Steps
- Bring 2 cups of sugar and 2 cups of water to a boil in a medium saucepan over medium-high heat. Boil for 15 minutes, stirring occasionally.
- Turn off the heat and add ½ cup of distilled white vinegar and 1 cup of loosely packed fresh mint. Cover and let cool completely, at least 1 hour.
- Strain out the mint through a fine-mesh strainer. For each drink, stir 1-2 tablespoons of the syrup into a large glass of ice water.