Step 1.
- Chill a coupe glass by filling it with ice water and setting it aside.
Step 2.
- In a mixing glass, combine 1.5 oz of Scotch whisky, 1 oz of sweet vermouth, and 0.5 oz of green Chartreuse.
Step 3.
- Fill the mixing glass with ice and stir well until chilled and diluted.
Step 4.
- Empty the ice water from the chilled coupe glass.
Step 5.
- Strain the mixed cocktail into the coupe glass.
Step 6.
- Garnish with a twist of lemon peel, expressing the oils over the drink before dropping it in.