Muddle the peas in the bottom of mixing tin, then add the remaining ingredients.
Add ice and hard-shake until well-chilled.
Double-strain into a short-stemmed glass.
Top with flavored ice cubes.
*Small pomegranate/beet/allspice ice cubes: Combine 2 cups pomegranate juice, 1/2 cup red beet juice, 3 oz St. Elizabeth allspice dram and 20 dashes The Bitter Truth Jerry Thomas' bitters in a pitcher. Freeze in ice cube trays.