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Watermelon Slushie

Published: Jun 10, 2025 by Sue · This post may contain affiliate links · Leave a Comment

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I’m totally obsessed with this icy, vibrant watermelon slushie—just three main ingredients, a hint of lime, and super‑chilled refreshment that’s pure summer in a glass.

Watermelon Slushie

Why You’ll Love This Recipe

I love that this slushie is:

  1. Effortlessly refreshing & hydrating – It’s mostly pure frozen watermelon with just enough lime and sweetener to make it perfect.
  2. A crowd‑pleaser – Kids smile at the bright color and sweet taste; grown‑ups appreciate how easy it is to whip up a big batch for BBQs or pool days.
  3. Fast to make – Once the watermelon cubes are frozen (about 2 hours), the blender does the work in minutes.
  4. Totally customizable – I adjust the sweetness to match how juicy my watermelon is and swap sweeteners—honey, agave, maple syrup, sugar, it all works.

Ingredients

(Here's a tip: Check out the full list of ingredients and measurements in the recipe card below.)

  • 7 cups seedless watermelon, cubed and frozen
  • ½ cup fresh lime juice
  • ¼ cup sweetener (maple syrup, honey, brown sugar, or granulated sugar)
  • 5–10 tablespoon cold water, as needed for blending
  • Optional garnish: watermelon wedge, fresh mint or basil, lime slices

Directions

Here’s how I make it:

  1. Freeze watermelon – Cube the watermelon small enough for your blender, freeze in a single layer for about 2 hours.
  2. Blend ingredients – In a high‑powered blender, combine frozen watermelon, lime juice, sweetener, and about 3 tablespoon cold water. Blend for 3–5 minutes until smooth.
  3. Adjust consistency – If too thick, I add more water; if too runny, I toss in a few extra watermelon cubes—blend again until perfect.
  4. Serve immediately – I pour into cold glasses and top with a watermelon wedge, mint or basil, and maybe a lime slice.

Servings and timing

  • Servings: 4
  • Prep time: 10 minutes
  • Freezing time: 2 hours
  • Total time: about 2 hours 10 minutes

Storage/reheating

I enjoy it fresh, but I save leftovers by freezing the slushie in an airtight container for up to one week. When I want to enjoy more, I let it thaw briefly, then stir or re-blend to revive the frosty texture.

Variations

I love playing with add‑ins:

  • Herb‑fresh twist: Blend in a few fresh mint or basil leaves at the end.
  • Fruity combo: Add berries or pineapple for flavor variety.
  • Citrus swap: Try lemon or orange juice in place of lime for a different citrusy touch.

FAQs

What sweeteners can I use?

I’ve tried them all—maple syrup, honey, agave, brown sugar, even granulated sugar—and they all work. I pick the sweetener based on my mood or what’s in the kitchen, and I always taste before blending more.

Do I really need a high-powered blender?

A high‑powered blender is ideal for smooth, icy texture, but a food processor can work in batches if that’s what I have.

Can I prepare this in advance?

Yes—freezing the watermelon cubes ahead of time is the best prep. Then I blend everything just minutes before serving.

Can I use other fruits?

Absolutely! I like mixing in strawberries, pineapple, or even mango to give it a fruity twist. I just keep the base mostly frozen watermelon for the right texture.

How should I garnish it?

I usually top mine with a small watermelon wedge and fresh mint or basil. Lime slices also add a nice zing!

Conclusion

This watermelon slushie is one of my go‑to treats for hot days—simple, hydrating, and totally customizable. I enjoy it as-is or mix it up with herbs or other fruits. The texture is best straight from the blender, so I always blend just before serving (or revive it if I’ve kept it frozen). Summer perfection in a glass!

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Watermelon Slushie

Watermelon Slushie

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  • Author: Sue
  • Prep Time: 10 minutes
  • Cook Time: 0 minutes
  • Total Time: 2 hours 10 minutes
  • Yield: 4 servings
  • Category: Drinks
  • Method: Blending
  • Cuisine: American
  • Diet: Vegan
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Description

This vibrant watermelon slushie is a refreshing summer treat made with just frozen watermelon, lime juice, and your favorite sweetener. It's hydrating, quick to make, and completely customizable.


Ingredients

  • 7 cups seedless watermelon, cubed and frozen
  • ½ cup fresh lime juice
  • ¼ cup sweetener (maple syrup, honey, brown sugar, or granulated sugar)
  • 5–10 tablespoon cold water, as needed for blending
  • Optional garnish: watermelon wedge, fresh mint or basil, lime slices

Instructions

  1. Cube the watermelon and freeze in a single layer for about 2 hours.
  2. In a high-powered blender, combine frozen watermelon, lime juice, sweetener, and about 3 tablespoon cold water. Blend for 3–5 minutes until smooth.
  3. If the mixture is too thick, add more water. If too runny, add a few extra frozen watermelon cubes and blend again.
  4. Serve immediately in cold glasses, garnished with a watermelon wedge, mint or basil, and lime slices if desired.

Notes

  • Adjust the sweetener based on the sweetness of your watermelon.
  • Blend in fresh herbs or additional fruits for variations.
  • Leftovers can be frozen and re-blended later.

Nutrition

  • Serving Size: 1 glass
  • Calories: 90
  • Sugar: 18g
  • Sodium: 5mg
  • Fat: 0g
  • Saturated Fat: 0g
  • Unsaturated Fat: 0g
  • Trans Fat: 0g
  • Carbohydrates: 23g
  • Fiber: 1g
  • Protein: 1g
  • Cholesterol: 0mg

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Hey there! I'm Sue, a mom, a wife, and someone who’s always in the kitchen trying out new recipes or revisiting old ones that remind me of family gatherings and special moments.

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