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Smitten Ice Cream's special ingredient? Liquid nitrogen (video)

San Francisco ice cream maker Robyn Sue Fisher shows SmartPlanet how a machine called "Kelvin" uses liquid nitrogen to whip up ice cream made to order.

My old boss used to jokingly refer to gelato, my most favorite frozen treat, as "San Francisco ice cream."

Smitten Ice Cream, founded by Robyn Sue Fisher, truly is San Francisco ice cream and the best part is that it's made to order. She does it with the help of a patented invention dubbed "Kelvin," which uses liquid nitrogen to whip up the ice cream. Watch the machine in action in this video from SmartPlanet and prepare to get a craving.

This video originally appeared on SmartPlanet with the headline "How liquid nitrogen is changing the future of ice cream."

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