A simple summer drink that tastes like sunshine in a glass

There are some recipes that just feel like summer the moment you make them, and this watermelon slushie is one of those sweet little joys. It’s the kind of thing you whip up on a warm afternoon when the sun is shining, the kitchen windows are open, and everyone could use something cold and refreshing.

What I love most about this recipe is how simple it is. Frozen watermelon does most of the work here—it turns wonderfully icy and naturally sweet when blended, so you don’t even need much added sweetener. A little splash of lime brightens everything up, and the fresh mint gives it that cool, refreshing finish that makes you want to sip slowly and savor every drop.

Whether you’re serving it to friends on the patio, cooling down after a hot day, or just craving something fruity and fun, this slushie is a lovely little treat to keep in your back pocket.

Why You’ll Love This Recipe

• Only a handful of ingredients
• Naturally sweet and refreshing
• Perfect for hot weather
• Vegan and gluten-free
• Ready in about 15 minutes

Ingredients

Makes about 4 servings

• 10 cups seedless watermelon cubes, frozen for at least 24 hours
• 2–4 tablespoons maple syrup (adjust to taste)
• Juice of 1 large lime
• ¼ cup fresh mint leaves or basil (loosely packed, optional but wonderful)
• 1½ cups filtered water

Ingredient Notes (Helpful Little Kitchen Tips)

Frozen Watermelon
Freezing the watermelon is what creates that thick slushie texture. If you have a big watermelon, cube it and freeze it in bags for quick drinks all summer long.

Maple Syrup
Start with a little and add more if needed. Some watermelons are naturally very sweet, so you may not need much at all.

Lime Juice
This is the magic touch. That little bit of acidity wakes up the sweetness of the watermelon.

Mint or Basil
Mint makes the drink extra refreshing, while basil gives it a slightly fancy, herb-garden twist.

How to Make Watermelon Slushies

1. Let the watermelon soften slightly

Take the frozen watermelon cubes out of the freezer and let them sit at room temperature for about 5–10 minutes. This helps your blender handle them more easily.

2. Add everything to the blender

Place the watermelon, 2 tablespoons maple syrup, lime juice, mint (or basil), and water into a high-speed blender.

3. Pulse first

Start with a few pulses so the watermelon breaks up into smaller pieces.

4. Blend until slushy

Blend until the mixture becomes smooth and icy with a thick slushie texture.

5. Taste and adjust

Taste the slushie and add more maple syrup if you’d like it sweeter. If it’s thicker than you prefer, add a splash more water.

6. Serve right away

Pour into glasses and enjoy immediately while it’s nice and frosty.

My Favorite Tips for the Best Slushies

Use very ripe watermelon.
Sweet watermelon makes the biggest difference.

Freeze in a single layer.
Spread cubes on a tray before bagging so they don’t freeze into one giant block.

Blend in batches if needed.
If your blender is small, divide the recipe.

Serve immediately.
Slushies are best fresh, before they melt.

Fun Variations

Sparkling Watermelon Slushie

Replace the regular water with sparkling water for a fizzy twist.

Berry Watermelon Slushie

Add a handful of frozen strawberries or raspberries.

Coconut Water Version

Swap the water for coconut water for a tropical vibe.

Adult Version

Add a splash of tequila or rum for a frozen summer cocktail.

How to Make It Vegan

Good news — it already is!
This recipe naturally uses plant-based ingredients like maple syrup and fruit, so it’s completely vegan as written.

Serving Ideas

These are lovely served:

• At summer picnics
• With brunch
• After a barbecue
• Poolside on hot days
• As a light dessert

You can even garnish each glass with:

• lime slices
• fresh mint sprigs
• watermelon wedges

Storage Tips

Slushies are best fresh, but you can save leftovers.

Refrigerator:
Store for up to 1 day. Stir or blend again before serving.

Freezer:
Freeze in a container for up to 1 month. Let thaw slightly and blend again to restore the slushie texture.

Quick trick:
Freeze leftovers in popsicle molds for watermelon ice pops.

Frequently Asked Questions

Can I make this without freezing the watermelon?

You can, but the texture will be more like juice or a smoothie. Frozen fruit creates the icy slush texture.

Can I skip the maple syrup?

Yes! If your watermelon is very sweet, you may not need any added sweetener.

What if my slushie is too thick?

Just add a little extra water and blend again.

What if it’s too thin?

Add a handful of frozen watermelon cubes and blend.

Can I use bottled lime juice?

Fresh lime juice tastes brighter, but bottled will work in a pinch.

Do I need a high-speed blender?

It helps, but a food processor also works well for frozen fruit.