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It took 10 years of research and a little magic, but Burger King has developed a crinkle-cut french fry it claims has 30 percent less fat and 20 percent fewer calories than its traditional fries.

In a blind taste test, we had Business Insider employees try french fries from McDonald's, Wendy's, Shake Shack, Chick-fil-A, and Burger King. The winner was pretty clear. Produced by Emma Fierberg.