Combine the sugar, nutmeg, ginger, cinnamon and salt in a large bowl.
8 oz sugar, 1 teaspoon nutmeg, ½ teaspoon ground ginger, 1 teaspoon ground cinnamon, pinch salt
Add the egg yolks and whisk until the mixture gets thick and runs off the whisk like a ribbon.
Add the dark rum, white rum and whiskey to the mixture and whisk to combine.
½ cup dark rum, ½ cup white rum, ½ cup whiskey
Add the cream, milk and vanilla extract and whisk to combine.
2 cups whole milk, 1 cup heavy cream, 1 teaspoon vanilla extract
Pour the mixture into an airtight container and seal it up. Optionally add one cinnamon stick to the mixture while it ages (only do this if you like it to be very cinnamony).
2 cinnamon sticks
You could drink it right away, but it will get better as it ages. Try to refrigerate this for at least two weeks.
Store in the refrigerator until ready to drink.
When the aging is done, serve up the drink. Add a cinnamon stick garnish to each serving glass and fill the glass with the Eggnog. You can also grate some fresh nutmeg on top as another garnish.