However, by 1900, the term referred to "wholesome drinks made with chocolate, strawberry, or vanilla syrups." By the "early 1900s people were asking for the new treat, often with ice cream." By the 1930s, milkshakes were a popular drink at malt shops, which were the "typical soda fountain of the period... used by students as a meeting place or hangout."
The history of the electric blender, malted milk drinks and milkshakes are interconnected. Before the widespread availability of electric blenders, milkshake type drinks were more like eggnog, or they were a hand shaken mixture of crushed ice and milk, sugar, and flavorings. Hamilton Beach's drink mixers began being used at soda fountains in 1911 and the electric blender or drink mixer was invented by Steven Poplawski in 1922. With the invention of the blender, milkshakes began to take their modern, whipped, aerated, and frothy form. Malted milk drinks are made with malted milk powder, which contains dried milk, malted barley and wheat flour. Malted milk powder was invented in 1897 by William Horlick as an easily digested restorative health drink for invalids and children, and as an infant's food.
The use of malted milk powder in milkshakes was popularized in the USA by the Chicago drugstore chain Walgreens. In 1922, Walgreens' employee Ivar "Pop" Coulson made a milkshake by adding two scoops of vanilla ice cream to the standard malted milk drink recipe (milk, chocolate syrup and malt powder). This item, under the name "Horlick's Malted Milk," was featured by the Walgreen drugstore chain as part of a chocolate milk shake, which itself became known as a "malted" or "malt" and became one of the most popular soda fountain drinks.
The automation of milkshakes developed in the 1930s, after the invention of Freon cooled refrigerators provided a safe, reliable way of automatically making and dispensing ice cream. In 1936, inventor Earl Prince used the basic concept behind the Freon cooled automated ice cream machine to develop the Multimixer, a "five-spindled mixer that could produce five milkshakes at once, all automatically, and dispense them at the pull of a lever into awaiting paper cups."
In the late 1930s, several newspaper articles show that the term "frosted" was used to refer to milkshakes made with ice cream. In 1937, the Denton Journal in Maryland stated that "For a 'frosted' shake, add a dash of your favorite ice cream." In 1939, the Mansfield News in Ohio stated that "A frosted beverage, in the vernacular, is something good to which ice cream has been added. Example par excellence is frosted coffee that hot, tasty beverage made chilly with ice and frosty with ice cream."
Research Source: Wikipedia
No need to drive and get a chocolate milkshake, you can make your own milkshake in your own kitchen.
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3 bananas, peeled and rough chopped
6 strawberries, hull
2 heaping tablespoons chocolate cacao powder
1 tablespoon honey
1/2 teaspoon Mexican vanilla blend
Add all ingredients to a blender, pulse until smooth. Pour into glasses. Enjoy!