Watermelon Juice - InstaCuppa Portable Blender Recipe

Watermelon Juice Recipe: No Sugar, 180 kcal, 30-Second Blend

By Saran Reddy, Founder — InstaCuppa | May 2, 2026 | 7 min read | Last updated: May 2, 2026

Why Watermelon Juice Is the Ultimate Summer Cooler

Watermelon juice recipe uses 450g seedless watermelon, 15ml lime juice, and 5g fresh mint leaves. One 500ml serving has only 180 calories, 0.9g fat, and 3.6g protein. No added sugar needed.

Watermelon is 92% water. That makes it the most hydrating fruit you can blend into juice. In a 45-degree Indian summer, nothing cools you down faster.

Street vendors across Delhi, Mumbai, and Lucknow sell fresh tarbooz ka ras for Rs 50-80 a glass. They cut the melon, squeeze it, and add a pinch of kala namak. Simple and effective.

You can do the same thing at home for Rs 20-30. A portable blender turns watermelon cubes into smooth juice in 30 seconds. No juicer, no strainer, no mess.

The best part? You do not need sugar. Ripe watermelon is naturally sweet. A squeeze of lime and a few mint leaves is all you need for flavour.

Nutrition Facts — Watermelon Juice (1 Serving, ~500ml)

Recipe data table
Calories 180 kcal
Protein 3.6g
Carbs 45g
Fat 0.9g
Fibre 1.8g
Sugar 37g

Source: USDA FoodData Central (watermelon raw 30 kcal/100g). Lime and mint contribute negligible calories.

Ingredients (1 Serving, ~500ml)

Watermelon juice ingredients: 450g seedless watermelon flesh (cubed), 15ml fresh lime juice (1 small lime), and 5g fresh mint leaves (4-5 leaves). No sugar needed.
  • 450g seedless watermelon — cubed, about 4 cups
  • 15ml fresh lime juice — 1 small lime, for tang
  • 5g fresh mint leaves — 4-5 leaves, for aroma

Total cost: Rs 20-30 per serving (vs Rs 50-80 from a street vendor, Rs 150-250 at a cafe).

Step-by-Step Recipe

  1. Cube the watermelon. Cut 450g of seedless watermelon into 2-3cm cubes. Remove any seeds if using a seeded variety.
  2. Add everything to the bottle. Drop the watermelon cubes, lime juice, and mint leaves into the blender bottle.
  3. Blend for 30-45 seconds. Press and hold until the juice is smooth. Watermelon blends fast because of its high water content.
  4. Optional: strain. If you want perfectly smooth juice, pour through a fine mesh strainer. Most people skip this step.
  5. Serve immediately. Watermelon juice separates quickly. Drink it within 15 minutes for the best taste and colour.

Pro tip: Add a pinch of kala namak (black salt) for that authentic Indian street vendor flavour. It brings out the sweetness of the watermelon.

Best Portable Blenders for This Recipe

All three InstaCuppa portable blenders work for this recipe. Here is how they compare:

Model Capacity Price Best For
Model Capacity Price Best For
BBV2 500ml Rs 2,799 Ice crushing, thick blends
BBV3 600ml Rs 3,199 Large servings, 6000 mAh battery
BBV5 450ml Rs 2,999 Travel, compact 230W motor

Did You Know?

Watermelon juice is rich in L-citrulline, an amino acid that lowers blood pressure. In one study, drinking 500ml of watermelon juice daily for 6 weeks reduced systolic blood pressure by 15.1 mmHg in adults with pre-hypertension.

Source: American Journal of Hypertension, 2014 — Clinical trial on prehypertensive adults.

3 Variations to Try

1. Cucumber Detox Water (~120 kcal)

Add 150g cubed cucumber to the base recipe. The cucumber dilutes the sugar and adds a refreshing, spa-like flavour. Great for detox days.

2. High-Protein Version (~280 kcal)

Blend 30g watermelon seeds (fine) with the base recipe and add 20g whey protein powder. Watermelon seeds are rich in protein and iron — most people throw them away.

3. Kids Frozen Slushie (~190 kcal)

Add 100g ice cubes and blend to a slush consistency. Same calories as regular juice but in a fun frozen format. Serve with a thick straw.

3 Common Mistakes to Avoid

  1. Overfilling beyond 400g watermelon. Watermelon expands during blending. If you pack in too much, the juice leaks out the top. Stick to 450g maximum in a 500ml bottle.
  2. Not removing seeds. If you are using a seeded variety, pick out the black seeds first. They dull the blades over time and create a gritty texture.
  3. Blending for too long. Watermelon is soft and blends in 30 seconds. Running the motor for more than 60 seconds risks overheating, especially in summer heat.
InstaCuppa Portable Blender

InstaCuppa Portable Blender

Blend smoothies, shakes & juices anywhere. USB rechargeable, 6 blades, 400ml capacity.

Rs 2,499

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Frequently Asked Questions

Is watermelon juice good for weight loss?

Yes. At only 180 calories per 500ml with almost no fat, watermelon juice is one of the lowest-calorie fruit juices you can drink. It is also 92% water, which helps you feel full.

Can I drink watermelon juice every day?

Yes, in moderation. One glass (500ml) per day is safe for most people. It provides hydration, vitamins A and C, and lycopene. Avoid drinking more than 2 glasses as the natural sugar adds up.

Does watermelon juice need sugar?

No. Ripe watermelon is naturally sweet with 37g of natural sugar per 500ml serving. A squeeze of lime juice is enough to balance the flavour.

Can I store watermelon juice overnight?

Not recommended. Watermelon juice separates and loses flavour within 2-3 hours. It tastes best when freshly made. If you must store it, refrigerate and shake well before drinking.

Is watermelon juice good for skin?

Watermelon contains lycopene, vitamin C, and water — all of which support skin health. Lycopene protects against UV damage, while vitamin C supports collagen production.

Ready to Blend?

Make this recipe in 30 seconds with an InstaCuppa portable blender. USB rechargeable, fits in your bag, and crushes ice.

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