LN2 is what you want for ice-cream making purposes; because it's so cold it flash-freezes your ice-cream mixture, giving very small ice crystals and a lovely smooooth texture.
Living in a house full of Imperial students, among them a PhD chemist, LN2 ice-cream was a staple of our parties. Quite how he managed to repeatedly transport a steaming dewar of liquid nitrogen from South Kensington to Putney on the bus without getting nicked - post 9/11 as well - I'm not entirely sure.