Fill a cocktail shaker halfway with ice cubes.

Add gin, simple syrup, heavy cream, and the whole egg into the shaker.

Shake vigorously for about 20-30 seconds to fully blend and chill the ingredients.

Strain into a chilled coupe glass.

Garnish with freshly grated nutmeg on top.

Serve immediately and enjoy the creamy, smooth texture with a botanical gin finish.