Also a (rather tasty) chocolate confectionary available in the United Kingdom introduced the early 1980's and still available today.
Advertising strapline: The chocolate that melts in your mouth, not in your hand.
This is true since the chocolate center is encased in a hard shell (although I'm sure that if you held one in your hand for long enough, you could get one to melt)!
A minstrel is slightle larger than a British pound coin, and shaped like a flattened sphere.
Minstrels also make an appearance as part of the variety pack of chocalate confectionary known as Revels.