Eggnog is one of those holiday staples that feels “fine” long after it should be questioned. The problem is that most eggnog is dairy-based, and dairy does not give you much forgiveness once a carton or bottle has been opened.
A reliable rule for U.S. kitchens is this: opened, commercial eggnog usually lasts about 3–5 days in the refrigerator, while homemade eggnog is typically best within 2–4 days.
Spiked or liqueur-style eggnog can last longer, but the label matters because the product may still contain real dairy cream.
This guide breaks down the timelines by type (regular vs. alcoholic vs. homemade), explains what to do about “expiration dates,” and covers brand-specific questions like Evan Williams, Southern Comfort, Pennsylvania Dutch, Skrewball, Benchmark, and Kirkland.
Does eggnog go bad if refrigerated?
Yes. Refrigeration slows bacteria growth, but it does not stop it. Eggnog is perishable because it typically contains dairy (and sometimes egg), and those ingredients still degrade over time.
The key is that “refrigerated” must be cold enough. In the U.S., food safety guidance emphasizes keeping your refrigerator cold (40°F or below) and not letting perishables sit out.
Does eggnog need to be refrigerated after opening?
Almost always, yes.
If it is a typical grocery-store carton of eggnog (non-alcoholic dairy beverage), it must be refrigerated and treated like milk.
If it is an alcoholic eggnog or “eggnog liqueur,” do not assume the alcohol makes it shelf-stable after opening. Many popular spiked eggnog products are made with real dairy cream and specifically instruct you to refrigerate after opening (examples below).
How long does eggnog last after opening?
Here is the simplest practical chart to follow at home.
Eggnog shelf life in the fridge (USA)
| Type of eggnog | How long it lasts after opening (refrigerated) | Notes |
|---|---|---|
| Commercial eggnog (store-bought dairy) | 3–5 days | Keep tightly sealed, store on an interior shelf |
| Homemade eggnog | 2–4 days | Shorter window; do not gamble if you used raw eggs |
| Evan Williams Egg Nog (30 proof) | Up to 6 months after opening (refrigerated) | Manufacturer guidance; still contains dairy cream |
| Pennsylvania Dutch Egg Nog | Refrigerate after opening; consume within 6 months | Brand guidance; dairy-based |
| Southern Comfort eggnog products | Keep refrigerated; “once opened consume within X days” varies by product/retailer labeling | Follow the exact container instructions |
| Skrewball eggnog | Label indicates refrigerate after opening | Treat as dairy-based; follow label |
The big takeaway is that regular dairy eggnog is a “days” product, while certain alcoholic eggnogs are a “months” product if the manufacturer says so. You should not apply the “months” rule to a normal carton.
Does eggnog need to be refrigerated overnight?
If the bottle/carton is opened and it’s a dairy beverage, yes. Overnight at room temperature crosses a safety line for perishables.
U.S. guidance is the “two-hour rule”: perishables should not sit out for more than 2 hours at room temperature, or 1 hour if it’s above 90°F.
Eggnog clearly falls into the perishable category, so leaving it out overnight is not recommended.
Can eggnog last out of the fridge?
Only briefly.
If you are serving eggnog at a party, it can be poured and enjoyed at room temperature, but it should not remain out for more than 2 hours (or 1 hour above 90°F).
If it has been sitting out longer than that, the safest decision is to discard it, even if it still smells “okay.”
Can you drink eggnog at room temperature?
You can drink it at room temperature from a comfort standpoint, but you should not leave it there for long. The practical approach is to pour what you’ll drink and return the container to the refrigerator promptly (within the two-hour rule).
How do you know if eggnog has gone bad?
Eggnog doesn’t always give a dramatic warning. If you notice any of the following, it’s a discard situation:
- Sour or “off” smell that wasn’t there before
- Curdling, chunky texture, or heavy separation that does not remix
- Discoloration or any sign of mold around the cap or lip
If you are uncertain and it has been open longer than the recommended window, do not taste-test it “to see.” With dairy, the downside is not worth it.
How long is eggnog good for unopened?
Unopened shelf life depends on the product type.
For standard refrigerated dairy eggnog, the safest answer is: follow the “use by” date and keep it refrigerated until then. Once opened, use the 3–5 day guideline.
For certain alcoholic eggnogs, the manufacturer may provide a longer unopened timeline. Heaven Hill (the producer behind Evan Williams eggnog products) recommends their eggnog products be consumed within 12 months if unopened, and within 6 months after opening (refrigerated).
