Ice Cream In A Bag

Ice Cream In A Bag

Make delicious ice cream in a zip lock bag using just a few simple ingredients.

Suitable for kids aged 6+

You Need:

  • 1 tablespoon of sugar
  • cup of milk
  • teaspoon of vanilla essence
  • 6 tablespoons of rock salt (or use regular table salt as a substitute)
  • 2 cups of ice
  • 4 litre zip lock bag (approx. size)
  • litre zip lock bag (approx. size)

What to do:

  1. Half fill the 4 litre zip lock bag with ice (about 2 cups).
  2. Add the salt and seal the bag.
  3. Pour the sugar, milk and vanilla essence into the litre zip lock bag and seal securely.
  4. Open the large zip lock bag and place the smaller bag inside. Seal the large bag.
  5. Shake and rock the large bag for 10 to 15 minutes. It may help to wear gloves or wrap a tea towel around the bag to protect your hands from the cold.
  6. After enough shaking the mixture in the small bag will become ice cream and is ready to eat. Enjoy!

Why is it so?

When salt is added it lowers the freezing point of the ice. Thus, it takes more energy to be absorbed from the surrounding environment for the ice to melt. This effectively makes the ice colder than it normally is and freezes the ice cream mixture more efficiently. Larger crystals of salt, like rock salt or ice cream salt, take more time to dissolve in the water around the ice and allows for even more cooling of the ice cream.