Updated September 2026 by Lydia Martin
Rum is closer to the historical drink. Bourbon is the American default. Using both is better than either alone — and that last point is the answer most guides skip.
Here is how to decide.
The short version
| Rum | Bourbon | |
|---|---|---|
| Historical claim | Stronger — rum preceded whiskey in American eggnog | Later substitution |
| Brings | Molasses, brown sugar, tropical fruit | Vanilla, oak, caramel |
| Risk | Adds sweetness to an already sweet drink | Corn sweetness does the same |
| Best version | Aged or blackstrap, not white | High-rye, bottled-in-bond |
| Verdict | Richer, more traditional | More familiar, more vanilla |
Why rum has the better historical claim
Eggnog descends from posset, made in Britain with sherry or brandy. When the drink reached colonial America, imported brandy carried heavy tariffs while Caribbean rum was cheap and abundant through established trade routes. Rum became the American eggnog spirit long before whiskey did. Bourbon arrived later, as domestic distilling grew.
So if "traditional" is what you're after, the order is brandy, then rum, then bourbon.
Choose rum if
You want depth rather than sweetness. Use an aged rum — a Jamaican or Barbadian rum with real molasses weight, or a blackstrap style. Do not use white rum; it is built to disappear into citrus drinks and it will disappear here too.
Aged rum brings brown sugar, dried fruit and a faint funk that reads as complexity against cream. It is the more interesting choice.
Choose bourbon if
You want vanilla and oak, or you're serving people who expect eggnog to taste the way it does in the US.
Go high-rye and bottled-in-bond. Bottled-in-bond guarantees 100 proof by law, and proof is what survives dairy. Old Grand-Dad Bonded at roughly 27% rye, or Evan Williams Bottled-in-Bond, are the two value picks. Skip wheated bourbons — they go soft against cream.
Or do what the good recipes do
Nearly every serious eggnog recipe uses more than one spirit. The best simple version:
Per cup: 1 oz bourbon plus ½ oz aged rum.
Bourbon supplies vanilla and oak; rum supplies molasses depth. Together they fill in each other's gaps. The historically older pairing is brandy and rum, which is equally good and slightly more elegant.
The rule that applies either way
Proof over price. Cream and sugar flatten nuance, so an expensive bottle tastes much like a cheap one through eggnog. What actually survives is strength. Aim for 100 proof, and buy the inexpensive bottle.
At 80 proof, either spirit reads as faint warmth. At 100, you can taste what you poured.
More in our Bourbon Guide.
Frequently asked questions
Is rum or bourbon more traditional in eggnog?
Rum. It preceded whiskey in American eggnog because Caribbean rum was cheap while imported brandy was taxed. Brandy is older still.
What rum is best for eggnog?
An aged rum with molasses weight — Jamaican or Barbadian. Avoid white rum, which is too light to register.
Can you mix rum and bourbon in eggnog?
Yes, and it makes a better drink than either alone. Roughly 1 oz bourbon to ½ oz aged rum per cup.
How much spirit per cup of eggnog?
About 1½ oz at 100 proof, 2 oz at 80 proof.
Does spiced rum work in eggnog?
It can, but spiced rums carry added sugar and eggnog is already sweet. If you use one, cut the sugar in the recipe.
Is white rum okay in eggnog?
Not really. White rum is built to stay out of the way, which means it disappears entirely against cream.
If you settle on bourbon, the proof-and-rye rules are covered in our best bourbon for eggnog guide.
Sources and method
Bottled-in-bond requirements and bourbon mash bill minimums reflect US federal standards of identity. Historical account reflects eggnog's documented descent from British posset and colonial-era spirit availability. No prices or ratings are invented on this page.