Clean, cut stems off, and hull strawberries. Place in blender with powdered sugar and fresh mint leaves. Then blend for 30 seconds until completely pureed. You should have about 2 cups of strawberry mint puree.
Pour the 4 cups club soda into the blender and blend for 10 seconds until well mixed. Place ice cubes in cups, divide evenly among the cups and garnish with fresh strawberry and mint sprigs. Enjoy immediately.