Crunchie was originally launched in the UK by JS Fry & Sons in 1929. It was an instant success.
The method of making the crunchy, sugary honeycomb centre was a complicated secret, but in 1935 the management of Rowntree’s received a package promising to reveal the secret in return for £5,000.
Shocked by this treachery, Rowntree’s immediately ratted out the sender to Fry’s back in Bristol.
Cadbury’s took over the production of the bars in the early 1970s.