Instant Ice Cream
Desserts
- 1 tin (400 g) sweetened condensed milk
- 1 tin (410 g) evaporated milk - cold
- 250 ml cream, also cold
- 5 ml vanilla essence
- aprox. 2 l liquid nitrogen
Method
Warning!
Use safety goggles and a pair of gloves (not plastic - you gardening gloves or oven mittens will do) while adding the nitrogen to the ice cream mixture. Use a wooden rather than a metal spoon to stir the mixture while adding the liquid nitrogen.
- Beat the evaporated milk until thick and creamy.
- Add the sweetened condensed milk and vanilla essence to the evaporated milk.
- Beat the cream until thick and creamy.
- Fold cream into mixture and place mixture into a large metal container.
- Put on your gloves and slowly and gradually ...
| add the nitrogen and | stir well ... | until mixture is frozen. |
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Walter Meyer making ice
cream for the "UP with Science" students at the
University of Pretoria
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Makes approximately 2 litres of Ice Cream (8-10 Portions)
Recipe from Walter Meyer, Department of Physics - University of Pretoria.
This is a real fun and edible "Physics Experiment".
Here some additional information:
Nitrogen makes up about 78% of our atmosphere. It is a colourless,
odourless gas that liquifies at -195°C. Liquid nitrogen is readily
available commercially and used in science laboratories and by doctors
to freeze warts and minor skin abnormalities. For more information go
to www.webelements.com/webelements/elements/text/N/
Here are the formulas for the calorimetric calculations: