I couldn't find anything that resembles what you are looking for, but there is
a French clear liqueur that is drunk straight or with a little water. It is
also available in the US and I believe it taste like licorice. When it come
in contact with water it clouds up. so a little moisture or water on your
finger would do the trick.
I do not know if it is Anisette or Pernod or exactly what the liqueur is.
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I came across about 20 different recipes for a snowflake and didn't even touch
the surface. I Thought this one looked a little interesting.
http://www.thepartymix.com/Recipes.ASP?d=157
Snowflake
Ingredients
1/2 fl. oz. Vodka
1/2 fl. oz. Daily's Blue Hug
Plate of sugar
Directions
Take a shot glass dip the rim of the shot glass in the plate of sugar. Fill
1/2 of the shot glass with Daily's Blue Hug and 1/2 with Vodka. When the drink
hits the rim, the sugar will fall from the rim and looks like snowflakes in
the drink. ENJOY