Ice Cream Equipment / June 21, 2018 / Catherine Moreau
At the end of the freezing cycle (25 to 30 minutes, depending upon the quantity of the recipe), the ice cream will be frozen, but not as firm as you would like. You transfer the ice cream to an airtight container and put it in your refrigerator's freezer compartment for two to three hours. The unit I have used most is the single-bowl Model CIM-20 Cuisinart, which is pictured on this page. It makes up to one and one-half quarts of ice cream, sorbet or frozen yogurt, and I recommend it. It is not terribly noisy, but remember that it will be on continuously for up to a half hour, so if noise bothers you, take it in a room where you can shut the door and let it do its thing without getting on your nerves. If you planned on listening to music or watching television while it runs, I'd definitely put it in a different room.
The principle used by these machines is quite simple. The actual freezing is accomplished in the unit's freezer bowl, which contains a cooling liquid between a double-insulated wall. The bowl must be extremely cold before it can freeze anything, so you put the bowl in your freezer, preferably for at least 12 hours. (My original unit came with an extra freezer bowl, so I keep both bowls in the freezer at all times so I can make ice cream whenever the notion strikes me.)