Prep Glass: Fill a coupe glass with ice. Give it a stir to chill it and set it aside.
Prep Shaker: Crack 1 whole egg into your cocktail shaker.
Add Simple Syrup: Measure and pour ½ oz simple syrup into the shaker.
Add Brandy: Pour 2 oz Brandy into the shaker.
Shake Well: Fill the shaker with ice. Close it well and shake the ingredients vigorously for about 15 seconds.
Dry Shake: Open the shaker. Using the cocktail strainer, pour the liquid in the other tin and discard the ice. Close the shaker again and shake another time, for 15-20 seconds, without ice this time.
Strain: Discard the ice inside the coupe glass. Using the fine strainer, strain the mixture into the chilled glass.
Garnish: Grate some nutmeg over the top for garnish and serve immediately.