Hey,
I dont know if I am going mad or not, but there used to be this chocolate bar available when I was about 9 (about 20 years ago - omfg) that Im sure was pretty well known, because you could even get it in an easter egg. Anyhoo from what I can remember, it might have come in a pink wrapper, but it was pink marshmallow covered in chocolate and it was in a cylinder shape about the same length as a twix finger. You may or may not have got two in a pack, but I remember them being brilliant.
Does this ring any bells with anyone? I dont know if its relevant, but I stay in Scotland, so it may only have been a scottish thing.......Any ideas?