![]() To increase the rate at which the dry ice is able to cool the surface of the cold plate the section of the towel directly on top of the dry ice is wet with some high proof vodka (100 proof or better) or rubbing alcohol. The towel I'm using to cover the block in the above images is perhaps a bit excessive, a small hand towel one or two layers thick over the block should be fine. This further improves efficiency by insulating the sides of the dry ice and will prevent the cold plate's surface from sliding around when the ice cream is being made. A second towel now covers the block of ice and should be tucked into the baking pan to keep the block centered. This will serve to both protect the table from the extreme cold and will also increase the efficiency of the cold plate.Ī block of dry ice is then placed in the center of the pan, approximately 3-5 lbs should be adequate. The first step in assembling the cold plate is to place a towel below a large baking pan to insulate it from the table.
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