Take a Bordeaux. Meassure it. Pour the Bordeaux in mugs so that you have exactly the amount of Glühwein that you like, ie. for each person 2 mugs.
Why Bordeaux? Of course it can be another wine, too, but it shouldn't be a too bad one (of course also not Bordeaux 1900). Think of your head the next day.
Pour the wine in a pot add 2 teaspoons of sugar for each mug, add grinded cinnemon and also grinded cloves. Use the cloves carefully because they have a rather strong taste. Heat the wine, but do not boil it.
I do not filter the wine. I like it when the wine is a little bit "dirty" because of the spices.
I tastes good. I would say that I will take a bit more sugar and less cloves the next time, but it's fine.