Black Jacks are the king of retro sweets. Their aniseed flavour combined with your now black tongue make these sweets what they are today.
Black Jack is a type of "aniseed flavour chew" according to its packaging. This means that it is a chewy (gelatin-based) confectionery. Black Jack is manufactured under the Barratt brand in Spain. In the 1920s Trebor Bassett manufactured them, and the wrapper showed gollywogs on it. An example of it can be seen at the V&A Museum of Childhood.
While still manufactured under Tangerine Confectionery, Black Jacks have been rebranded from Barratt to 'Candy Land' and the packaging, most notably the outer box, has been redesigned. (2013)
Soya Lecithin :
May Contain Traces Of Milk