House of (Angostura) Blues
1 oz Blueberry Rosemary Shrub
1/2 oz Angostura aromatic bitters (yes! a full 1/2 oz)
2-3 oz ginger beer
Pour over ice and stir. Garnish with blueberries. If it is not sweet enough for you add 1/4 oz of simple syrup.
Recipe and photo reprinted with the permission of Charlie Berkinshaw