Snow cones are a variation of shaved ice or ground-up ice desserts commonly served throughout North America in paper cones or foam cups. The dessert consists of ice shavings that are topped with flavored sugar syrup.
Depending on the region of North America, the terms "snowball" and "snow cone" may refer to different things. Where the distinction is made, the former refers to a dessert made of finely shaved ice ("like soft fresh snow"), while the latter contains ground-up ice that is coarser and more granular ("crunchy").
In the 1850s, the American Industrial Revolution made ice commercially available. Ice houses in New York would commonly sell ice to places like Florida. To transport the ice to Florida, the ice houses would send a wagon with a huge block of ice south. The route to Florida would pass right through Baltimore.
In Baltimore, children would run up to the wagon and ask for a small scraping of ice. Before long, mothers started to make flavoring in anticipation of their children receiving some ice. The first flavor the women made is still a Baltimore favorite: egg custard. Egg custard was an easy flavor to make as the only ingredients were eggs, vanilla, and sugar.