Wiki article on this topic: Eggnog , egg nog or egg-nog, historically also known as milk punch or egg milk punch, is a rich, chilled, sweetened, dairy-based beverage. It is traditionally made with milk, cream, sugar, whipped egg whites, and egg yolks. In some contexts, distilled spirits such as brandy, rum, whisky or bourbon are added to the drink.
Throughout Canada and the United States, eggnog is traditionally consumed over Christmas season every year, from late November until the end of the holiday season. Eggnog has also gained popularity in Australia. A variety called Ponche Crema has been made and consumed in Venezuela and Trinidad since the 1900s, also as part of the Christmas season. During that time, commercially prepared eggnog is sold in grocery stores in these countries.
Eggnog is also homemade using milk, eggs, sugar, and flavorings, and served with cinnamon or nutmeg. While eggnog is often served chilled, in some cases it is warmed, particularly on cold days. Eggnog or eggnog flavoring may also be used in other drinks, such as coffee and tea, or to dessert foods such as egg-custard puddings.
The Modern Bartender's Guide from 1878 lists many variant names for the drink. It distinguishes "plain egg nog", "egg milk punch", and "milk punch" from one another. It also includes variants such as "Baltimore egg nog", "General Jackson egg nog", "Imperial egg nog", two types of "sherry cobbler egg nog", as well as "sherry cobbler with egg", "mulled claret with egg", "egg sour", and "Saratoga egg lemonade".
The origins, etymology, and the ingredients used to make original eggnog drinks are debated. According to the Oxford English Dictionary, nog was "a kind of strong beer brewed in East Anglia". The first known use of the word "nog" was in 1693. Alternatively, nog may stem from noggin, a Middle English term for a small, carved wooden mug used to serve alcohol. However, the British drink was also called an Egg Flip, from the practice of "flipping" the mixture between two pitchers to mix it. One dictionary lists the word "eggnog" as being an Americanism invented in 1765-75.