This variation on the classic sidecar replaces lemon juice with blood orange juice. Feel free to adjust the proportions to taste.
Its Angostura bitters come from a little-known plant in the mixologist's garden: gentian. Without this tall yellow flower that grows wild in French alpine meadows, any number of classic cocktails would not exist. The Manhattan, the Negroni, and the Old-Fashioned all rely on the bitterness of gentian. Angostura bitters, a staple ingredient found in even the most poorly stocked bars, contains gentian and even broadcasts that fact on the label. Many of the most famous European amaros and liqueurs set aside their secrecy and plainly claim gentian as a key ingredient. Campari, Aperol, Suze, Amaro Averna, and the aptly named Gentiane are just a few of the hundreds of spirits that depend on this plant for bitterness.
1 1/2 ounces Cognac or brandy
3/4 ounce blood orange juice
1/2 ounce Solerno Blood Orange Liqueur (or another citrus liqueur like triple sec)
Dash of Angostura bitters
Shake all the ingredients except the bitters over ice and strain into a cocktail glass. Add a dash of bitters on top.