The Grand Marnier Sour replaces the usual base spirit with the French orange liqueur based on Cognac – making it spicier and more complex than a classic Whiskey Sour. The bitter orange notes of Grand Marnier harmonize perfectly with fresh lemon juice, while egg white provides a silky texture. A drink for those who prefer their Sour with a French accent.
And this is what you need for the Grand Marnier Sour
6 cl Grand Marnier
3 cl fresh lemon juice
1.5 cl simple syrup (1:1)
1.5 cl egg white (approx. ½ egg white)
2 dashes Angostura Bitters
This is what matters
Grand Marnier already brings its own sweetness – about 28 grams of sugar per 100 ml. That’s why you need significantly less simple syrup here than in a classic Sour. Some bartenders even skip the syrup altogether and compensate with a bit more egg white. For your first attempt, use 1.5 cl and adjust to your taste in the next drink. The Cognac in Grand Marnier can handle vigorous shaking – the aromas open up better than with gentle stirring.
Variations
- Grand Marnier Sour with grapefruit — replace 3 cl lemon juice with 2 cl lemon juice and 2 cl fresh grapefruit juice – gives the drink a more tart, complex note
- Cordon Rouge Flip — use whole egg instead of just egg white, increase syrup to 2 cl, and top with freshly grated nutmeg
- Orange Sour Royale — after straining, top with 2 cl Champagne – makes the drink lighter and more festive
Frequently asked questions
Can I use Cointreau instead of Grand Marnier?
Cointreau works, but it’s much lighter and less complex since it lacks the Cognac base. You’ll then need a bit more syrup because Cointreau is drier. The drink will be leaner and less spicy overall.
Can I make the drink without egg white?
Of course, but it will be much thinner. The egg white binds the acid and gives the texture a silky feel. Alternatively, you can use 2 cl aquafaba (chickpea water) – it froths up just as well.
Why isn’t the drink served over ice?
The Coupe glass shows off the foam better and doesn’t dilute the drink further. The Grand Marnier Sour relies on the balance between acidity and sweetness – ice would gradually water it down. If you want to enjoy it longer, use a tumbler with a large ice cube.
How long does the foam last?
With a good dry shake, the foam holds for about 10 to 15 minutes. The key is to shake vigorously and strain twice – ice shards destroy the foam structure.
