Traditional eggnog is typically made with eggs, cream, sugar, rum, bourbon, brandy, whisky, and spices. It is a festive holiday beverage that can be served hot or chilled.  Classic eggnog is often made with milk or light cream instead of heavy cream, as well as less sugar. It also may have additional ingredients, such as brandy or rum, added to give it more flavor.  The classic version of the drink tends to be lighter in color and body than traditional eggnog. It's usually served chilled and is a popular accompaniment to many holiday meals.  Both versions are delicious, but traditional eggnog tends to be richer in flavor, while classic eggnog offers a lighter take on the traditional recipe.