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On National Chocolate Milkshake Day, Let's Drink to Chicago's Prohibition-Era Entrepreneurs

What the rise of the milkshake had to do with Prohibition, Chicago's South Side, and a local pharmacy chain called Walgreens.
We may have Chicago to thank for trendy, boozy milkshakes like the "Irish Violet Crumble"—whiskey, Baileys, vanilla ice cream, and dark chocolate.
We may have Chicago to thank for trendy, boozy milkshakes like the "Irish Violet Crumble"—whiskey, Baileys, vanilla ice cream, and dark chocolate.Nathan Jones/Flickr

Happy National Chocolate Milkshake Day!

OK, it's a "holiday" whipped up by the dairy lobby. But it’s also an excuse to remember Prohibition-era Chicago's role in creating this frothy favorite.