Cooperstown
Orange zest twist (discarded) & mint sprig
STIR all ingredients (including mint) with ice and fine strain into chilled glass.
[['8 fresh', 'Mint leaves'], ['7.5 cl', 'Rutte Dry Gin'], ['0.75 cl', 'Martini Extra Dry vermouth'], ['0.75 cl', 'Martini Rosso sweet vermouth']]
[['8 fresh', 'mint leaves'], ['7.5 cl', 'gin'], ['0.75 cl', 'dry vermouth'], ['0.75 cl', 'red vermouth']]