Searching for my past...
There was a time when I could eat a candy bar and not find it clinging to my chin the very next day.
In that era - at least 30 years ago, my fave was something I believe was made by the Mars Candy Company, but not sure... it was a single candy bar, covered with chocolate, but the inside was an assortment of pieces of candy, generally always a large nut, caramel, perhaps a toffee piece, and several creams... all in a single bar about 3" x 2". Seems like the name contained the word 'Avenue'.
Does this ring any bell? If so, tap back and tell me what it was and if its still possible to find it.