What Is a Slushie Machine?

A slushie machine is an appliance that chills a prepared drink and keeps it moving until some of the liquid turns into tiny ice crystals. What you get is soft and semi-frozen, pourable or sippable, rather than solid.

You will also see the same appliance sold as a slushy machine, a frozen drink machine or a frozen beverage dispenser. The name usually follows size: compact countertop units are pitched at home cooks and parties, while larger dispensers with taps serve cafes, bars and shops. A blender, by contrast, shatters ice cubes into a drink; here the freezing happens inside the machine, which is why the leading no-ice models, such as the Ninja SLUSHi Professional Drink Maker, skip the ice entirely and avoid watered-down flavor.

Most no-ice models rely on a compressor-based refrigeration system, the same basic idea as a refrigerator. It pulls heat out of the drink, and part of the water freezes into fine crystals as the mixture cools. Sugar and other dissolved ingredients stop the rest from freezing, so the mixture lands between liquid and solid.

Stirring is the other half of the job. A moving auger or paddle sweeps across the cold surface, which keeps crystals small and stops a hard layer from building up. Once the texture is right, the machine holds it there. Timing depends on the recipe, the batch size and how cold the drink starts; the Ninja SLUSHi Professional Drink Maker, for instance, lists a range of 15 to 60 minutes.

The parts are few, and each has a clear job in the freezing process.

Regular soda, juice and lemonade are the easy cases, and compatible mocktails usually work too. Sugar and alcohol both change how much of a drink freezes, so the recipe matters more than the drink's name; models such as the Iceman Slush-Ease 68oz Slushie Machine state that drinks must contain sugar to freeze properly. Wine and cocktails are possible on models built for them. See our recommendations on which wine slushie machine to buy.