First, start by juicing your watermelon. Cut your personal (or 1/2 regular) watermelon into 1” chunks, removing and discarding the rind. Place the watermelon in a high-speed blender or food processor, and blend until completely pureed. Strain in a fine-mesh strainer 1-2 times to remove pulp and seeds (to desired smoothness). Refrigerate for up to four days until ready to use.

To make the cocktail, pour the simple syrup, lime juice, and 1-2 mint leaves in an 8-12 ounce cocktail glass, and muddle until the mint is fragrant, about 15 seconds.

Add the gin and 3 ounces of watermelon juice. Give it a stir, and then add ice. Stir until very cold, another 15 seconds or so. Top with the seltzer, and garnish with watermelon slices, lime, and mint. Enjoy!

To make a pitcher cocktail, multiply the ingredients by the number of servings you would like to make. Follow the same directions, muddling and mixing in a pitcher, but leave out the seltzer and ice (otherwise, it will get watery and flat)! Immediately before serving, pour the cocktail in individual cocktail glasses over ice, stir, and top with seltzer and garnishes.