*Fill in a Collins glass with finely cracked ice and place to one side.
*Strip the leaves from two sprigs of fresh mint and place into a mixing glass.
*Sprinkle with one teaspoonful sugar and muddle until mint flavor is released from leaves.
*Add a splash of club soda, muddle again and add 3 oz bourbon whiskey.
*Stir gently and strain into the prepared Collins glass
*With a long handled spoon, work the mixture up and down until the outside of the glass begins to frost.
*Decorate with sprigs of fresh mint.
*Serve with straws.
*Top with a splash of rum, if desired.
(do not touch the glass with warm hands; use a towel while handling in order to facilitate frosting.)