I've been making my own cold brew for a couple years now and love the scent and flavor of blueberries paired with coffee. This cocktail plays with that combination a bit whimsically, with a smashed blueberry honey syrup, Mr. Blacks, a bite of ginger, and a Japanese whiskey base. A lemon peel expressed highlights fragrance.
Bring 1 cup honey and 1 cup water to a boil and lower to a simmer. Add 1/2 lb blueberries and cover over low heat until blueberries begin to swell. Smash blueberries and remove from heat. Store and cool.
Mix 2oz Hibiki Harmony, 1/2 oz Mr. Blacks, 1/2 oz Domaine Canton, 3/4 oz smashed blueberry honey syrup in a shaker and shake vigorously over ice.
Add one egg white to shaker, shake vigorously once more, strain and pour into a coupe glass.
Spray blueberry bitters over the surface, express one lemon peel and add as garnish.
Sit back, sip, smell, enjoy, smile. Whatever will be, will be.