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Step 1: Watch the Video!
Step 2: Dry-Ice (With a Fire Extinguisher??)
Step 3: What You'll Need
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.
Step 4: Add the Cold
The dry ice cools the liquid mixture to the point where it takes on the familiar qualities of ice cream.
BE CAREFUL! If you add too much dry-ice all at once, your ice cream mix will bubble over and spill out all over your counter. This makes a very big mess, so avoid the hassle by adding dry ice in moderation, as the mix needs it.
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.
Step 5: Ready to Serve!
When you are convinced there are no more chunks of dry ice in the mix, and no more vapor is rising from the ice cream, it's a pretty safe bet that all the dry ice has sublimated out.
The awesome thing about using a cooling medium like dry-ice in the mix is that it doesn't leave behind any watery residue in the mix. It all just vaporizes out, leaving the chilled ice-cream behind.
When you're sure it's safe to eat, go ahead and transfer it to a cone or a dish for serving.
You've just created a carbonated ice cream cone! That means it's slightly fizzy and will tingle your tongue a bit.
Step 6: Enjoy!
Well now you know how to make a delicious carbonated ice cream in a way that's appropriate for halloween, but fun any time of the year.
If you liked this project, perhaps you'll like some of my others.
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Here's the video again in case you missed it.