This watermelon mint lemonade is super easy to make and is so refreshing on a hot summer day. This is one of those recipes you’ll want to tinker around with to find the right flavor combination for your tastes. For example, the amount of water you need to add will vary depending on how juicy the watermelon is and how strong you want the flavor to be. Directions for a mint-infused simple syrup are included. The watermelon adds a lot of sweetness, however, so you may not wish to sweeten it further. It really depends on how sweet or tart you want the final results to be. If you are serving this recipe outside on a warm day, make extra so you can freeze some into ice cubes or an ice ring (if serving in a punch bowl). Using ice cubes made of the beverage you are serving rather than plain water will prevent watered-down drinks as the day or evening progresses. For an adults-only variation, add some citrus-flavored vodka before serving.