Serves / XO Cocktails / D’USSÉ XO Billionaire’s Sidecar A step above the rest, the D'USSÉ XO billionaire's Sidecar is luxury served up. Serves / XO Cocktails / D’USSÉ XO Billionaire’s Sidecar A step above the rest, the D'USSÉ XO billionaire's Sidecar is luxury served up. Ingredients 2 Parts D'USSÉ XO Cognac 1 1/2 Parts Gran Marnier Cent Cinquantenaire 3/4 Part Fresh Lemon Juice Glass & Garnish Coupe & Lemon Peel Method Add all ingredients into a shaker with ice. Shake and strain into a chilled coupe glass.