This version of the American Eggnog is very potent, even if you cut the rum in half! Alternatively, you can use brandy or bourbon, I like it best with rum.
Beat the egg yolks and sugar, add milk and rum and whisk until the sugar is completely dissolved. Most of the time I add a pinch of nutmeg here. Put the mixture in the refrigerator for at least 3 hours.
Whip the cream and fold into the mixture and refrigerate for another hour.
It is best served in cups with a pinch of grated nutmeg on top.