Scoop&Slush

Sugar Free Diet Soda Slush

Diet soda gets the full slush treatment. Lemon brightens it, liquid allulose keeps the crystals soft, and the machine turns the bubbles into a proper frozen treat.

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Sugar Free Diet Soda Slush
Ninja SlushiPrep
5 minProcessing
20 to 50 minMakes
Up to 8 servings

Why you’ll love this

Your favourite diet soda, turned into a proper frozen treat with no sugar at all; the lemon keeps it bright, the texture stays soft and scoopable, and the bubbles give it that familiar fizz in slush form. It suits everyday cravings, movie nights, and anyone watching sugar without skipping dessert.

What you’ll need

A few simple ingredients for a big, delicious idea.

Diet soda
Diet soda
Liquid allulose
Liquid allulose
Lemon juice
Lemon juice

Sugar Free Diet Soda Slush

Ninja SlushiPrep 5 min20 to 50 min

Ingredients

Instructions

  1. Pick your batch and mix

    For 2 to 3 servings, use 2 cans (3 cups) diet soda, 3 tablespoons liquid allulose, and 2 tablespoons lemon juice. For 4 to 6 servings, use the amounts in the ingredient list. For 6 to 8 servings, use 5 cans (7½ cups) diet soda, ½ cup liquid allulose, and ⅓ cup lemon juice. Pour the soda slowly into a pitcher or a large bowl, since it foams as it pours, then stir in the allulose and lemon juice until combined.

  2. Pour it in

    Pour the mixture into the vessel, keeping the liquid at or below the max fill line.

  3. Run Slush at 2 bars

    Select SLUSH and set the temperature control so 2 bars are lit. The preset starts at the temperature judged best for the texture. Depending on the batch size and how cold the soda started, plan on 20 to 50 minutes.

  4. Serve it right away

    When the drink reaches its best texture the machine beeps. Serve immediately, while the crystals are fine and the slush pours smooth.

Nutrition guide

The nutrition scoop

Per serving · middle batch, serves 4 to 6

  • Fat 0%
  • Carbs 99%
  • Protein 1%

Feather light: big flavor for barely any calories.

Total fat 0 g
Carbohydrates 19 g
Protein 0 g
of which sugars 0 g
Saturated fat 0 g 0% daily value
Cholesterol 0 mg 0% daily value
Sodium 40 mg 2% daily value
Dietary fiber 0 g 0% daily value
Calcium 15 mg 1% daily value
Vitamin C 5 mg 5% daily value

Where the calories live

The liquid allulose brings the biggest share of the calories here, about 89 percent of the batch, with the lemon juice next in line.

The low sugar secret

Liquid allulose does the sweetening work of sugar with a fraction of the calories, which helps this one freeze soft while staying light.

Want a lighter pour

Pour a smaller glass and top it with sparkling water. The flavor stretches and the landing gets gentler.

Estimated from the ingredients exactly as written, using standard reference values for each ingredient. Your brands and swaps will shift the numbers a little. Daily values are based on a 2,000 calorie diet.

Make it your own

  • Start with the base recipe, then swap one ingredient at a time.
  • Try a different topping after processing.
  • Keep notes so you can revisit your favorite combination.

Texture tips

  • A level, fully solid freeze gives the smoothest spin.
  • Freeze CREAMi bases level and completely solid.
  • For SLUSHi, check compatible liquids and minimum sugar requirements.

Frequently asked questions

What are the three batch sizes?

For 2 to 3 servings: 2 (12 ounce) cans (3 cups or 710 ml) diet soda, 3 tablespoons (45 ml) liquid allulose, and 2 tablespoons (30 ml) lemon juice. For 4 to 6 servings: 4 cans (6 cups or 1.4 L) soda, ¼ cup + 2 tablespoons (90 ml) allulose, and ¼ cup (60 ml) lemon juice. For 6 to 8 servings: 5 cans (7½ cups or 1.8 L) soda, ½ cup (120 ml) allulose, and ⅓ cup (80 ml) lemon juice.

Why liquid allulose, and can I use the granular kind?

Liquid allulose does the quiet work in this recipe. It keeps a sugar free slush soft and scoopable instead of icy, and it stirs straight into cold soda. Granular allulose is not a swap here: it tends to crystallize in a cold, no cook mixture like this one, so reach for the liquid bottle.

Which diet soda works best?

Any diet soda you like drinking works, from cola to lemon lime to root beer, and caffeine free bottles work too. Strongly flavored sodas hold up best once frozen, since cold dulls flavor a little.

Can I add extra flavor?

Yes. Up to 1 tablespoon of a sugar free liquid water enhancer per batch stirs in well and is an easy way to push the flavor further without changing the texture.

What if the low sugar alert shows?

The machine is reading the mix as too low in sugar equivalents to freeze properly. Stir in a little more liquid allulose, or up to 1 tablespoon of granulated sugar for the batch, and let the cycle keep running.