Add leaves from four mint sprigs and lavender simple syrup to a silver julep cup. Muddle gently to release the mint oils and combine the flavors.
Pour in bourbon then fill the cup with ice.
Stir until the cup is frosted (about 30 seconds).
Pack cup with more ice to form a dome then garnish with more mint and lavender.
Serve immediately and enjoy responsibly!
Notes
If you don't have these bar tools, don't worry! I shot glass is a great replacement for a jigger. You can use the blunt end of a kitchen spoon in place of a muddler, and a butter knife (plus a gentle hand) works almost as well as a bar spoon.