Bronson Van Wyck shares a family recipe for classic Christmas eggnog.
Beat egg yolks together in a large bowl; whisk in sugar until well combined. Slowly whisk in whiskey, rum, and brandy until fully incorporated. While whisking, slowly add 4 cups heavy cream and whisk until well combined. Transfer to refrigerator until chilled, at least 2 hours.
In the bowl of an electric mixer fitted with the whisk attachment, beat egg whites until stiff. Fold into chilled liquor mixture. Add remaining 2 cups heavy cream to mixer and whisk until soft peaks form. Fold into liquor mixture. Transfer to a large punch bowl or serve in individual glasses. Sprinkle with nutmeg before serving.