About 20 years ago, I used to get these chocolates from Helen Grace called "meltaways." They would melt really quickly in your mouth, and they were really smooth.
Just yesterday, I tasted a German chocolate called Edel Nougat and it had a very similar texture, but these had hazelnut added in.
I absolutely love this stuff! Can anyone recommend a good mail-order source for these types of "melty" chocolates?