Combine ingredients in a shaker with ice and shake for 20 seconds. Double strain into a chilled martini glass and garnish with a grapefruit or lemon twist. For an added Texas touch, finish with a dash or light rim of Tajín.
Notes
Pro Tips
Use freshly squeezed grapefruit juice whenever possible.
Chill the martini glass before serving.
Shake for a full 20 seconds to achieve proper dilution.
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