Historians argue over the originator of the ice cream sundae, three historical probabilities are the most popular.
Origins of the Ice Cream Sundae - Version One - Evanston, Illinois
In the midwestern parts of United States, laws were once passed that prohibited the selling of soda water on a Sunday. The town of Evanston, Illinois was one of the first towns to pass such a law around the year 1890. As an alternative on Sundays, local soda fountains started selling ice cream sodas minus the soda, which left only the ice cream and syrup. That became the recipe of what was to become know as the ice cream sundae.