I've been relieved to find that my local Asian markets have a wide array of imported chocolate, candy, and snacks. American chocolate, in particular, is made so cheaply that it's not even pleasant, anymore. I used to find a Snickers and 5th Avenues a great "guilty pleasure" now and then...but, the last couple I've eaten tasted like wax and corn syrup and not much else. I'm certain the actual food content has declined dramatically since my childhood (I was trick or treating in the 80s), and has been replaced by food-like substances that don't taste as good and are worse for my health.
The ammonium chloride that Linus writes about is the salt that gives the taste to these candies. Like someone else in the comments there, I have to advocate another Finnish spice: tar.