St. Louis Old-Fashioned

A “St. Louis Old-Fashioned” made with 2 1/4oz of Schnucks Supermarkets bourbon, 1/3oz of St. Louis-made ginger liqueur called “Big O”, 1/3oz of St. Louis City water (voted “Best Water in the Nation”), and 3 dashes of Angostura bitters (from Trinidad & Tobago) and garnished with a lemon twist.