Pontefract cake

pontefract cakes, pomfret cakes, pomfrey cakes

Pontefract cakes (also known as pomfret cakes and pomfrey cakes) are a type of small, roughly circular black sweet measuring approximately .75 in (19 mm) wide and 0.16 in (4 mm) thick, made of liquorice, originally manufactured in the yorkshire town of pontefract, england.

Source: Wikipedia