I didn't have and Galliano Coffee Liqueur, so it was a toss up between Kahlúa and Mr. Black. Since there's already enough sweetness with the Grenadine and Frangelico I opted for the latter.
Grenadine hits you first and threatens to drown out everything else, but then the hazelnut and eventually the hint of coffee come through. The booze is gone in the cacophony of sweet flavours.
This would work well in the garden on a sunny autumnal evening.