Ice cream

Ice cream (originally iced cream) is a frozen dessert made from dairy products such as cream (or equivalents), combined with flavourings and sweeteners. This mixture is super-cooled by stirring while reducing its temperature to prevent large ice crystals from forming. Traditionally, the temperature has been reduced by placing the ice cream mixture into a container that is immersed in a mixture of crushed ice and salt. The salt allows liquid water to be below the freezing point of pure water, allowing the immersed container with cream to make better contact with the melted water/ice mixture.

Using liquid nitrogen

Adding liquid nitrogen with the rest of the ingredients and stirring vigorously produces a very smooth ice cream. The preparation is spectacular, since it results in a column of white condensed vapor, reminiscent of movie depictions of witches' cauldrons. The result, due to the extreme rapid cooling of the mixture, is a very smooth ice cream containing only small ice crystals.

Related Topics:
Liquid nitrogen - Witch

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Warning: Nitrogen will displace breathable oxygen in the air when boiled. The use of a large quantity of liquid nitrogen in an inadequately ventilated space poses a possible suffocation risk. As long as the liquid nitrogen has completely vaporized, the remaining nitrogen bubbles are perfectly harmless, since nitrogen is the major component of air. Note that the nitrogen used in laboratories may have been contaminated by possibly harmful chemicals. Furthermore, care has to be taken not to leave chunks of very cold ice inside the mix. See .

Related Topics:
Oxygen - Air

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