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Our generic drawing of a countertop slush machine — not a picture of this model.

Ninja · Countertop slush machine

Ninja SLUSHi with SlushAssist Technology

A one-button version of the SLUSHi: instead of presets, SlushAssist senses what you have poured in and adjusts the temperature itself. Same 1.9-litre maximum fill as the original.

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At a glance

1.9 litresmaximum liquid fill (cup filled to scale against 3.31 litres)

15 minfastest freeze the maker claims: “liquid to slush in 15 to 60 minutes, depending on ingredients, volume and starting temperature”

1

programmes / presets

16%

highest alcohol strength the maker allows

Spec sheet

Model numbers
FS351UK (e.g. FS351UKBR Mocha)
Type
Countertop slush machine
Vessel size
2.6 litres
Maximum liquid fill
1.9 litres
Servings (maker)
Up to 7 × 260 ml
Alcohol
Cocktails containing up to 16% alcohol (Ninja comparison table)
Minimum sugar
Must include sugar or sugar alternatives (Ninja). Ninja’s published figure for the original SLUSHi is at least 4%.
Freeze time (maker’s claim)
liquid to slush in 15 to 60 minutes, depending on ingredients, volume and starting temperature
Keeps drinks frozen (maker’s claim)
Up to 12 hours, for recipes excluding dairy
Dimensions (as listed)
41.35 × 16.56 × 42.98 cm (L × W × H, as listed by Ninja UK)
Weight
12.18 kg
Cleaning
Built-in rinse cycle
Programmes
  • SlushAssist one-touch mode (senses ingredients and adjusts)
In the box
  • Motor base with WhisperChill compressor
  • 2.6 L vessel with pour handle (1.9 L max liquid fill)
  • Auger system
  • Condensation catch
  • Two-piece drip tray

Figures are as published by the maker; freeze and hold times are the maker’s claims and depend on ingredients, volume and starting temperature.

Our notes

Strengths

  • No preset to choose: one button and the machine adjusts to the drink
  • Built-in rinse cycle for quicker clean-ups
  • Same 1.9-litre maximum fill as the original

Worth knowing

  • Ninja’s comparison table lists no preset programmes, so you rely on SlushAssist (plus 10 temperature controls)
  • Still needs sugar — diet drinks won’t slush
  • We couldn’t find a UK listing on Amazon.co.uk when we checked (4 October 2026)

Who it suits

People who want slush without thinking about settings, in the same size as the original SLUSHi.

Where these figures come from

Checked:

Recipes to try in it

Cola & fizzy

Cola slush

The simplest slush there is: pour in a full-sugar cola and press start. Diet cola won’t work — here’s why.

7 × 257 ml