Sugar controls the texture. Aim for roughly 120–160 g of sugar per litre of mix — too little and it freezes solid, too much and it never sets.

Pro tips for perfect slush
Everything we know about sugar ratios, alcohol limits, machine technique and serving — condensed into 16 essential tips.
The Science
Diet and sugar-free drinks won't slush properly — the machine needs about 8 g of sugar per 250 ml. Help them along with a splash of syrup or juice.
Alcohol works like antifreeze. Keep the whole batch below about 10% ABV — roughly 1 part spirit to at least 3 parts mixer — or it will never freeze.
Machine Technique
Cold in, cold out. Chill juices, milk and syrups in the fridge first — cold ingredients freeze faster and give a smoother texture.
Give the machine a head start: let it run and chill for 10–15 minutes before pouring in the mix, so the bowl is already cold.
Never fill past the max line — the paddles need room to churn the slush evenly.
Blend chunky ingredients (fruit, candy bars, cookies) into a smooth liquid before adding them — the machine churns, it doesn't crush.
Using fizzy drinks? Let them go flat first (or stir the bubbles out) — carbonation expands and messes with the texture.
Be patient with big batches or warm rooms — the first beep can mean 'frozen enough', not 'as thick as it gets'. Let it churn longer for a firmer slush.
Troubleshooting
Too thin? That's usually too much water or too little sugar — stir in a little syrup or juice and let it keep churning.
Frozen rock-hard or grainy? Add a splash of room-temperature liquid and lower the freeze level a step.
Always stir the mix well before pouring it in — otherwise syrup can sink to the bottom and freeze unevenly.
Serving & Care
Use the temperature arrows to tune the texture — down for a sippable slush, up for a thick, spoonable one.
Keep the program running until every glass is poured — the slush dispenses more easily and cleanup gets much simpler.
Add zest, garnishes and toppings after freezing, straight into the glass — full aroma without watering anything down. Chilled glasses keep it slushy longer.
Rinse and clean right after use — dried residue is stubborn and can affect the taste and texture of the next batch.