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.

Unfortunately for diners with dietary preferences, even a humble french fry can contain ... that makes the fries unsuitable for vegans. But what about Burger King? While BK's fries don't contain ...