This recipe is stout to the occasional-drinker, but mild to the frequent-drinker. Adjust the liquor accordingly. Three months after making this and keeping it stored in the refrigerator, the flavor was still awesome and fresh!
Pour the brandy, sherry, rum, and whiskey into a bowl.
Place the egg yolks and egg whites into two separate, large mixing bowls. Set the egg whites aside. Beat the egg yolks until light and frothy. Gradually beat in the sugar until the egg mixture is light colored. Slowly beat in the liquor mixture. With the mixer still running, pour in the milk and heavy cream until thoroughly blended.
Using a clean beater, beat the egg whites until soft peaks form. Gently fold the egg whites into the milk mixture. Pour into two clean, gallon-size plastic milk containers. Refrigerate at least 5 days, or 10 days for an even smoother taste. Shake the container occasionally to keep the alcohol from separating.
To serve, pour the eggnog into a punch bowl. Whisk to blend milk mixture, add the quart of vanilla ice cream, and garnish with nutmeg. You can shape the ice cream in several molds, and use them one-at-a-time to chill the eggnog throughout the evening.
1 quart premium vanilla ice cream, for serving
1 tablespoon freshly grated ground nutmeg, for garnish