Whisk the egg whites until stiff and put them aside.

In a bowl, whisk the egg yolks with the sugar and beat them with the whisk until a frothy mixture is obtained.
Then add the rum, brandy, cream and milk, always assembling everything with electric whips.

Now add the whipped egg whites incorporating them to the egg mixture, stirring with a wooden spoon with a movement that goes from the bottom up.

Put the eggnog in the glasses and sprinkle with cinnamon powder and a pinch of nutmeg.