When the summer heat kicks in, nothing hits quite like a cold, fruity drink. This homemade watermelon slushie might be the easiest way to cool down. You only need 4 ingredients and 5 minutes to make a delicious, fresh, kid approved, and adult approved frozen drink.
Watermelon is over ninety percent water, so it is naturally hydrating. It also gives you vitamin C, antioxidants, and lycopene, which supports skin and heart health. As a dietitian, I love that this slushie uses simple ingredients and fresh, ripe watermelon, so it feels like a sweet treat while still fitting into a balanced way of eating! Since the watermelon is frozen before blending, you get a thick, frosty texture without adding a lot of ice that waters down the flavor.
This frozen watermelon slushie is quick enough for a weekday pick-me-up, light enough for brunch, and easy to scale up for parties or backyard cookouts. You can even make it a grown-up drink with a splash of your favorite liquor.
If you like fruity frozen drinks, try my frozen sangria or apple cider slushie for more warm-weather sipping.
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Why You'll Love This Recipe
- Quick and simple slushies: Ready in just 5 minutes with fresh watermelon, lime juice, and a touch of natural sweetener.
- Kid and adult approved: A fun drink for little ones and easy to turn into a grown-up version.
- Perfect for summer: Light, fresh, and ideal for hot days, brunches, or backyard gatherings.
Watermelon Slushie Ingredients
You only need a few fresh ingredients for this refreshing watermelon slushie.
- Frozen watermelon cubes: This is the key to a thick, icy drink without a lot of ice. Choose a melon that feels heavy for its size, has a uniform shape, and has a creamy yellow spot where it sat on the ground as a sign it is ripe and sweet.
- Fresh lime juice: Brightens the flavor and balances the sweetness.
- Agave nectar or honey: Optional, but a little can enhance the natural flavor if your watermelon is not quite as sweet.
- Watermelon juice or cold water: Watermelon juice adds an extra boost of flavor and sweetness while helping the slushie blend smoothly. If you do not have juice, cold water works just as well.
See the recipe card below for the full list of ingredients and measurements.
Looking for more watermelon recipes? Check out my virgin watermelon mojito and strawberry watermelon margarita.
Substitutions & Variations
This recipe is easy to customize so you can switch up the flavors for any occasion.
- Swap the citrus to lemon juice instead of lime if that is what you have on hand.
- Change the sweetener by using maple syrup in place of agave or honey for a richer, deeper flavor.
- Add freshness to your watermelon slushy with a handful of basil or mint leaves for a Southern herb garden twist.
- Make it boozy by blending in a splash of tequila, vodka, or rum for a frozen cocktail version.
- Go tropical by mixing in frozen strawberries or pineapple for a bright, fruity boost.
How to Make a Homemade Watermelon Slushie
Follow these simple steps to blend up a fresh, icy watermelon slushie in minutes.
Step 1: If your watermelon is not already frozen, cut it into cubes and freeze on a parchment-lined baking sheet for at least 2 hours or until solid.
Step 2: Add frozen watermelon, watermelon juice (or water), lime juice, and sweetener (if using) to a high-speed blender.
Step 3: Blend until smooth. Taste, then add more lime juice or sweetener if needed.
Step 4: Pour into glasses, garnish with lime wedges or mint, and serve immediately.
Tips for the Best Slushie
Here are my favorite tips for making the best watermelon slushie mocktail.
- Spread watermelon cubes in a single layer on a baking sheet before freezing so they freeze evenly and do not stick together, making blending much easier.
- Use a high speed blender for the frozen fruit to break it down quickly and create the smoothest, fluffiest slushie texture.
- Taste your watermelon before adding sweetener and skip it if the fruit is naturally very sweet.
- Chill your serving glasses in the freezer for 10 minutes before pouring to help the slushie stay cold and refreshing.
- For parties, blend the slushie right before serving so it stays thick, frosty, and at its best for guests.
Storage
Here's how to store your watermelon slushies so they stay fresh and keep that perfect icy texture.
- This drink is best enjoyed fresh for the best texture, but you can freeze leftovers in a sealed container for up to 1 month.
- To serve again, let the slushie thaw for 10 to 15 minutes at room temperature before re-blending until smooth.
- Keep extra watermelon cubes pre-frozen in the freezer so you can make a slushie anytime in just minutes.
Ready to blend up the most refreshing drink of summer?
Scroll down to the recipe card to make this quick and delicious watermelon slush. If you try it, I'd love to see- tag me @healthdownsouth with your slushie variation!
FAQ
Yes. You can blend fresh watermelon, but the texture will be more like juice than a slushie. To get it closer to the icy texture, add ice cubes, keeping in mind they will dilute the flavor a bit as they melt.
Fresh lime juice will give you the brightest, most refreshing flavor, but bottled lime juice works if that is what you have. If using bottled, taste the slushie before serving and adjust the sweetness if needed since the flavor can be slightly more tart or bitter.
Absolutely! You can swap in cantaloupe or honeydew for part or all of the watermelon. Just make sure the melon is ripe and sweet, and freeze the cubes the same way you would for watermelon to keep the slushie texture.
Start with less water in the blender and add more only if needed. You can also toss in extra frozen watermelon cubes or even a few ice cubes to help thicken it without changing the flavor too much.
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Thank you!
Jessie
Homemade Watermelon Slushie Recipe
Ingredients
- 8 cups frozen watermelon cubes
- 1 ½ cup watermelon juice or water
- Juice of 1 lime
- 1 to 2 tablespoons agave nectar or honey optional
- Lime wedges or mint leaves for garnish
Instructions
- If your watermelon is not already frozen, cut it into cubes and freeze on a parchment-lined baking sheet for at least 2 hours or until solid.
- Add frozen watermelon, watermelon juice (or water), lime juice, and sweetener (if using) to a high-speed blender.
- Blend until smooth. Taste, then add more lime juice or sweetener if needed.
- Pour into glasses, garnish with lime wedges or mint, and serve immediately.
Notes
- For the best texture, freeze watermelon cubes for at least 2 hours before blending, or prep them the night before.
- For a grown-up version, add a splash of your favorite liquor such as tequila, vodka, or rum.
- Enjoy fresh for the best texture, but you can freeze leftovers in a sealed container for up to 1 month. Let thaw for 10 to 15 minutes at room temperature, then re-blend until smooth before serving.
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