FWIW, I found the following reference on an "American Airlines specifications index" on the LSG Sky Chefs website:
GRAPHICS ITEM 0000466
DESCRIPTION MISC-FC BUTTERSCOTCH TOPPING
EFFECTIVE DATE 01-MAY-2011
http://customers.lsgskychefs.com/psm...OM%20INDEX.pdf (
see page 1 of 5, line 3).
I lost my secret decoder ring, but I respectfully submit the above for the FT hive mind's consideration.