watermelon slush in a clear glass garnished with lime and watermelon and a rainbow striped paper straw

This drink screams summer. Between the Malibu, watermelon, and lime, you just can’t get more summer than this Boozy Watermelon Slush! I had this drink in mind for a while, and what better way to celebrate Naitonal Watermelon Day? When it came together, it tasted even better than I expected. One thing that surprised me was how delicious frozen watermelon is. Everyone raves about frozen grapes, but when I took a bite of the frozen watermelon, it was like it’s sweetness factor went up a dozen notches. It was amazing!

bottle of malibu rum with sliced watermelon in a white bowl surrounded by limes

INGREDIENTS YOU’LL NEED FOR THE BOOZY WATERMELON SLUSH:

watermelon
limes
sugar
water
Malibu rum

overhead shot of two glasses of slushes surrounded by sliced watermelon and lime

HOW TO MAKE BOOZY WATERMELON SLUSH:

(full recipe card below)

Peel and cut your watermelon into thin, small slices. Lay them on a wax paper lined cookie sheet and freeze.
While the watermelon is freezing, make your lime simple syrup.
In a saucepan, combine the water, sugar, and zest from your limes.
Bring to a boil and allow to simmer until all of the sugar has dissolved.
Remove from the stove and allow it to completely cool. Once cooled completely, place in a container and put in the fridge to chill.
Once your watermelon is frozen, remove from the freezer and add it to the blender. Yes, the entire watermelon.
Pour in your simple syrup, and the juice from your limes.
Blend until a slushy consistency.
If you need it a little more “slushy”, add in a few cubes of ice and blend.
Garnish with additional watermelon and lime.

3 glasses of slushes surrounded by limes and garnished with watermelon, lime slice, and a rainbow straw

TIPS AND NOTES FOR BOOZY WATERMELON SLUSH:

The thinner you slice your watermelon, the faster it will freeze.
If you want a stronger lime flavor, you can squeeze in extra lime after its poured into your glass.
Get creative and rim your glass with lime juice and sugar.
If you want it more of a slushy flavor without adding ice, you can blend the watermelon and freeze in ice cubes. I wouldn’t recommend freezing the syrup.

glass of one watermelon slush garnished with lime and watermelon

CAN THIS BE MADE AHEAD OF TIME?

I wouldn’t recommend it. You can freeze the watermelon in advance, but I’d make these right before serving.

glass of watermelon slush garnished with lime and watermelon with a rainbow paper straw

INTERESTED IN SIMILAR RECIPES? TRY ONE OF THESE:

up close shot of watermelon slush garnished with lime and watermelon

Boozy Watermelon Slush

Author: Kara – Sweetly Splendid
Prep Time: 10 min (does not include freezing time)
Total Time: 10 min (does not include freezing time)
Yield: 6 1x

Scale

Ingredients

1 seedless watermelon
4 large limes
1/2 cup sugar
1/2 cup water
1/2 cup Malibu rum (more or less to your liking)

Instructions

Peel and slice your watermelon into small thin slices. Place on a wax paper lined baking sheet. Place the sheet in the oven to freeze your watermelon. Remember, the thinner the slices, the faster it’ll freeze.
While your watermelon is freezing, make your simple syrup. Add sugar, water, and the zest from 1 lime into a sauce pan.
Heat until boiling, reduce heat and simmer, stirring until all sugar is dissolved. Remove from heat.
Allow the syrup to cool completely and then place in the refrigerator to cool even further.
Once the watermelon is frozen completely and the syrup cooled, add both to a blender along with the Malibu rum and juice from all limes.
Blend until smooth. If you’d like it to be even icier, add in some cubes of ice and blend.
Enjoy with an extra squeeze of lime into your glass if you prefer.

Notes

The thinner you slice the watermelon, the faster it will freeze
The key to a good slush is to make sure all of your ingredients are very cold, with the watermelon being completely frozen.
You can opt to blend your watermelon and then freeze in ice cubes if you prefer.
Do not freeze the syrup, your final result won’t taste the same.