / MajjigaTamil Nadu, Kerala, Andhra, Karnataka
Thinner (often 1:3 or 1:4) and built around a curry-leaf/mustard-seed ghee tempering; ginger often omitted, green chili always present. Kerala versions sometimes add a pinch of asafoetida.
MatthaNorth India (UP, Rajasthan, Bihar)
The minimal version — just churned dahi and water with a pinch of salt and roasted cumin; no ginger, chili, or herbs. Less frothy, more about the yogurt itself.
BorhaniBangladesh (and Bengal-influenced diaspora)
Often uses the gondhoraj lebu (Bengal lemon) for citrus aroma, plus mint and a touch of green chili; sometimes finished with crushed toasted cumin. Served at the end of heavy meals like biryani.
Bhang ChaasNorth India (Holi, Varanasi, Vrindavan)
A festive version where the water is replaced by a thinned paste of bhang (cannabis leaves) for the Holi ritual; the same spice profile of cumin, black salt, chili and mint applies.
Used in these dishes
Substitutions
- Whole-milk dahi → Cultured Western buttermilk (kefir or live-culture buttermilk) — Western buttermilk is already thinned and tangy; use it straight, skip the extra water, and salt more cautiously as it lacks dahi's body.
- Black salt (kala namak) → Equal regular salt + a tiny pinch of asafoetida or a few drops of chaas masala concentrate — Black salt carries the signature sulfurous tang; plain salt alone makes chaas taste flat and Western.changes result
- Fresh curry leaves → Dried curry leaves (3–4 crumbled) or ¼ tsp curry leaf powder — Dried leaves give a muted, hay-like note; only acceptable if fresh are unobtainable.changes result
- Cilantro → Fresh mint (pudina), or a 50/50 mix — Mint is the standard summer swap; do not use dried herbs — they turn the drink brown and dusty.
- Roasted cumin powder → Toasted and freshly ground coriander seed (dhania) powder — Changes the profile toward dhania-chaas (popular in Punjab). Use 1:1 by volume; the drink becomes more citrusy, less earthy.
Troubleshooting
Chaas is too thick and yogurt-heavy
Too little water, or dahi that is very fresh (low whey separation) → Whisk in more cold water 2 tbsp at a time until it pours in a thin stream; older, slightly soured dahi thins more readily than day-of-set curd.
Muddy, dusty, low-aroma flavor
Pre-ground commercial cumin powder that has been sitting open, or cumin roasted at too low a heat → Discard old stock; roast whole seeds on medium until they darken and smell nutty within 60–90 seconds, then crush just before whisking.
No froth / no body, tastes watery
Skim/non-fat dahi, or over-dilution → Switch to full-fat dahi; next time cut water to 1:2 or 1:1.5; if it's already diluted, whisk a fresh 2 tbsp dahi into the same batch.
Curry-leaf tempering turns the drink bitter or oily
Leaves burned in the ghee, or fat pooled on top instead of infusing → Pull the pan off heat the instant leaves stop sizzling; if pooled oil forms, skim with a spoon — chaas should taste of curry leaves, not of ghee.