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A stainless steel baking pan of pink watermelon granita garnished with mint with an ice cream scoop next to it.
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4 from 1 vote

Boozy Watermelon Granita

Boozy Watermelon Granita is super refreshing and tastes so delicious! A perfect semi-frozen treat for hot summer days
Prep Time15 mins
Total Time15 mins
Course: Dessert, Drinks
Servings: 8
Calories: 101kcal


  • 1/2 whole watermelon cut into chunks (preferably seedless)
  • 2 limes juiced
  • 1/2 cup simple syrup see note
  • 1/2 cup white rum
  • 15-20 leaves mint chopped


  • Lightly blend the watermelon chunks in a food processor or blender, then push through a fine sieve to get rid of the seeds. Use a spoon to press out more of the juice.
  • Add the juice of two limes, the white rum, and the finely chopped mint leaves.
  • Taste the mixture to see how sweet it already is and add 1/4 cup to 1/2 cup of simple syrup.
  • Pour into a metal baking dish or pan and freeze for 3 hours. Then use a fork to break the mixture up until it is quite slushy. Return to the freezer and repeat this process after 2 hours.
  • Repeat until the mixture is completely frozen and shaved.
  • Serve in chilled glasses. If you like you can add more rum to the granita when serving.


  • If you don't have simple syrup just make your own. Heat up 1 cup water and 1 cup sugar together until the sugar is completely dissolved. Store in an airtight container in the fridge.
    Don't add more rum to the unfrozen granita mixture. Alcohol doesn't freeze well.
  • This Watermelon Mojito Granita keeps tasty in the freezer for up to 2 weeks. Just break up the mixture with a fork when you want to serve it.


Calories: 101kcal