It serves for one person. Start by preparing two shots of espresso. I use my Caffisimo at home, but you can make a strong coffee instead, if you do not have an espresso machine. Then add less than half a tea spoon (see last picture for my tea spoon, I think they vary in size in different countries) of cinnamon. It really has a strong taste, even stronger than espresso.
Then add two dessert spoons of vanilla syrup (again, see the last picture). If you do not have any, you can try using vanilla extract. Add enough milk to fill the cup. If you aren't using warm milk, you may want to add cocoa powder and mix first.
Add a dessert spoon of cocoa powder.
Now take your chair, look out of the window and preferably watch it raining or snowing while enjoying your coffee.