Liquid Nitrogen Ice Cream

Directions

1. 1
   {"0":"Place three cups of the milk in a saucepan with the vanilla bean over medium-low heat.","2":"Meanwhile, pour the remaining 1 cup milk into a large glass measuring cup. Add the sugar and the cornstarch. Mix well.","4":"When the milk starts to simmer, remove it from the heat and pour in the cornstarch mixture, stirring the whole time. Return the saucepan to medium-low and stir, stir, stir, until things start thickening up, 10 to 12 minutes. It should end up thicker than, say, a runny milkshake, but thinner than a frosty one.","6":"Pour the mixture through a strainer into a mixing bowl, whisk in the vanilla extract, and let it cool on the counter for 20 minutes or so. I like to then chill it in the refrigerator for a few hours or overnight until it is completely chilled.","8":"Now you are ready to place this mixture in a metal-bowl mixer and do the liquid nitrogen thing (see above links and do your safety reading and research first), or you can just freeze this using the manufacturer's instructions on a standard ice-cream maker."}