cup high-quality tequila (I prefer Patrn Silver tequila)
cup freshly squeezed lime juice
2 tablespoons triple sec
4 cups ice
In a blender, process half the watermelon, half the tequila, 2 tablespoons of sugar, 2 tablespoons of lime juice, 1 tablespoon of triple sec, and 2 cups of ice until smooth. Transfer to a pitcher.
Repeat with the remaining watermelon, tequila, sugar, lime juice, triple sec, and ice. Add this second batch to the first and refrigerate until ready to serve.