Vodka Lemonade

Bahan-bahan (4 porsi)

• 1 cup sugar
• 1 cup water
• 1 cup freshly squeezed lemon juice
• 1 large mint sprig, (finely chopped)
• 8 ounces lemon-flavored vodka
• sparkling water
• 1 tablespoon freshly grated lemon zest
• fresh mint sprigs, (for garnish (optional))