Finally, a soft-shell crab roll gave up its secret ingredient.

The family joke was that her secret ingredient was cigarette ash.

His secret ingredient is a large dollop of tomato ketchup added to the mince to give sweetness and flavour.

Locals claim the secret ingredient is the crushed eggshells, added to the brew before it is filtered through what looks like an old pair of tights.

Meanwhile every inmate in the joint came up with some family recipe or secret ingredient that could be the next big thing.