This New Orleans classic was invented in the 1880s by Henry C. Ramos. Original instructions dictated that it be shaken for a good 12 minutes, requiring a bit of a bartender relay. The drink lives on today in bars around the world—minus the marathon shaking time.

1 1/2 oz. gin
1 Tbsp. simple syrup (1:1)
1/2 oz. fresh lemon juice
1/2 oz. fresh lime juice
1 fresh egg white (pasteurized if you like)
1 oz. heavy cream
3 drops orange flower water
1 oz. club soda, chilled
Tools: shaker, strainer
Glass: highball

Combine first seven ingredients in a shaker without ice and shake vigorously to combine. Add ice to the shaker and shake again for at least a couple of minutes (more if you have it in you). Strain into a glass, top with club soda and stir.