Boothby Cocktail twisted for the royal wedding of Prince William, Duke of Cambridge, and Catherine Middleton in 2011
50 ml (2 oz) Bourbon Whiskey
20 ml (3/4 oz) Sweet Vermouth
20 ml Brut (3/4 oz) Champagne
2 dashes The Bitter Truth Aromatic Bitters
Stir with ice and strain into a chilled martini glass.