Galaxy Minstrels,  previously known simply as Minstrels are milk chocolate buttons with a hard glazed shell sold in several countries including the UK,Ireland, South Africa, Kenya, Cyprus, France, Malta, and Spain.

They originally had the slogan “They melt in your mouth, not in your hands”, the same one used by M&M’s in the United States (also used to market M&M’s in the UK in the 1980s and 1990s).

In line with Mars’ re-branding, Minstrels were brought under the Galaxy brand and are now sold as “Galaxy Minstrels”, referring to the use of Galaxy chocolate in them.

Info gleaned from Wikipedia