The Smashed Pumpkin is an autumn cocktail that was created by Jassy Davis and was first published in her book Winter Warmers: 60 Cosy Cocktails for Autumn & Winter. It's essentially a pumpkin-flavored variation of the classic Whiskey Sour that is made with bourbon, lemon, a homemade pumpkin spice syrup, citrus, and egg.
Add bourbon, lemon juice, pumpkin spice syrup, two dashes orange bitters, and egg white to a shaker.
Shake for 10-20 seconds.
Using tongs, remove ice from shaker.
Dry shake for 5-10 more seconds to emulsify egg.
Using a Hawthorne strainer, strain into a sour glass.
Garnish with three drops of orange bitters.