Take one drinking glass. Not huge, not tiny, something you might use to have a glass of water. A pub glass would work well.
Add a couple ice cubes.
Add vodka
and apple juice
in desired proportions. I've found a 60/40 split in favor of apple juice works well.
Stir in two drops of vanilla extract

and a small spoonful of brown sugar.

(the image search on that one was definitely more interesting than the others.)
Top with a shake of ground cinnamon.
The cinnamon won't mix in, it will stay at the top of the drink.
Enjoy! i am ...