Carbonated ice cream? ...Really! And here's how to make it with a few simple ingredients, and a bit of dry-ice
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Dry Ice is extremely cold! (-78C/-109F) and can cause instant frost-bite to exposed skin. This project should not be attempted without adult supervision and adequate training. Ingestion of dry-ice can cause serious internal tissue damage. If Dry Ice is ingested, drink copious amounts of warm water as soon as practical. Misuse, or careless use may result in serious injury. Use of this video content is at your own risk.
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**A couple of points I probably didn't clarify were 1. That there is no dry ice left in the mixture when the ice cream is done, and 2. My wife and I had already eaten the majority of the batch before we gave it to our kids to test out for themselves. I hope that helps those of you who had concerns.
This simple vanilla ice cream recipe is easy, and delicious!
2 cups Half & Half
1 tsp Vanilla Extract
1/2 Cup Powdered Sugar
Note: Half & Half is a dairy product consisting of half light cream and half milk. If you have heavy whipping cream and milk, you can make half and half by combining four parts whole milk with one part heavy cream. If you only have light whipping cream, use three parts whole milk and one part light whipping cream.
Mix all ingredients together, and add some cold. (In this case, dry ice!)
The dry ice cools the liquid mixture to the point where it takes on the familiar qualities of ice cream.
I love this method because it adds a mysterious flowing fog quality to the process that's very visually stimulating, and gratifying.
When the fog stops, the dry ice has most likely all sublimated out, but be careful when eating, and watch for any small pieces that may have been missed, and avoid eating them. Because the CO2 sublimates directly into a gas, it's very clean and doesn't leave behind any residue.
Dry ice is solid CO2, and as it sublimates through the mix, it forms carbonic acid with some of the water in the mix, giving the ice cream the familiar fizzy carbonated taste that we associate with soda.
Dry ice from fire extinguishers?
In some cases, yes!. Select fire extinguishers utilize CO2 as the medium for suppressing fires. These types are mainly found in restaurant kitchens, mechanical rooms, and in areas that hold sensitive equipment like computers.
CO2 fire extinguishers are usually charged with food grade CO2 and are referred to in terms of pounds. For example, a 5lb CO2 extinguisher is charged with a 5 lb weight of liquid CO2. The extinguisher is then highly pressurized.
CO2 fire extinguishers are marked with stickers, or holes punched in the servicing labels. They also have unusually large discharge horns, and no pressure gauges.
You can see how to make Dry Ice with a CO2 Fire extinguisher in this video: youtu.be/tLNHDxd6nDc