Why this mango lassi earns its place on a British summer table

Come July, most of us are somewhere between a heatwave and a rain shower, and the last thing anyone wants is a heavy pudding. A mango lassi sits in that lovely middle ground: cold, thick enough to feel like a treat, but light enough to drink alongside a plate of hot food. If you have ever eaten in a Bangladeshi or Sylheti restaurant, you will have seen them arrive at the table in tall frosted glasses — the quiet hero that rescues your palate after a spoonful of fiery shatkora beef or a mouthful of lamb biryani.

Lassi itself is a North Indian classic, but it has been thoroughly adopted by Bangladeshi families and the Sylheti restaurant kitchens of Brick Lane, Rusholme and the Midlands. Alongside borhani — that sharp, savoury yoghurt drink flecked with mint and mustard — the sweet mango version has become a fixture of family celebrations, iftar tables and long Sunday lunches. This recipe is the one I make at home: three minutes in a blender, no cooking, no fuss.

Choosing your mangoes (and what to do out of season)

The single biggest factor in how good your lassi tastes is the fruit. You want mangoes that smell sweet at the stem end and give slightly when pressed, like a ripe avocado. Avoid anything hard and green — it will taste of nothing.

• Alphonso gives a deep, honeyed flavour and a gorgeous saffron-orange colour. Worth the money when you can find them.
• Kesar is nearly as fragrant and often better value, with a slightly firmer flesh that blends beautifully.
• Ataulfo (sometimes sold as honey mango) is small, almost fibre-free and reliably sweet — excellent for lassi.
• Pakistani or Bangladeshi varieties such as Sindhri or Fazli, sold in South Asian grocers, are ideal: generous, juicy and intensely aromatic.

Out of season, tinned Alphonso pulp is a perfectly respectable substitute. Use about 400g and check the label for added sugar, adjusting the honey downwards if it is sweetened. Frozen mango chunks work too, and they have the bonus of chilling the drink without diluting it.

What you will need

• 2 large ripe mangoes, peeled and cubed (roughly 500g of flesh), or 400g tinned pulp
• 300g full-fat natural yoghurt — Greek-style or a thick set yoghurt from an Asian grocer
• 150ml cold whole milk, or water if you prefer a lighter drink
• 1 to 2 tablespoons honey, to taste
• 3 to 4 green cardamom pods, seeds crushed finely
• A small pinch of fine salt
• A squeeze of lime juice
• A handful of ice cubes

Optional extras: a few strands of saffron soaked in a tablespoon of warm milk, a tablespoon of double cream for a restaurant-style richness, or two mint leaves for a fresher finish.

How to make it, step by step

Chill everything first. Cold ingredients make a cold lassi. If your yoghurt and milk come straight from the cupboard, you will end up adding so much ice that the drink turns watery.

Blend the base. Tip the mango, yoghurt, milk, honey, crushed cardamom, salt and lime into a blender. Blitz on high for a full 45 to 60 seconds. This is longer than you think you need, but it is what gives you that silky, almost mousse-like texture rather than a grainy purée.

Taste and adjust. Every mango is different, so taste before you commit. Too tart? Add another half tablespoon of honey. Too sweet? A little more lime. Missing something? That pinch of salt is doing quiet, important work — it sharpens the fruit.

Add the ice last. Drop in the ice cubes and pulse briefly, just until crushed. Blending ice for a full minute aerates the drink and thins it out.

Serve immediately. Pour into chilled glasses, dust with a little extra crushed cardamom, and if you are feeling generous, swirl a thread of saffron milk across the top. It will hold in the fridge for a few hours, but give it a good stir before serving as it will separate.

Fine-tuning: common problems and how to fix them

• Too thin: strain the yoghurt through muslin for an hour before you start, or add a tablespoon of Greek yoghurt at the end.
• Too thick to pour: loosen with a splash more milk, a tablespoon at a time.
• Grainy texture: your mango was fibrous. Push the finished lassi through a fine sieve, or use a smoother variety next time.
• Separated or split: usually a sign of low-fat yoghurt or a blender run too long. Full-fat yoghurt is not negotiable here.
• Flat flavour: more cardamom, more lime, and never skip the salt.

Serving it with Bangladeshi and Sylheti food

This is where the mango lassi truly shines. Serve it ice-cold beside a chicken or lamb biryani, a Sylheti-style beef curry heavy with dark roasted spices, or a plate of grilled kebabs and lamb chops straight off the barbecue. The yoghurt coats the tongue, the sweetness takes the edge off the chilli, and the cardamom lifts everything. It is also a wonderfully easy drink to put out at iftar, alongside dates and borhani, and it keeps children happy at a family gathering where the adults are working through the hot stuff.

For a sit-down meal, pour it into small tumblers rather than pint glasses — it is rich, and a little goes a long way. And do try it with a piece of mishti or a slice of mango between sips; the contrast of cold, tart lassi and warm, sweet dessert is one of the small pleasures of the season.