How Long Eggnog Lasts in the Refrigerator and How to Store It Safely

Shelf Life of Eggnog in Your Refrigerator

Unopened commercial eggnog lasts three to five weeks in the refrigerator, depending on whether it contains alcohol. Alcohol acts as a preservative—eggnog with 20% alcohol by volume (ABV) or higher can last the full five weeks or even longer, while non-alcoholic versions typically last closer to three weeks. Once you open the carton, both types should be consumed within three to five days, regardless of the alcohol content.

Homemade eggnog follows different rules because it lacks the pasteurization and preservatives of store-bought versions. If you make eggnog with raw eggs, it must be consumed immediately or stored in the freezer. If you heat-treat the eggs or use pasteurized eggs, homemade eggnog lasts about two weeks unopened and three to four days after opening. The exact timeline depends on your refrigerator temperature and how carefully you handle the container.

The date printed on commercial eggnog is a "sell by" date, not an expiration date. The product remains safe to drink for several days after that date if it has remained sealed and refrigerated at 40°F or below. Once opened, the clock resets—the printed date no longer matters.

Key Takeaways

• Unopened commercial eggnog with alcohol lasts three to five weeks; non-alcoholic versions last about three weeks.
• After opening any eggnog, use it within three to five days regardless of alcohol content or the printed date.
• Homemade eggnog with raw eggs must be consumed immediately or frozen; heat-treated versions last about two weeks unopened.
• Keep your refrigerator at 40°F or below to reach the maximum shelf life for any eggnog.
• Freezing unopened eggnog extends its life to six months or longer, though texture may change slightly when thawed.

Why Alcohol and Pasteurization Matter

Commercial eggnog sold in most supermarkets is heat-pasteurized, which kills bacteria and extends shelf life significantly. The pasteurization process is what allows unopened cartons to sit safely in your refrigerator for weeks. Non-alcoholic versions rely entirely on this pasteurization; alcoholic versions get a second layer of protection from the alcohol itself, which inhibits bacterial growth.

If you buy eggnog labeled as "aged" or "barrel-aged," it has been stored with alcohol for weeks or months before bottling. These products last even longer than standard alcoholic eggnog—sometimes up to two months unopened—because the extended contact with alcohol has created a more stable product. Check the label for storage instructions, as some aged versions may have different requirements.

Homemade eggnog presents a food safety challenge because raw eggs can harbor salmonella. If you make eggnog with raw eggs and do not heat-treat them, the only safe storage method is the freezer. Some recipes call for heating the egg mixture to 160°F before adding cream and alcohol; this pasteurizes the eggs and allows refrigerator storage for about two weeks. Using pasteurized eggs from the grocery store eliminates this concern entirely.

Proper Storage to Maximize Freshness

Store eggnog in the coldest part of your refrigerator, which is usually the back of a lower shelf, away from the door. The door is the warmest part of the fridge because it opens and closes constantly, exposing contents to temperature fluctuations. Eggnog is sensitive to temperature changes; even a few degrees warmer than 40°F can shorten its life by several days.

Keep the carton sealed until you are ready to pour. Each time you open it, you introduce air and bacteria that can speed spoilage. If you have poured eggnog into a glass and do not finish it, do not pour it back into the original carton—discard it. Cross-contamination from a used glass can introduce bacteria that multiply quickly in the rich, creamy environment eggnog provides.

If you want to store eggnog longer than a few weeks, freezing is your best option. Pour it into an airtight container, leaving about half an inch of headspace because eggnog expands slightly when frozen. Frozen eggnog lasts six months or longer. When you thaw it, the texture may separate slightly—the cream and eggs may not blend as smoothly as fresh eggnog. Shake or stir it well after thawing, and it will usually return to a drinkable consistency.

Signs That Eggnog Has Gone Bad

Spoiled eggnog develops a sour smell, similar to curdled milk. If you open the carton and the aroma is noticeably off, do not taste it—discard it immediately. Smell is the most reliable indicator because bacterial growth can occur without visible changes.

