This month, as daytime skies grow dark for the first total solar eclipse in 38 years, you’ll want to find yourself a comfy perch, some protective eyewear and a tasty cocktail. We have you covered on the last one with this playful spin on a Rum Sour, made with activated charcoal and seasonal berries.
In a cocktail shaker, muddle the blackberries in a shaker.
Add the remaining ingredients, and dry-shake (without ice) until the egg white turns foamy, for 20 seconds.
Add ice and shake vigorously until well-chilled.
Double-strain into a chilled coupe glass.
Garnish with 3 dashes of Angostura bitters.