Bonfire toffee

Bonfire toffee is a hard, brittle toffee associated with Halloween and Guy Fawkes night in the United Kingdom. The toffee tastes very strongly of black treacle, and cheap versions can be quite bitter. In Scotland, the treat is known as claggum, with less sweet versions known as clack. In Wales, it is known as loshin du . The flavour is similar to that of butterscotch, although it is a toffee and never a viscous liquid.