Black Vodka is made by infusing catechu extract into the vodka. The resulting vodka has a deep purple - black color but not a change in taste.
Take 4 oz of cranberry juice and put it in a sauce pan and reduce by half. Allow to cool.
Add in the reduced cranberry juice, black vodka and orange juice into a cocktail shaker. Fill with some ice. Add in the color if using.
Give it a hard shake for 15 to 20 seconds.
Add a bit of dry ice into the martini glass and pour the drink over it.
Serve immediately topped with some sugared cranberries
Notes :
1)To increase the cranberry flavor, you could boil some fresh cranberries with the juice while making the reduction.
2)If the color of your drink is not a true black, reduce or omit the orange juice or add a hint of edible black color.