
Every March, McDonald's fans eagerly await the return of their minty green seasonal favorite. The shamrock shake has become such a St. Patrick's Day tradition that it's hard to imagine a time before this creamy green sensation existed. When did McDonald's first introduce customers to their now-iconic shamrock shake?
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Correct Answer: 1970
While one creative Connecticut McDonald's owner invented the shamrock shake in 1967, McDonald's didn't share the luck of the Irish with the rest of America until 1970. The original shake wasn't even the minty green masterpiece we know today. It was a vanilla shake mixed with lemon-lime sherbet that kind of looked like a science experiment gone wrong. McD's finally nailed the recipe a few years later when they switched to the simple combo of vanilla ice cream and mint syrup.
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