Step 1

Make Basil Syrup : In a medium saucepan over medium-high heat, bring water and sugar to a boil. Stir to dissolve sugar. Add basil leaves, remove pan from heat, and let steep for 20 minutes.Strain syrup and let cool for at least 1 hour.

Step 2

Make Spritzer : In a large pitcher, combine syrup, unsweetened cranberry juice, and fresh lime juice. Fill pitcher with chilled club soda, then add lime slices, fresh cranberries, and basil leaves. To serve, pour spritzers over ice, top each with a splash more club soda, and garnish with basil.