I thought some of you would be interested in this "trick".
I found the thread on reddit yesterday.
In the comments there are a few descriptions of how it works.
They say there are some gold flakes suspended in some kind of cacao or coffee powder and only the gold will stick to the bonbon because of some hydrophobic process?
just take a look at the link and you will see.
updated by @dd: 08/20/16 09:48:22AM