2 (1.5 fluid ounce) jiggers gin (such as Aviation® or Hendrick’s®)
2 (1.5 fluid ounce) jiggers orange-flavored liqueur (such as Cointreau®)
2 (1.5 fluid ounce) jiggers elderflower liqueur (such as St. Germain®)
2 (1.5 fluid ounce) jiggers lemon juice
Combine gin, orange-flavored liqueur, elderflower liqueur, and lemon juice with some crushed ice in a cocktail shaker. Cover and shake until the outside of shaker has frosted. Strain into 2 glasses.