In other searches I also found Mars Bar & Cinnamon flavoured vodkas - great
for those holiday parties!

"Flavoured vodkas are very easy, for a full bottle of vodka slice up four
mars bars into thin thin strips, empty about 1/2 the vodka out of the
bottle and put the mars bars in then top up with vodka. shake well and
leave for about 2 hours then shake again keep repeating untill smooth
and creamy. always shake before serving. for other flavours use the same
methord but in the case of spices such as chillies, cinnamon or clove
leave for at least a week in a warm area."

The Mars Bar one may be a pretty strange combination, but it tastes great (and
I'm told that it's a pretty hot seller at lounges these days).