Look for separation or curdling in the liquid itself. Fresh eggnog should be smooth and uniform in color. If you see chunks, a grainy texture, or liquid that has separated into distinct layers that do not blend back together when shaken, the eggnog has begun to spoil. Discard it.

Mold or discoloration on the inside of the carton or on the surface of the eggnog means it is no longer safe. This is rare in commercial eggnog because of pasteurization, but it can happen in homemade versions or if a carton has been damaged or stored improperly for an extended time.

Storing Different Types of Eggnog

Store-bought alcoholic eggnog (20% ABV or higher) lasts the longest—up to five weeks unopened. Keep it sealed in the refrigerator at 40°F or below. After opening, consume within three to five days.

Store-bought non-alcoholic eggnog relies on pasteurization alone and lasts about three weeks unopened. Once opened, use it within three to five days. Some brands add extra preservatives; check the label for specific guidance.

Homemade eggnog with raw eggs must be frozen immediately or consumed right away. Do not store it in the refrigerator, as raw eggs can harbor salmonella. If you want to make eggnog ahead, use pasteurized eggs or heat-treat the mixture to 160°F.

Homemade eggnog with pasteurized eggs or heat-treated eggs lasts about two weeks unopened in the refrigerator and three to four days after opening. Freeze it in airtight containers for up to six months if you want to store it longer.

Temperature and Refrigerator Maintenance

Your refrigerator temperature directly affects how long eggnog stays fresh. At 40°F, the maximum shelf life is reached. At 45°F, eggnog spoils faster—sometimes by several days. Check your refrigerator's temperature with a simple thermometer (they cost a few dollars and are worth having). Place it on a shelf and leave it for a few hours, then read it. If your fridge is warmer than 40°F, adjust the thermostat.

Keep your refrigerator clean and organized so cold air circulates freely. A cluttered fridge with blocked vents cannot maintain consistent temperature. Wipe up spills promptly, especially from eggnog, because the sugars and fats can attract bacteria and create odors. A clean fridge is a fridge that preserves food longer.

If your refrigerator has been without power for more than two hours, eggnog should be discarded. Bacteria multiply rapidly once the temperature rises above 40°F, and you cannot see or smell the growth in the early stages. When in doubt, throw it out.

Frequently Asked Questions

Can I drink eggnog after the sell-by date if it is still sealed?

Yes, if it has been refrigerated continuously at 40°F or below. The sell-by date is when the store should remove it from shelves, not when it becomes unsafe. Unopened, properly stored eggnog is usually safe for several days to a week after that date. Check for off smells or separation before drinking.

What is the difference between eggnog that says "aged" and regular eggnog?

Aged eggnog has been stored with alcohol for weeks or months before bottling, which creates a more stable product and extends shelf life. It often tastes smoother and richer than regular eggnog. Aged versions can last two months or longer unopened, but check the label for specific storage instructions.

Can I freeze eggnog in ice cube trays?

Yes. Freeze eggnog in ice cube trays, then transfer the cubes to a freezer bag once solid. This works well if you want to add small amounts to coffee or desserts throughout the season. The cubes last six months or longer in the freezer. Thaw them in the refrigerator before using.

Is it safe to leave eggnog out on the counter during a holiday party?

Eggnog should not sit at room temperature for more than two hours. If your party is longer than that, keep the eggnog in a bowl nested in ice to maintain a cold temperature. Replace the ice as it melts. After two hours, discard any eggnog that has been left unrefrigerated.

Why does my homemade eggnog taste different after I freeze and thaw it?

Freezing can cause the cream and eggs to separate slightly, which changes the texture and mouthfeel. Thaw it in the refrigerator and shake or stir it well—it usually blends back together. If it remains grainy after stirring, the separation was likely already beginning before freezing, not caused by the freeze itself.