Charcoal biscuit

[2] Charcoal biscuits were first made in England in the early 19th century as an antidote to flatulence and stomach trouble.

[5] In modern times charcoal biscuits are made in the form of crackers to accompany cheeses.

[1] In Brideshead Revisited, Evelyn Waugh writes of Charles Ryder consuming charcoal biscuits and iced coffee while cramming for exams at Oxford.

In Reaper Man, they are implicated in the explosive death of Mustrum Ridcully's uncle.

In August 2012, charcoal biscuits were featured in the dessert round of an episode of the Chopped: Grillmasters tournament on Food Network.