Changes

[[File:Marco Polo traveling.jpeg|left|300px250px|thumbnail|Figure 1. Marco Polo has been credited with bringing ice cream to Europe.]]

[[File:5249494834 3b6f6c54c9 b.jpeg|thumbnail|300px 250px |left|Figure 2. Children eating ice cream in the Ottoman Era.]]

The 18th century saw the expansion of ice cream, where many shops and ice cream makers now operated. During the colonial period, ice cream was introduced to the United States, perhaps via Quakers who brought their recipe books with them as they came to the colonies. Ice cream soon caught on in popularity, as many of the founding fathers in the United States widely consumed ice cream. In the summer of 1790, George Washington spent $200 on ice cream. Thomas Jefferson had a well -known 18-step recipe for creating ice cream. In the inauguration of James Madison, ice cream was served to guests.<ref>For more on the early history of ice cream in the United States, see: DeWitt, D. (2010). <i>[https://www.amazon.com/gp/product/1402217862/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1402217862&linkCode=as2&tag=dailyh0c-20&linkId=6b9288a331b7873bafa0ece890e4603e The Founding Foodies: How Washington, Jefferson, and Franklin Revolutionized American Cuisine].</i> Naperville, Ill: Sourcebooks.</ref>

Around 1800, ice house insulation improved dramatically, which allowed them to be even colder. The improved technology expanded the number of ice houses. The wider presence of ice houses allowed ice cream to spread across the United States, Europe, and the Middle East in the early part of the 19th century(Figure 2). In the rest of the century, several technologies began to facilitate the production of ice cream. These included steam power, mechanical refrigeration, the homogenizer, electric power and motors, packing machines, and improvements in the freezing process.

It was during the 1870s that the sundae developed. At that time, the ice cream had now become prevalent. Experimentation on new ice creams was common, and one of these this added soda with ice cream and fruits and other sweet toppings. However, there was a backlash on eating such foods on a Sunday, a religious day, so the innovators took out the soda water, and the mixture of ice creams and toppings was eventually called the sundae, although it was spelled Sunday initially (changed to avoid criticism from religiously minded people).  The use of soda water with ice cream, however, did catch on. The ice cream cone was popularized in 1888 by Agnes Marshall in her recipe book, where she called these cones cornets. Likely, ice cream cones were already known, but her book did make the idea of ice cream cones more known, mostly because of her influence at the time in things related to cooking and food.<ref>For more on how flavors and types of ice creams developed, see: Funderburg, A. C. (1995). <i>[https://www.amazon.com/gp/product/087972692X/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=087972692X&linkCode=as2&tag=dailyh0c-20&linkId=2f5f9d5997d7c3a5ce30d3a44ab2b7e9 Chocolate, Strawberry, and Vanilla: A History of American Ice Cream].</i> Bowling Green, OH: Bowling Green State University Popular Press.</ref>