Put the sealed 1/2 litre bag into the 1 litre bag.
Make sure the 1/2 litre bag gets buried in the ice.
Seal the 1 litre bag.
Shake the bags vigorously for 5 mins.
:- You might want to use a towel to hold them, since they will be very cold and slippery from condensation.
Remove the + litre bag, open it up and take a spoon!
:- Milk will provide a less rich, lower calorie ice cream, while using heavy cream will have the opposite effect.
This method will make a small amount of ice cream, about enough for two people to enjoy. Experimenting with other methods can allow you to make more. One version uses two coffee cans of differing sizes instead of plastic bags.
:- Flavor combinations are almost limitless. Chocolate syrup is a basic option, while various flavor extracts available in your grocery store`s baking section can lead to more exotic variations. Try combining mint extract with chocolate, or adding small chocolate chips.