Muddle everything together except soda. Taste and adjust if desired. Add soda. Pour over ice and serve immediately.
To truly follow the cocktail etiquette on this drink and get the best flavor combine all ingredients except ice and soda in the shaker and chill for several hours. Then at serving time add ice, muddle again, add soda and serve.
Notes: This makes a quite strong and sweet cocktail. You can scale back the bourbon or maple syrup if you prefer a milder drink or increase the soda volume.