This homemade Watermelon-Mint Soda is super easy to make, and so refreshing - enjoyed all summer long by the pool or for backyard cookouts!
Place one cup of mint in a medium heat-resistent bowl; set aside.
Place the sugar, water, and remaining 1 cup of mint in a medium pot. Bring to a simmer over medium heat, stirring, until the sugar has completely dissolved and the liquid is clear, not cloudy. The mixture should be reduced and a light syrupy consistency.
Pour this mixture over the bowl with the dry mint. Allow to cool completely, then strain.
Make your sodas by placing your simple syrup and pureed watermelon into 8 ounce glasses. Pour in the cold seltzer water and top with some ice. And enjoy!