Bringing a dish: under 40°F or over 140°F in transit, and eaten within 2 hours

The two numbers, and why they decide the dish

Bacteria grow most rapidly between 40°F and 140°F, and FSIS calls that band the Danger Zone. It names Staphylococcus aureus, Salmonella Enteritidis, E. coli O157:H7 and Campylobacter as the bacteria that take advantage of it. [S1]

• Cold means 40°F or below. FSIS says to keep cold food cold by placing it in containers on ice. FDA puts the same number on a buffet: cold foods held at 40°F or colder, refrigerated until serving time. [S1] [S5]
• Hot means 140°F or above. FSIS points to chafing dishes, preheated steam tables, warming trays and slow cookers. If you are not serving hot food right away, it says to keep it at 140°F or above. [S1]
• A dish at room temperature is in neither lane. That is the whole problem with a car trip. A covered dish in a back seat is not cold and it is not hot, so the clock is the only thing protecting it. Our reading of the FSIS and FDA pages. [S1] [S5]

Our suggestion: decide hot or cold before you shop, because it changes what you pack, what you cook and what you can honestly promise the host.

The 2-hour rule covers the drive, not just the table

The rule is usually quoted as a serving rule. It is a transport rule too. FSIS says never leave food out of refrigeration over 2 hours, and not more than 1 hour if the temperature is above 90°F. [S1]

• FDA states it as discard advice. Discard perishables left out at room temperature more than 2 hours unless you are keeping them hot or cold, and the safe holding time drops to 1 hour above 90°F. [S5]
• FoodSafety.gov applies it to potlucks by name. Keep hot foods hot and cold foods cold, and put food out in batches so it is not out longer than the two-hour limit. [S9]
• The clock starts when the food leaves temperature control. FSIS ties the two hours to cooking or to removal from a warming appliance. Our reading for a traveler: count from the moment the dish comes out of the fridge, the oven or the cooler, not from the moment you sit down. [S4]
• Above 90°F, halve it. Both FSIS and FDA cut the window to 1 hour in that heat. A warm November kitchen with the oven going is not 90°F, but a car in the sun and a crowded room can get close to it. Our suggestion: if you cannot say what the room temperature is, use the shorter limit. [S1] [S5]

Cold dishes: cooler, ice packs, and the host’s fridge

• Go straight from the fridge to the cooler. USDA says to place perishable foods, including meat, poultry, egg or seafood salads, directly from the refrigerator or freezer into a cooler. That skips the counter time in between. [S2]
• Pack enough cold. USDA says to use a cooler packed with ice or gel packs to hold cold dishes at 40°F or below. FSIS says to use plenty of ice or frozen gel packs, and to keep an appliance thermometer in the cooler. [S2] [S7]
• Ride with the cooler. USDA says to transport your cooler in the air-conditioned passenger compartment of your vehicle, not in a hot trunk. [S2]
• Separate anything raw. FoodSafety.gov says to wrap raw meat and poultry separately and put it at the bottom of the cooler so juices cannot drip onto ready-to-eat food. [S9]
• Fridge on arrival, not the counter. FDA says to keep cold foods refrigerated until serving time. Our suggestion: hand the dish to the host and ask where it can go in the fridge before you take your coat off. [S5]

Our fridge thermometer guide covers the appliance thermometer that makes the 40°F number checkable at home. A cooler thermometer is the same idea on the road.

Hot dishes: insulated, wrapped, and honestly hot

• Wrap it, then insulate it. USDA says to keep hot foods at or above 140°F by wrapping dishes in insulated bags or towels. FSIS says hot food should be kept at 140°F or above, wrapped well and placed in an insulated container. [S2] [S7]
• Heat it through before it leaves. FoodSafety.gov is direct about this: all foods must be fully cooked and reach a safe internal temperature before serving, and these holding methods keep food hot rather than cooking it. [S6]
• Check what your warmer can actually hold. FDA warns that some warmers only hold food at 110°F to 120°F, and says to check the product label to make sure the warmer can hold 140°F or warmer. A slow cooker set to low or warm and left plugged in is one option FoodSafety.gov names, and it says the cooker must stay plugged in. [S5] [S6]
• Stir and check. FoodSafety.gov says to stir food occasionally to even out the heat, and FSIS says to check the temperature frequently to be sure food stays at or above 140°F. [S6] [S7]
• A chafing dish needs water and a live heat source. FoodSafety.gov describes the setup: water pan on the wire rack, water close to but not touching the food pans, heat source underneath, and the water level and heat sources checked during the party. [S6]

