Step 1.
- Chill a cocktail glass by placing it in the freezer or filling it with ice water.
Step 2.
- In a cocktail shaker, combine 2 ounces of Armagnac, 3/4 ounce of sweet vermouth, and 1/2 ounce of fresh lemon juice.
Step 3.
- Add ice to the shaker and shake well until chilled.
Step 4.
- Strain the mixture into the prepared cocktail glass.
Step 5.
- Garnish with a lemon twist, expressing the oils over the drink before placing it in the glass.