August 6th is National Root Beer Float Day: a type of ice cream float (a.k.a. ice cream soda) that combines ice cream, usually chocolate or vanilla, with root beer.
Just place a couple of scoops of ice cream in a tall glass, add the root beer, and serve with a straw and a long spoon (photo #1). Yum!
You can do this with any flavor ice cream and any coordinating soda. There are some ideas below.
Credit for the invention of the ice cream float was invented by Robert McCay Green, operator of a soda fountain in Philadelphia, Pennsylvania. In the era before bottled soft drinks, a soda fountain was a place where people would stop by for a fresh-jerked soda.
The “soda jerk” would add syrup to a glass, then jerk the handle of the soda water [carbonated water] tap. The pressure blended the soda, although a swirl with a spoon finished the job.
Green wanted to create something special to compete with a larger, fancier soda fountain down the street. His brainstorm: a combination of vanilla ice cream and soda water with a choice of 16 different flavored syrups. He called it an “ice cream soda.”
A variation of the story is that, on one hot day, Green ran out of ice for his soda fountain drinks and used vanilla ice cream from a neighboring vendor, has been put to rest by his own account, published in Soda Fountain magazine in 1910 (source).
Alas, in those days small business owners were not trademark-oriented, and the competitors soon knocked him off.
As the ice cream soda soda concept took off, different fountain syrups were used: birch beer, cola root beer and fruit-flavored soft drinks.
Bottled soft drinks became broadly available by 1950, enabling consumers to mix and match their own floats. Some examples of the variety:
Add an ounce or two of your favorite spirit, and have as much liqueur. One of our favorites: banana ice cream, vanilla soda, rum and banana liqueur.
 A root beer float given the glamour treatment with whipped cream and a cookie (photo ShagPhoto | IST).
 Ice cream floats with fruit sodas (photo courtesy of Alanna Taylor Tobin | The Bojon Gourmet).
You can also make a beer float:
Modern soft drinks would not exist, had carbonated water not been invented. Here’s the history of carbonated water, which was first sold commercially in the late 1700s; and the debut dates of early soft drinks.
Root beer, at least in its earliest, noncarbonated form, long predates carbonation.
Emigrants to the New World found Native Americans drinking beverages made of sassafras root and sarsaparilla vine, for culinary and medicinal reasons American culture.
By the 16th century, colonists were using European culinary techniques to create it, and other root- and herb-based beverages.
Ingredients could include, among others, allspice, birch bark, burdock root, dandelion root, coriander, juniper, ginger, hops, licorice, molasses, sarsaparilla, sassafras root, vanilla beans, wild cherry bark and wintergreen.
With the spread of soda water/carbonated water in the early 19th century, the technique was applied to these traditional beverages. Sweet syrups were the foundation of soda fountains, and it was combined with soda water as early as the 1850s.
Drinks like root beer were also sold as “tonics,” for their perceived medicinal qualities. The syrup was added to a glass, topped with carbonated water and given a brief stir.
Modern, commercially-produced root beer (and other sodas) is typically sweet, foamy, carbonated, nonalcoholic, and flavored with artificial* sassafras oil
*Sassafras root is still used to flavor traditional root beer. However, sassafras is no longer used in commercially-produced root beer since 1960, when it was banned by the FDA for use in commercially mass-produced foods and drugs. There were health concerns, highly controversial, about the carcinogenicity of safrole, a major constituent of sassafras oil, in animal studies. Some small-batch root beers do use a safrole-free sassafras extract.
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