Homemade Watermelon Slushie served in a watermelon rind with fresh limes on top
4.7 from 13 votes

Coconut Lime Watermelon Slushie

Super simple, 3-ingredient watermelon slushie with coconut milk and lime juice. The perfect refreshing, naturally sweetened summer treat!
Author: Minimalist Baker
Prep Time 4 hours
Total Time 4 hours
Servings: 2 (slushies)
Category: Beverage, Dessert
Cuisine: Gluten-Free, Vegan
Freezer Friendly 1 Month (see instructions)
Does it keep? Best when fresh.



  • 1 small seedless watermelon (cubed)


  • 4 cups frozen watermelon (3/4-1 small seedless watermelon yields ~4 cups or 616 g)
  • 1 medium lime (juiced)
  • 1/3 cup light coconut milk
  • 1/2 cup watermelon juice (plus more to ease blending)
  • 1 Tbsp sweetener of choice (optional // such as maple syrup or honey if not vegan)
  • 1 pinch sea salt (optional)


  1. Halve a ripe seedless watermelon and scoop out rounded Tablespoon amounts (or cube with a knife). Arrange on a parchment-lined baking sheet. Freeze until firm - about 3-4 hours.

  2. In the meantime, halve another small seedless watermelon and add the fruit (leaving the rind behind) to a blender. Blend on high, adding a touch of water if needed (I didn't), until completely smooth and pureed.
  3. OPTIONAL: Drape a large, thin dish towel over a mixing bowl and pour over juice. Then gather corners, lift up and squeeze the juice out leaving the pulp behind - there shouldn't be much, but this makes the juice extra smooth. Transfer to a mason jar, cover, and refrigerate - should keep for 3-4 days, or more.
  4. Once watermelon is frozen, add ~ 4 cups (amount as original recipe is written // adjust if altering batch size) frozen watermelon (I found 4 cups was about three-quarters of one small watermelon), coconut milk, lime juice, and watermelon juice to a blender and blend on low until creamy and smooth. You will need to scrape down the sides and blend on low to encourage it along. If it has trouble blending, add a bit more watermelon juice, but not too much or it will become too thin.

  5. Once the slushie is blended and smooth, taste and adjust flavor as needed. Add more coconut milk for creaminess, lime for brightness, a pinch of salt to enhance sweetness, or sweetener of choice to sweeten. Blend and sample again - repeat as needed.

  6. Serve in empty watermelon rinds or chilled serving glasses and garnish with a lime wedge.
  7. This recipe serves 2 generously. Best when fresh! TIP: Freeze leftovers in Popsicle molds.


*Nutrition information is a rough estimate.

Nutrition Per Serving (1 of 2 slushies)