What is the measure of Grand Marnier in a French Connection?

In a French Connection cocktail, the standard measure of Grand Marnier is typically 1/2 oz. This liqueur is used to give the cocktail its distinctive flavor, which balances the other ingredients. The proportions are carefully crafted to ensure that the taste is neither overwhelming nor underwhelming, making 1/2 oz the ideal amount for this particular drink.

Using a measure that is larger, such as 1 oz or 1 1/2 oz, could dominate the flavor profile and alter the intended balance of the cocktail. These larger measures would make the drink sweeter and may mask the other flavors present. Therefore, the choice of 1/2 oz helps maintain the integrity of the French Connection, allowing it to be enjoyed as intended.