- Combine the ingredients in a cocktail shaker with a small lump of ice
- Shake to chill
- Strain into a well-chilled cocktail glass
- Garnish with a slice of lemon
- Optionally, for those who prefer it very sweet, add two dashes of simple syrup.
- Vermouth Cocktail from Jerry Thomas' Bartender's Guide or How to Mix Drinks, out of copyright