Watermelon Simple Syrup


Use this fruity syrup to make some of your favorite summertime beverages.

watermelon wedges on a wooden cutting board
Photo: Katie Sikora/Southern Living
Active Time:
10 mins
Total Time:
55 mins
2 1/3 cups

Simple syrup is usually just equal parts water and sugar, but this version swaps the water for sweet and flavorful watermelon juice. Once a batch of this syrup is ready, you’re halfway to making a bunch of delicious summer drinks, from Watermelon Frosé to Watermelon-Basil Sweet Tea.

But this simple syrup is good for more than just refreshments; you can also use it as a cake soak to infuse extra flavor into summer cakes.

Have extra simple syrup? Enjoy it all season long. Just pour leftover syrup into an ice cube tray, and place in the freezer until it’s solid. When you’re ready to use it, thaw the cubes completely and stir to recombine, if needed.


  • 5 cups  (1 lb., 10 oz.) watermelon cubes (from 1 [4 1/2 lb.] watermelon)

  • 1 cup granulated sugar


  1. Process watermelon in a blender on medium-high speed until smooth, about 10 seconds. Pour watermelon mixture through a fine mesh strainer into a medium bowl; discard solids. Measure out 2 cups juice; add to a medium saucepan with sugar. Discard or reserve any remaining juice for another use.

  2. Cook watermelon mixture over medium-high, stirring occasionally, until sugar is completely dissolved, about 5 minutes. Pour syrup into a medium-size heatproof bowl, and let cool at room temperature for 45 minutes. Use immediately, or chill, uncovered, until cold, about 2 to 3 hours. Store in an airtight container in refrigerator up to 5 days.

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