Cadbury Chomp - 21g

Chomp belongs to the pocket-money end of the British sweet aisle, the little bars that lived in lunchboxes, school trip bags and the glovebox on long drives. It sits in the same family as Freddo and Curly Wurly: cheerful, unpretentious and never once trying to impress anyone.

People in Canada go looking for it because the memory is so specific. The flat shape, the purple wrapper, the chew that welds your teeth together for a moment. You can describe it to Canadian friends, but it is quicker to just hand them one and watch.

This is a single 21g bar, flat and light, which makes it handy for a coat pocket, a lunchbox or the bottom of a parcel. Keep it somewhere cool and dry, out of the sun, like any chocolate. Most people sensibly buy a handful rather than one, because one disappears before the kettle has boiled.

Cadbury makes a long list of British favourites, from Dairy Milk to Crunchie and Twirl. Chomp tends to end up in the basket next to the other small bars, the kind you split between kids or quietly keep for yourself.