Pennsylvania Dutch also notes best quality within 12 months after production, and once opened: refrigerate and consume within 6 months.
How long does 30 proof eggnog last? (And does alcoholic eggnog expire?)
Alcoholic eggnog can still expire or become unpleasant over time because it often contains dairy cream and sugar, both of which change with storage. What alcohol can do is extend stability for certain products, which is why some brands publish “months” guidance rather than “days.”
Evan Williams’ official eggnog page lists the product at 30 proof. Their producer (Heaven Hill) recommends consuming it within 12 months unopened, and once opened: refrigerate and consume within 6 months.
For other “eggnog liqueur” products, rely on the label. If it says “refrigerate after opening,” treat it like a perishable product and store it cold immediately.
Brand notes-
Evan Williams Egg Nog
- Needs refrigeration after opening, and the producer recommends consuming within 6 months once opened.
- “Where can I find Evan Williams Egg Nog?” The brand provides a store locator where you can search by ZIP code and also indicates online ordering options through partners.
Southern Comfort eggnog
- Packaging and store listings frequently instruct “keep refrigerated,” and some specify a post-opening window (for example, certain Southern Comfort eggnog products show “once opened consume within 14 days”).
- Because the time can vary by product, use the exact wording on your bottle/carton.
Pennsylvania Dutch Egg Nog
- The official brand guidance states refrigeration isn’t necessary until opened, but once opened you should refrigerate and consume within 6 months.
Skrewball eggnog
- The product page indicates “refrigerate after opening,” which is your operating instruction.
Benchmark eggnog
- Treat it as dairy-based unless the label explicitly says otherwise. For brand-specific timing, rely on the bottle instructions first.
Kirkland eggnog
- Kirkland has both non-alcoholic seasonal eggnog and (in some years) alcoholic eggnog-style products. Use the type rules above: dairy carton = days; alcoholic product = follow the bottle label and manufacturer guidance.
How long is eggnog good for after the expiration date?
For eggnog, the safest approach is conservative: if it is past the “use by” date, especially after opening, discard it.
Some consumers treat “best by” as a quality date, but eggnog is a high-risk category because it’s dairy-based, often sweet (which can mask early “off” notes), and commonly opened and closed repeatedly during holiday use. Your best practice is to follow:
- The printed date on the container for unopened product
- The 3–5 day window after opening for commercial eggnog
Evan Williams eggnog expiration date location on bottle
This varies by bottling run and packaging. Many alcoholic dairy products use a lot code or inkjet print near the neck/shoulder, back label area, or bottom. If you cannot find a clear date, don’t guess based on appearance alone. Use the producer guidance (12 months unopened; 6 months opened and refrigerated) and treat it as seasonal.
FAQs
How long does opened eggnog last in the fridge?
Commercial eggnog is typically 3–5 days in the refrigerator after opening.
Does eggnog need to be refrigerated after opening?
Yes, in almost all cases. If it is dairy-based, refrigerate immediately after pouring.
How long is eggnog good for unopened?
For regular refrigerated eggnog, follow the container date and keep it refrigerated. Some alcoholic eggnog brands recommend up to 12 months unopened (check the producer’s guidance).
How long does Evan Williams eggnog last in the refrigerator after opening?
Heaven Hill recommends refrigerating after opening and consuming within 6 months.
Does Evan Williams eggnog need to be refrigerated?
Yes after opening, and the product is intended to be served chilled.
Does alcoholic eggnog expire?
Yes. Even if alcohol extends stability, dairy-based products still change over time. Follow label guidance and discard if odor/texture changes.
Can eggnog last out of the fridge?
Only briefly. Follow the two-hour rule for perishables (1 hour if above 90°F).
Can you drink eggnog at room temperature?
You can drink it, but do not let it sit out for more than two hours.
Conclusion
For most U.S. households, the safest and most useful rule is simple: opened, store-bought eggnog lasts about 3–5 days in the fridge, while homemade eggnog lasts about 2–4 days. Eggnog should not sit out at room temperature beyond the two-hour rule, and “overnight on the counter” is a discard situation for perishable dairy drinks.
Alcoholic eggnog is different only when the manufacturer explicitly says it is. For example, Evan Williams (30 proof) and Pennsylvania Dutch both provide longer post-opening windows if refrigerated, but you should still treat them as dairy-based and store them cold after opening.