A cocktail invented in Great Britain in 1937 by Colin Symons. Cointreau balances the dryness of the vermouth.
For 1 cocktail
Combine all ingredients in a chilled mixing glass
Add ice and stir until well-chilled
Strain into a chilled coupe or cocktail glass
Garnish with a lemon twist.
Put the quantity of ingredients you have, to know how much other ingredients you need and how many cocktails you can make.