Double dipping.

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What's better than a refreshing scoop of ice cream, frozen yogurt, or sorbet? That's easy--two scoops. Thanks to the Flavor Duo Frozen Yogurt-Ice Cream & Sorbet Maker from Cuisinart, Stanford, Conn., you can whip up two different containers of your favorite cold treat in your own kitchen. Forget those days of arm-wrestling a stubborn crank and working with messy rock salt in home ice cream makers. The Flavor Duo is simplicity itself, effortless and neat to handle.

The key to the operation is a pair of stainless steel freezer bowls that contain a cooling liquid between their double insulated walls. The first step is to stick the bowls into the freezer until the liquid is completely frozen, a process that takes between six and 22 hours, depending on the freezer's temperature. Then place the bowls in the base and insert the mixing arm. Press the "on" button to start the bowls rotating; pour the ingredients in through the top spouts; and then sit back and watch as your dessert freezes. The latter process takes roughly 20-30 minutes, depending on the desired consistency, and can be observed through the transparent lid. Should you want a firmer consistency, pour the blend into an airtight container and pop it into the freezer for a couple of hours.

In addition to the three types of desserts cited in its name, this wondrously dexterous machine churns out a...