Chefs Janos Wilder and Devon Sanner of [Downtown Kitchen + Cocktails] ( demonstrate a style of cooking that uses liquid nitrogen.

Above, the chefs make a root beer float.

The recipe consists of root beer ice cream with vanilla soda, birch caramel and whipped cream.

The root beer ice cream is made with liquid nitrogen, the carbonated water is made with dry ice, and the whipped cream is made from a canister with nitrous oxide.

Downtown Kitchen + Cocktails is located on 135 S. 6th Avenue.