Clementine Bourbon Smash

Peel one clementine. Cut remaining clementine into wedges and/or slices. Muddle peeled clementine and 4 mint leaves in a cocktail shaker. Add bourbon, clementine juice, lime juice, orange liqueur, maple syrup and bitters. Fill with ice; cover and shake until very cold. Fill two highball glasses halfway with ice. Strain mixture into glasses. If desired, top with club soda. Garnish with clementine wedges and additional mint.