01 - Rinse fresh peppermint leaves thoroughly and pat dry.
02 - Combine sugar and water in a small saucepan. Heat over medium, stirring until sugar dissolves and mixture reaches a gentle boil.
03 - Remove saucepan from heat. Add peppermint leaves to hot syrup, pressing down to submerge fully.
04 - Cover and allow to steep for 15 minutes to develop flavor.
05 - Strain mixture through a fine-mesh sieve into a clean jar or bottle, discarding peppermint leaves.
06 - Let syrup cool to room temperature, then seal and refrigerate. Consume within two weeks.