- 1 cup water
- ½ cup sugar
- 6 lemons
- 5 cups cubed watermelon
- Additional watermelon wedges or cubes, for serving
- Lemon slices, for serving
- Seltzer or ginger beer, for serving (optional)
- Place the water in a small saucepan and add the sugar. Cook over medium heat, stirring frequently, until the mixture comes to a boil.
- Simmer for a few minutes or until the sugar is completely dissolved. Remove the pan from the heat and allow the simple syrup to cool completely before using.
- Meanwhile, juice the lemons into a large pitcher (I set a small sieve over the pitcher to catch any seeds). Place the watermelon cubes in a blender (you may need to do this in batches) and puree until the watermelon is completely juiced (See NOTE).
- Add the watermelon juice to the pitcher with the lemons. Taste the mixture and add as much of the simple syrup as desired to meet your tastes. I would start with ¼ cup of the syrup and add from there, if needed. It really depends on your preference and the sweetness of the watermelon/tartness of the lemons.
- Chill the mixture thoroughly before serving. I found that this tasted best after chilling in the fridge for several hours.
- To serve, pour into glasses filled with ice and garnish with lemon slices and additional watermelon slices/cubes. I like mine with a splash of ginger beer or seltzer as well for some fizziness!
- I have a high-powered blender and did not feel the need to strain the watermelon juice. This is an optional step you can take.
- Additionally, if you don’t want to make the simple syrup, try sweetening this with a tablespoon or two of honey. Just make sure to taste it before you sweeten it – the watermelon may be sweet enough for your tastes!