2 parts ROOT
1/2 part Navan (or vanilla liqueur)
Splash heavy cream
Use lemon juice to rim the edge of a martini glass with granulated sugar. Pour 2 parts ROOT into a metal shaker. Add 1/2 part Navan and a dash of heavy cream. Add ice cubes. Shake vigorously to properly emulsify the cream. Strain into rimmed glass. Serve immediately.
Remember, great cocktails start with responsible measuring!