Why Onion Bhajis Belong to the Weekend

There is something deeply satisfying about a plate of onion bhajis on a Saturday afternoon. They sit somewhere between a snack and a meal, they cost very little to make, and they fill the kitchen with a smell that pulls everyone in from the other rooms. For British-Bangladeshi families, especially those with Sylheti roots, the bhaji is not a novelty. It is everyday food that happens to taste like a treat.

In Sylhet and across Bangladesh, a close cousin of the bhaji is the piyaju — a fritter built around sliced onion, sometimes with soaked lentils, chilli and coriander, fried until deep golden and eaten with tea, or at iftar alongside chickpeas and puffed rice. Restaurant versions in the UK tend to be bouncy and dense, often because the batter is overmixed or the oil is too cool. Made at home, with a loose batter and a hot pan, they come out light, lacy and properly crisp. That is the version worth mastering.

Start With the Onions

The onion is the whole point, so treat it with a bit of care. You want two large brown onions, roughly 350–400g once peeled. Red onions work too and give a slightly sweeter结果, but brown onions hold their shape better in hot oil.

• Slice them thinly, about 3mm, ideally with a mandoline or a sharp knife. Thick slices stay raw in the middle; paper-thin slices dissolve into the batter.
• Tip the slices into a bowl, sprinkle over 1 teaspoon of fine salt and toss well.
• Leave for 15 minutes. The salt draws out water, which softens the onions and gives you a natural liquid for the batter.
• Squeeze the onions gently over the bowl. Keep that onion water — you will use it instead of plain water.

This one step is the difference between a bhaji that tastes seasoned throughout and one that tastes flat.

The Batter: Gram Flour, Cumin and Fresh Herbs

Gram flour, or besan, is the backbone. It crisps beautifully and has a nutty, faintly sweet flavour that plain flour cannot match. For two large onions you will need:

• 150g gram flour, sifted
• 1 tablespoon rice flour (optional, but it makes the crust noticeably crisper)
• 1 teaspoon cumin seeds and 1 teaspoon ground cumin
• Half a teaspoon turmeric and half a teaspoon ajwain, if you have it — ajwain has a thyme-like, slightly medicinal note that is very Sylheti
• A pinch of asafoetida and half a teaspoon garam masala
• Two finely chopped green chillies and a generous handful of chopped coriander
• Half a teaspoon of ginger paste, if you like a warmer finish

Combine the dry ingredients, then add the drained onions, chilli, coriander and ginger. Mix with your hands, then add the reserved onion water a spoonful at a time. Stop when the batter just coats everything — it should be thick and clingy, not pourable. A loose, watery batter slides off the onions and leaves you with pale, oily fritters. Let the mixture rest for 15 minutes before frying; the flour hydrates and the whole thing binds better.

Frying for a Proper Crisp Shell

Heat 4–5cm of neutral oil in a deep, heavy pan to 170–180°C. If you have no thermometer, drop in a little batter: it should sink, then rise and sizzle steadily within a few seconds. If it browns immediately, the oil is too hot.

• Take a heaped tablespoon of mixture and lower it in gently, flattening it slightly with the back of the spoon. Loose, ragged edges give you the crunchy bits everyone fights over.
• Fry in batches of four or five. Crowding drops the oil temperature and makes the bhajis greasy.
• Cook for 3–4 minutes, turning once, until deep golden and firm.
• Drain on a wire rack rather than kitchen paper. Paper traps steam and softens the crust.

Keep finished bhajis warm in a low oven at about 100°C while you fry the rest. They will hold for 20 minutes without losing their crunch.

Sylheti Twists and Variations

Once you are confident with the basic mix, the variations come easily. Piyaju often includes a handful of soaked chana dal or red lentils, roughly crushed, which gives a denser, more savoury bite — good with a cup of strong tea. Some cooks add a beaten egg for a softer, richer fritter, and plenty of Sylheti households go heavy on the coriander and green chilli and light on the spices, letting the onion lead.

You can also fold in grated carrot, finely sliced spring onion or a spoonful of chopped curry leaf. Keep the total added volume small, though, or the batter will not hold together.

Serving, Dipping and Making Ahead

Bhajis are best eaten hot, within minutes of leaving the oil. Serve them with a cooling mint raita, tamarind chutney, or simply a squeeze of lime and a dusting of chaat masala. They work as a starter, as a side with dal and rice, or tucked into a wrap with shredded salad and yoghurt.

To make ahead, fry them completely, cool on a rack, then chill for up to two days. Reheat on a baking tray in a hot oven at 200°C for 6–8 minutes — never in a microwave, which turns them limp. The batter itself can be mixed and kept covered in the fridge for a few hours before frying, which makes them genuinely easy to pull together when friends turn up. That, more than anything, is what makes them a weekend food worth keeping in rotation.