Cole, sorry, good question. KW are the initials of the dinner guest who is a HUGE Chartreuse fan.
The digestive served rather blindly was the Chartreuse VEP Green.
The Chartreuse was a big hit, especially since some of the mignardises were chocolate...and also since KW can be a riot when he is so inclined as he was with this offering in his honor.
. . . . . Pete