The enticing tastes of the holidays can leave you with more pounds than you had before the festive season. Typical eggnog, for instance, can load your system with 254 calories and 19 grams of fat for every cup you consume. You can find ways of enjoying this rich and sweet beverage, however, without giving up healthier options. By substituting ingredients in the traditional eggnog with less fatty choices, you can make a low-fat and tasty holiday drink.