Does Pepperoni Need to Be Refrigerated?

You grabbed a whole pepperoni stick from the unrefrigerated aisle at the grocery store. Now you are home and wondering: should this go in the fridge, or is the pantry fine? Meanwhile the open bag of sliced pepperoni from last week is definitely in the fridge, but you are not sure how much longer it will last.

Does pepperoni need to be refrigerated?

The short answer: It depends on which type you have. A whole, unopened pepperoni stick does not require refrigeration before opening. It is a shelf-stable dry-cured sausage that can be stored in a cool, dry pantry for up to 6 weeks. Once opened, it must be refrigerated and used within 3 weeks per USDA FSIS. Sliced pepperoni must be refrigerated at all times, opened or not.

For more on storing deli meats and cured products, see the Food Storage Guide.

Key Takeaways

Whole stick, unopened: no refrigeration needed; cool dry pantry up to 6 weeks
Whole stick, after opening: must refrigerate; use within 3 weeks
Shelf-stable sliced bags (Hormel, Signature, aisle shelf): no refrigeration before opening; refrigerate after and use within 21 days
Refrigerated-section sliced pepperoni: always refrigerate; use within 7 days of opening
Deli-counter sliced: always refrigerate; use within 3 to 5 days
Left out more than 2 hours after opening: discard (sliced) or refrigerate promptly (whole stick)

Does a Whole Pepperoni Stick Need to Be Refrigerated?

No, not before opening. A whole, intact pepperoni stick is a shelf-stable dry-cured sausage. The USDA FSIS defines dry sausages as products preserved by fermentation, curing agents including nitrates, and drying to a specific moisture level that prevents bacteria from growing at room temperature. An unopened whole pepperoni stick can be stored in a cool, dry pantry for up to 6 weeks without any refrigeration. This is why you find whole sticks hanging on unrefrigerated shelves at grocery stores and gas stations.

Refrigerating an unopened whole stick extends its life further. Kept cold continuously, an unopened whole stick can last indefinitely per USDA guidance, though quality is best within 6 months before the fat starts turning rancid.

Once you cut or open the stick, that changes. The cut end is now exposed to air and bacteria. The USDA FSIS says to refrigerate opened hard or dry sausage and use within 3 weeks. Wrap the cut end tightly in plastic wrap or place in an airtight bag and store in the main body of the fridge, not the door.

Does Shelf-Stable Sliced Pepperoni (Aisle Bags) Need to Be Refrigerated?

Not before opening. Vacuum-sealed bags of sliced pepperoni sold on unrefrigerated grocery shelves (the pizza aisle, snack aisle, or charcuterie section) are shelf-stable products. Brands like Hormel and Signature sell these in the aisles precisely because the vacuum seal replicates the protection of an intact casing, keeping oxygen and bacteria out. No refrigeration required until you break the seal.

Once opened: refrigerate immediately and use within 21 days, per Hormel’s own FAQ guidance. One thing to know: these bags often release a sharp, pungent smell when first opened. That is lactic acid from the fermentation process off-gassing under the vacuum seal. It dissipates within a minute or two and is not a sign the product has gone bad.

Does Refrigerated-Section Sliced Pepperoni Need to Be Refrigerated?

Yes, always. Sliced pepperoni sold from the refrigerated deli section must be kept cold whether the package is open or not. Use within 7 days of opening. Deli-sliced pepperoni cut at the counter is even more perishable: use within 3 to 5 days. The simple rule: match storage to where you bought it. Refrigerated section means keep it refrigerated. Aisle shelf means pantry is fine until opening.

Why Is Some Pepperoni Sold Unrefrigerated?

The answer is the curing and drying process. According to the USDA FSIS, dry sausages are shelf-stable because the combination of salt, fermentation acids (lactic acid from starter cultures), nitrates, and low moisture content creates an environment where harmful bacteria cannot thrive at room temperature. The water activity of a properly dried pepperoni stick is typically below 0.85, which is the threshold below which most pathogenic bacteria cannot grow.

This is the same principle behind beef jerky, country ham, and other shelf-stable cured meats. The curing and drying process does the preservation work, making refrigeration optional before opening rather than required.

Note: The USDA also flags that because dry sausages are not cooked, higher-risk individuals including pregnant women, older adults, young children, and people with weakened immune systems should consider avoiding uncooked dry sausages. The USDA specifically cites E. coli O157:H7 as a concern and now tests fermented sausages for E. coli O157:H7, Salmonella, and Listeria monocytogenes. Cooking pepperoni (as on pizza) eliminates this concern entirely.

How to Store Each Type of Pepperoni

Whole Pepperoni Stick (Unopened)

Store in a cool, dry place away from direct sunlight and heat sources.
Refrigerating extends life further; unopened lasts indefinitely refrigerated.
Do not freeze an unopened whole stick unless storing beyond 6 months.

Whole Pepperoni Stick (After Opening)

Wrap the cut end tightly in plastic wrap or place in a zip-top bag with air removed.
Refrigerate immediately on an interior shelf, not the door.
Use within 3 weeks of opening.
Slice into portions and freeze before the 3-week window closes if needed.

Shelf-Stable Sliced Bags (Hormel, Signature, Aisle Shelf)

No refrigeration needed before opening. Store in a cool, dry pantry.
Once opened, refrigerate immediately in a sealed container or resealable bag.
Use within 21 days of opening per Hormel’s guidance, or by the expiration date.
The strong smell on first opening is normal lactic acid off-gassing. Not spoilage.

Refrigerated-Section Sliced and Deli-Counter Pepperoni

Recipes That Use Pepperoni

Working through sliced pepperoni before it turns? These low-carb heart-shaped tortilla pizzas use pre-sliced pepperoni as the main topping and take under 20 minutes start to finish. For something more substantial, gluten-free stuffed mushrooms pair well with finely chopped pepperoni worked into the filling. For the USDA’s complete guidance on dry sausage storage and safety, see the USDA FSIS sausage and food safety page.

FAQ: Can Pepperoni Be Left Out Overnight?

It depends. A whole, unopened pepperoni stick left out overnight in a cool dry environment is fine: it is shelf-stable. An opened stick or any sliced pepperoni left out at room temperature overnight should be discarded. The USDA 2-hour rule applies: perishable meat left at room temperature for more than 2 hours enters a bacterial growth window that makes it unsafe regardless of how it looks or smells.

FAQ: Does Pepperoni Need to Be Refrigerated After Opening?

Yes, always. Once a whole pepperoni stick is cut or a package of sliced pepperoni is opened, the contents must be refrigerated. Wrap or seal tightly and store at 40 degrees Fahrenheit or below. Use whole sticks within 3 weeks of opening. Use sliced pepperoni within 7 days of opening. For full shelf life guidance and spoilage signs, see does pepperoni go bad.

FAQ: Does Pepperoni Need to Be Refrigerated Before Opening if Bought From the Refrigerated Section?

Yes. If it was sold from the refrigerated section of the grocery store, keep it refrigerated. Some whole sticks are sold refrigerated because they have been packaged differently, contain less drying, or the retailer simply stores all cured meats cold as a consistent policy. When in doubt, match the storage to where you bought it: if it came from a refrigerated case, keep it cold. If it came from an unrefrigerated shelf, pantry storage is fine until opening.