Eggnog can trace its roots to a hot cocktail known as posset . All of that changed in the American colonies , though . In 1800 , the American recipe for eggnog consisted of milk , eggs , rum , and sugar . George Washington 's recipe included 3 types of booze : rye whiskey , rum , sherry . The drink was called posset because it had three ingredients in one liquid.
Eggnog can trace its roots to a hot cocktail known as posset . In 1800 , the American recipe for eggnog consisted of milk , eggs , rum , and sugar . George Washington 's recipe included 3 types of booze : rye whiskey , rum , sherry . The drink was called posset because it had three ingredients in one liquid.