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A chilled frozen watermelon slushie cocktail drink with a lime wedge.

Frozen Watermelon Slushie Cocktail (Alcohol-Free Option)

5 from 1 vote
Cool down with this simple and ultra refreshing frozen watermelon slushie cocktail recipe. Enjoy it with or without alcohol on a hot summer day!
Prep Time:5 mins
Freezing Time:4 hrs
Servings: 2
Author: Lindsey Jenkins


  • 4 cups watermelon cubes
  • 3 tbsp fresh lime juice
  • 2-3 tbsp simple syrup see notes
  • 4 ounces clear alcohol such as tequila, vodka, gin, or white wine or water
  • pinch flaky salt + more for rim (optional)


  • Place the watermelon cubes in a single layer on a lined baking sheet and freeze for about 3-4 hours or until completely frozen.
  • Make the simple syrup around the same time you freeze the watermelon so that it's nice and cold when you're ready to make your slushie.
  • To a blender, add the frozen watermelon cubes, fresh lime juice, alcohol or water of choice, simple syrup, and pinch of salt. Blend until smooth (you may need to stop and scrape down the sides or use a tamper if your blender has one).
  • Serve in a chilled glass with a salted or sugared rim (optional).


The simple syrup helps to intensify the flavor of the watermelon. How much you add will depend on how sweet your fruit is, so adjust accordingly.
Don't drink alcohol? - use water or coconut water in place of the alcohol (I personally love the mocktail version. Plus, it's also kid-friendly.)
No fresh lime juice? - Pure lime juice in a jar also does the trick.
No simple syrup? - maple syrup will work, but I highly recommend the simple syrup for a clean finish.
Variations - try other kinds of melon and get creative with infused simple syrups to create endless variations.