Illinois is home to the first ever Dairy Queen in the United States! Though Dairy Queen now operates over 7,700 locations with more than 250 of those being in Illinois, DQ came from humble beginnings.

The key to Dairy Queen’s early success was the development of their unique soft serve. Developed by John Fremont McCullough and his son Alex, the soft serve was first put to market at an ice cream store in Kankakee, selling more than 1,600 servings in its first day. Inspired by the success, McCullough partnered with the ice cream store and went on to open the first Dairy Queen in Joliet in 1940. The store in Joliet was so successful it began the run of a mainstay in the American fast food market.

After its initial success, DQ expanded to a franchise model that grew to 100 stores by 1947, more than 1,400 by 1950 and 2,600 in 1955. A rapid success, soft serve ice cream is now a symbol of American culture and a classic pastime.

Still a designated landmark today, the original Joliet Dairy Queen serves as a testament to Illinois’ innovation and sweet success.