Wellness Origin HubSalted lime soda, the fizzy street drink of India and Vietnam
A salted lime soda made the way it is sold in India as nimbu soda and in Vietnam as soda chanh muoi: fresh lime, a pinch of salt, a little sugar and plenty of fizz.
Salted lime soda is fresh lime juice, a pinch of salt and a little sugar, topped with cold soda water and stirred over ice. It is sour, faintly salty and very fizzy, and on a hot afternoon it is more refreshing than anything sweet. It takes three minutes.
Two of the hottest places in the world drink a version of it. In India it is nimbu soda (or fresh lime soda), made to order at juice stalls, cafes and roadside stands. In Vietnam it is soda chanh muối, made with limes that have been preserved in salt for weeks. The recipe below is the quick Indian-style version, with a note on the Vietnamese one further down.
How to make it
- Squeeze the limes into a tall glass.
- Add the salt and sugar and stir until they dissolve completely. This matters: salt and sugar dissolve slowly in cold soda water.
- Fill the glass with ice.
- Pour in the soda water slowly, down the side of the glass, so it keeps its fizz.
- Stir once from the bottom, taste, and add a little more salt or sugar if you want.
Sweet, salted or mixed
Order a fresh lime soda in India and you will often be asked how you want it. The three standard choices are worth knowing, because they change the drink a lot.
| Style | What goes in | How it tastes |
|---|---|---|
| Salted | Lime, salt, sometimes black salt and roasted cumin | Sharp, savoury, very thirst-quenching |
| Sweet | Lime and sugar syrup | Like a fresh, tart lemonade |
| Mixed | Lime, a little salt and a little sugar | Balanced; the version in this recipe |
The salt does more than make it salty. A small amount takes the edge off the sourness and makes the lime taste brighter, the same trick that makes a pinch of salt work in caramel.
The Vietnamese version
Chanh muối are small limes packed in salt and left in a jar in the sun for weeks, until they turn soft, brownish and deeply tangy. To make soda chanh muối, a piece of salted lime is mashed in a glass with sugar, then topped with ice and soda water. The flavour is rounder and more fermented than fresh lime, closer to a preserved lemon.
Jars of salted limes are sold in some Vietnamese grocers. If you find them, use one small lime (or half of a larger one) with a teaspoon of its brine and two teaspoons of sugar in place of the fresh juice and salt above. Taste before adding more salt; the brine is strong.
Tips for the best flavour
- Use fresh limes. Bottled lime juice tastes flat and slightly bitter in a drink this simple.
- Roll the limes first. Press and roll them on the counter before cutting; they give more juice.
- Chill everything. Cold soda water holds its bubbles much longer than warm.
- Start with less salt. You can always add more. A drink that tastes like seawater cannot be rescued.
Variations
- Masala soda: add a pinch of kala namak (Indian black salt) and a pinch of roasted ground cumin. It smells eggy in the jar but tastes savoury and deep in the glass.
- Mint: bruise a few mint leaves in the glass before the ice.
- Ginger: add half a teaspoon of fresh ginger juice, as in our ginger lemon tonic.
- Pitcher for a crowd: use the serving buttons beside the ingredients, mix the lime, salt and sugar in a jug, and top each glass with soda water as you pour.
- Still version: use cold still water instead of soda for an Indian nimbu pani. For another long, cooling glass, try our cucumber mint agua fresca.
Make ahead and storage
The lime, salt and sugar base keeps in a closed jar in the fridge for a day. Add the soda water only when you serve. Once mixed, the drink goes flat within the hour.
Questions people ask
Is salted lime soda good after sweating?
On a very hot day, a lightly salted drink can be pleasant after you have sweated a lot, and that is one reason it is popular in hot climates. For most everyday activity, plain water is enough. Our guide to electrolytes explains when salt in a drink actually matters.
How much salt is in a glass?
A quarter of a teaspoon of fine salt is roughly 1.5 g of salt. The NHS recommends adults eat no more than 6 g of salt a day in total, so one glass is about a quarter of that.
Can I make it without sugar?
Yes. The salted version is traditionally made without any sugar. It is sharper, and some people find it more refreshing. Compared with a can of fizzy drink, either version is a very easy way to cut down on sugar in drinks.
Photograph: AI-generated image
