This is a sure fire way to make the best eggnog possible:
2- 1/2 gallons vanilla ice cream - allow to completely melt in their containers and then pour into a large bowl
16 oz brandy
16 oz white rum
1 quart milk
2 tbsp cinnamon, 1 tbsp freslhy ground nutmeg
Combine all indients and chill for a couple of hours. Garnish with additional freshly grated nutmeg prior to serving.