Setting the scene
Late-nineteenth-century soda fountains faced blue laws banning Sunday soda sales in towns like Evanston, Illinois; druggists and confectioners improvised ice cream served with syrup and toppings instead of carbonated phosphate drinks.
What happened
The ice cream sundae emerged around 1881 in the U.S., with Ithaca, New York, and Two Rivers, Wisconsin, both claiming the first chocolate-syrup topped scoop named either for Sunday or spelled 'sundae' to appease churchgoers.
Why it still matters
Two towns still claim the origin story in civic festivals and historical markers; the sundae standardized American dessert culture, spawning banana splits, hot fudge, and chain diners' endless flavor combinations.
Background
Two towns still claim the origin story.