Masala Chaas (Spiced Buttermilk)

About this recipe

Chaas is what we reach for when the meal has been rich and the day is hot—thinner than lassi, savoury not sweet, and gone in three gulps if you're thirsty. It's been made in Gujarati kitchens for generations, and the technique matters more than the ingredients. The trick is whisking the yoghurt until it's completely smooth and lump-free before any water goes in; that single step is what separates a silken chaas from one that splits and curdles. Roasted cumin rather than raw brings a toasty depth that makes this taste like a Gujarati kitchen, and black salt is absolutely non-negotiable—it's what creates the savoury profile. Yoghurt mixed with cold water should taste refreshing without being thin or watery. The proportion leans towards more yoghurt than most Western buttermilk versions; you want something that tastes like curd has met water, not the reverse. Roasted cumin, black salt, and fresh mint create the entire flavour profile—there's nothing else competing for attention. Some families add a touch of ginger for warmth, but the real flavour comes from technique and patience with whisking. Whisk the yoghurt in a clean bowl until it's completely silky, then add cold water gradually while whisking, so it incorporates evenly rather than curdling. If you add water all at once to thick yoghurt, the drink breaks. The whisking also aerates the chaas, making it feel lighter and more refreshing. Some families use a hand churn (a jhara) for this step, which adds tradition and takes longer but creates the finest, most delicate texture. Serve in tall glasses over ice, with a fresh coriander leaf and a pinch of roasted cumin floating on top. A single mint leaf crushed into the glass releases its aroma right as you drink. Authentic chaas tastes savoury enough to serve alongside a heavy curry, but light enough to drink on its own. It's best consumed immediately after whisking, when the foam is fresh; it keeps in the fridge for a day but the texture coarsens slightly.