Add the bourbon over a large ice ball in a rocks glass.

Next add the bitters and simple syrup and lightly stir together.

Add the chilled eggnog and stir until completely combined. For a frothy layered effect, use a small hand mixer to froth up the eggnog and then pour right on top.

Express an orange peel over top of the drink and place peel inside the glass as a garnish.

Top with freshly grated nutmeg and serve immediately, enjoy your Eggnog Old Fashioned!