Muddle the orange wheels, add the rest of the ingredients, shake with ice, and strain into a Collins glass. Fill with crushed ice, add a straw, and garnish with 2 orange half moons and around 1/8 oz juniper-forward gin dripped over the top.
While reading Nicola Nice's The Cocktail Parlor: How Women Brought the Cocktail Home book in the section mentioning the Sherry Cobbler, I was inspired to riff on Ada Coleman's Hanky Panky and transform it into a Vermouth Cobbler. Sweet vermouth and Fernet were a duo that worked in my Diddlin' Dora back, and I decided to make this riff an inverse Hanky Panky of sorts and include classic muddled orange wheels in the mix to smooth out the balance. I dubbed the result the Coley Cobbler after Ada's nickname at the Savoy bar.