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Hungry Healthy Happy » Recipes » Drinks

Watermelon Slushie (Just 4 Ingredients)

Published: May 31, 2025 · Written by Dannii Martin · This post may contain affiliate links which earn us commissions if purchases are made · Leave a Comment

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Diet: Gluten Free / Low Fat / Vegan
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Watermelon slushie with a text overlay title.
Watermelon slushie with a text overlay title.

This super easy 4 ingredient Watermelon Slushie is the only way to stay cool and hydrate this summer - and it is made with all natural ingredients. You don't even need to measure anything - just throw it in and blend.

A glass of slushie garnished with watermelon, lime and mint leaves.

Watermelon is eaten on repeat in our house all summer long and thankfully the kids love it because it is SO hydrating and refreshing!

Once they are bored of Watermelon Fruit Pizza, I make a big batch of this watermelon slushie recipe. It always goes down VERY well at parties too.

This cool drink is made with just frozen watermelon cubes, maple syrup, mint and some lime juice. So simple, and you don't really need a recipe as it works with any quantities so just change it up to suit your own tastes.

Jump to:
  • Watermelon Slushie Ingredients
  • Variations
  • How To Make a Watermelon Slushie - Step by Step
  • Extra Tips
  • Frequently Asked Questions
  • More Watermelon Recipes
  • Recipe
  • Feedback

Watermelon Slushie Ingredients

All the ingredients needed for this recipe with text overlay labels.

A full ingredients list, along with US Customary and Metric measurements, can be found in the recipe card at the end of this post.

  • Watermelon - You need frozen watermelon cubes for this, so you will need to prep that a few hours before making this. This means there is no need to add ice.
  • Maple syrup - This is to make it extra sweet, and can be swapped for honey or agave.
  • Lime - Adds zesty flavor, but can be swapped for lemon.
  • Mint - The perfect combo with watermelon and makes it even more refreshing. Swap for basil for something different.

Variations

Boozy - If you want to make a grown-up version of this frozen watermelon drink, then why not add a splash of tequila or rum to it.

Fizzy - For a fun fizzy version of this, add some sparkling water to the mix before serving. You don't want too much though, otherwise it will dilute the watermelon flavor.

Fruit - You can use any frozen fruit in this recipe. Frozen strawberries or frozen mango also make great slushies.

How To Make a Watermelon Slushie - Step by Step

Watermelon cubes, mint leaves and maple syrup in a blender jug.
  1. Step 1: Put all of the ingredients into the blender.
Everything blended together in the blender jug.
  1. Step 2: Blend until smooth.
  1. Step 3: Pour into 4 glasses and then add the lime and mint for garnish. You can add some watermelon slices on the glasses too.

Extra Tips

  • Make sure you are using a ripe watermelon for the best flavor.
  • Let the watermelon cubes sit at room temperature for about 5 minutes before adding them to the blender, as it will make it easier to blend.
  • Any leftovers can be poured into popscile moulds and frozen for a healthy sweet treat for kids.
  • In the interest of being honest, we did a mint free version that my kids much preferred, so that might be worth a try first.
Blended watermelon in a glass with a sprig of mint leaves in it.

Frequently Asked Questions

How to store leftovers

This is best drunk straight away. However, you can store any leftovers in the freezer in ziploc freezer bags and then blend again when you are ready to serve.

Why is my slushy so thick?

Depending on how watery your watermelon was, you may need to add a little water to it to get it blending easier.

More Watermelon Recipes

  • A glass full of strawberry watermelon smoothie next to a blue towel.
    Strawberry Watermelon Smoothie
  • Two slices of chocolate dipped watermelon on a wooden board.
    Chocolate Dipped Watermelon
  • A Christmas Fruit Tray on a wooden surface next to a red towel.
    Christmas Fruit Tray
  • Watermelon fruit pizza topped with fruit and a drizzle of chocolate.
    Watermelon Fruit Pizza

If you’ve tried this watermelon slushie recipe, let us know how you got on in the comments below.
Tag us in your creations on Instagram @hungryhealthyhappy - Use the hashtag #hungryhealthyhappy too.

Recipe

A glass of watermelon slushie with slices of watermelon and lime on the rim.

Watermelon Slushie (Just 4 Ingredients)

By: Dannii Martin
Cool down with this refreshing 4-ingredient watermelon slushie - quick, easy, and naturally sweet, it's the perfect summer drink for all ages!
A circular logo saying GF.
Gluten Free
the words low fat in a white circle.
Low Fat
An illustration of a v-shaped plant in a pot.
Vegan
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Course: Drinks
Cuisine: British
Prep: 2 minutes mins
Total: 2 minutes mins
Servings: 2 servings
Calories: 133kcal
Allergens:
No Common Allergens

Ingredients

  • 500 g (4 cups) Watermelon - cut into cubes and frozen
  • 2 tablespoon Maple syrup
  • 1 tablespoon Lime juice
  • 5 g (0.25 cups) Fresh mint

Instructions

  • Put all of the ingredients into the blender.
  • Blend until smooth.
  • Pour into glasses and then add the lime and mint for garnish. You can add some watermelon slices on the glasses too.

Recipe Tips

  • Make sure you are using a ripe watermelon for the best flavor.
  • Let the watermelon cubes sit at room temperature for about 5 minutes before adding them to the blender, as it will make it easier to blend.
  • Any leftovers can be poured in to popscile moulds and frozen for a healthy sweet treat for kids.
  • In the interest of being honest, we did a mint free version that my kids much preferred, so that might be worth a try first.

Nutritional Information

Serving: 1portion | Calories: 133kcal | Carbohydrates: 34g | Protein: 2g | Fat: 0.4g | Saturated Fat: 0.04g | Polyunsaturated Fat: 0.1g | Monounsaturated Fat: 0.1g | Sodium: 5mg | Potassium: 349mg | Fiber: 1g | Sugar: 28g | Vitamin A: 1533IU | Vitamin C: 23mg | Calcium: 47mg | Iron: 1mg

The nutritional information provided is approximate and is calculated using online tools. Information can vary depending on various factors, but we have endeavoured to be as accurate as possible.

As all appliances vary, cooking times are a guide. Please note that by changing the serving size, the cooking time may also need to be altered.

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My name is Dannii. Here you will find easy family recipes with a healthy twist.

Established in 2011, Hungry Healthy Happy has become one of the UK's most popular food blogs, with two successful recipe books published.

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