8 blueberries (fresh or frozen and thawed), plus more for garnish
2 tablespoons (1 ounce) freshly squeezed lime juice
2 teaspoons sugar
8 fresh mint leaves, plus more for garnish
1/4 cup (2 ounces) white rum
1 cup ice
2 tablespoons (1 ounce) club soda
lime slice for garnish
Add blueberries, lime juice, sugar and eight mint leaves to a cocktail shaker. Use the end of a wooden spoon or cocktail muddler to bash (or muddle) the mint into the lime juice and sugar. This releases oils from the mint, breaks up the blueberries and helps the sugar dissolve into the lime juice.
Add rum, stir well then pour into a glass filled with ice, leaving about an inch of room then top with club soda. Garnish with extra blueberries, mint leaves and a lime slice.