For Mint Syrup For Mojito

1. Mash mint leaves with a wooden spoon or mortar and pestle. Stir in sugar and water. Bring to a boil over medium heat, stirring constantly. Simmer for 3 minutes. Let cool to room temperature, then strain out mint leaves, pressing with a spoon to extract all liquid.
2. In a bowl, combine blackberries and sugar. Use a spoon to smash blackberries until they're broken down.
3. Distribute blackberries among 4 glasses. To each glass, add 2 tablespoons of simple syrup and 2 tablespoons of lime juice. Fill glasses with ice and top with sparkling water. Garnish with mint.