Eggnog is typically spiked with brandy, rum, or bourbon, but brandy is the most traditional alcohol to pair with eggnog according to traditional recipes

. However, you can also use a mixture of dark rum and cognac, or bourbon if you prefer a stronger kick

. The amount of alcohol to add is typically 1 part of your selected spirit to 5 parts prepared eggnog, or 6.5 ounces of liquor for a 1-quart container of eggnog