In a large bowl, using a hand mixer or stand mixer, beat the egg yolks until pale yellow. Slowly add ⅓ cup sugar and beat until fully dissolved. Stir in the milk, cream, (bourbon if adding now) and nutmeg.
In a separate bowl, beat the egg whites until soft peaks form. Add the remaining 1 T of sugar and continue beating until stiff peaks form.
Whisk the egg whites into the egg yolk mixture. Chill.
Pour desired amount of bourbon into a glass, then add in the eggnog. Serve topped with a sprinkle of nutmeg.
Serve, sip, sit back, deep breath, relax, enjoy.