There is a particular sound that starts a Bengali evening. Not a doorbell, not a kettle. It is the sound of a packet being torn open and tipped into a bowl.

Adda is hard to translate. People reach for “chat” or “hangout”, and neither is right. An adda has no agenda and no end time. It is conversation for its own sake — politics, football, a cousin’s wedding, the price of hilsa, all of it circling for hours without arriving anywhere. That is the pleasure of it.

The unwritten rules

Somebody makes the cha. This is usually the host, and it is usually a small performance — the pouring from height, the insistence that this batch is better than last week’s.

Somebody else opens the packet. This is never negotiated but it is never random either. It falls to whoever arrived last, or whoever is closest to the shelf, and once you have done it twice it becomes your job permanently.

The bowl goes in the middle. Not in front of anyone. An adda has no host at the table, only a centre.

Why the snack matters more than it should

Something has to occupy the hands while the mouth is busy. That is the practical answer. But there is more to it.

A shared bowl sets a rhythm. You reach, you talk, you reach again. The pauses in a conversation stop being awkward because there is always something to do with them. Anyone who has sat through a meeting with nothing on the table knows the difference.

And it sets a clock, loosely. Nobody says the evening is over. The bowl empties, somebody scrapes the last of the chanachur into their palm, and within twenty minutes people are looking for their shoes. The packet ran out, so the adda ran out.

What we learned making one

When we started Bong Crunch, we thought we were making a snack. We were really making a prop for other people’s evenings — and that changed a few decisions.

It changed the pack size, for one. A packet has to be big enough to pass round four people twice, and small enough that it does not go stale on the second night.

It changed how we think about heat, too. A very hot mix is a solo pleasure. Something in the middle keeps everyone reaching, including the aunt who says she cannot manage spice and then finishes half the bowl.

The best compliment we get is not about flavour. It is when somebody says the packet did not last the evening.