Step 1.
- Chill a coupe glass in the freezer or fill it with ice water to cool.
Step 2.
- In a mixing glass, combine the whiskey, sweet vermouth, and elderflower liqueur.
Step 3.
- Fill the mixing glass with ice and stir gently for about 30 seconds until well chilled.
Step 4.
- Strain the mixture into the chilled coupe glass.
Step 5.
- Express the oils from a lemon twist over the drink and drop it in as a garnish.