Our suggestion: if the drive is long and the dish will not stay above 140°F, do not pretend it will. Take the chill-and-reheat route below instead. FSIS says reheating in a slow cooker, steam table or chafing dish is not recommended because food may stay in the Danger Zone too long. [S7]

Chill and reheat: the route for a long drive

If the trip is too long to hold a hot dish hot, cook it ahead, cool it fast, carry it cold, and reheat it at the host’s house. FSIS supports every step of that.

• Cool it quickly. FSIS says to divide large amounts of food into shallow containers, cut large items into smaller portions, and that hot food can go directly into the refrigerator or be chilled in an ice or cold water bath first. [S4]
• Carry it cold. Then it is a cold dish for transport purposes: cooler, ice or gel packs, 40°F or below. [S2] [S7]
• Reheat to 165°F. FSIS says foods that have been cooked ahead and cooled should be reheated to at least 165°F. FDA says egg dishes such as quiches and soufflés should be thoroughly reheated to 165°F before serving. [S7] [S5]
• Reheat on the stove, in the oven or in the microwave. FSIS lists those three, with an oven set no lower than 325°F, and says to stir, cover and rotate in the microwave and allow standing time. It does not recommend the slow cooker, steam table or chafing dish for reheating. [S7]
• Then hold it at 140°F. Once it is reheated, FSIS says to keep it hot at or above 140°F. [S7]

A stuffing or casserole carried this way is the same math as the turkey itself: FSIS puts stuffing at 165°F whether it cooks in the bird or in a dish. Our carving guide covers what happens at the other end of the oven.

Pies: which ones need the fridge

This is where a lot of Thanksgiving dishes get it wrong, because a pie looks shelf-stable and often is not. FSIS answers the question directly.

• Egg-rich pies need refrigeration. FSIS says homemade egg-rich pies such as pecan, pumpkin, lemon meringue and custard must be kept refrigerated after cooking and cooling. [S8]
• Cream and chiffon pies too. FSIS says cream and chiffon pies must be stored in the refrigerator. [S8]
• Three to four days. FSIS gives that as the refrigerator life for those pies. [S8]
• Fruit pies are the exception. FSIS says fruit pies such as cherry and apple can be stored at room temperature one to two days, or seven days in the refrigerator. [S8]
• Store-bought may differ. FSIS notes that some perishable pies, such as pumpkin and pecan, bought in store bakeries may contain preservatives, and says to consult the bakery for storage information. [S8]

Our reading for the drive: a pumpkin or pecan pie travels like a cold dish, in the cooler or on ice, and goes into the fridge on arrival. A cherry or apple pie is the one you can carry on the seat. If you are unsure which kind you baked, treat it as cold. [S8] [S2]

Your dish’s clock

Pick what you are carrying and how long the trip is. The answer puts the transport advice from USDA, FSIS, FDA and FoodSafety.gov in one place. It is our arithmetic on their rules, not a temperature reading. [S1] [S2] [S5] [S7]

On arrival

• Hand off the temperature, not just the dish. Tell the host whether it is a hot dish or a cold one and what time it left your kitchen. Our suggestion, so the two-hour clock is not a guess. [S1]
• Cold goes in the fridge, hot goes on heat. FDA says to keep cold foods refrigerated until serving time, and to hold hot foods at 140°F or warmer. [S5]
• Serve in small batches. FDA suggests preparing small platters and replacing serving dishes through the party, storing cold backups in the refrigerator and keeping hot dishes in an oven set at 200°F to 250°F before serving. FoodSafety.gov suggests putting food out in batches so it is not out past the two-hour limit. [S5] [S9]
• Do not top up a serving dish. FDA says not to add new food to an already filled serving dish, and to replace nearly empty dishes with freshly filled ones instead. [S5]
• Ice baths need attention. FoodSafety.gov says to drain off the water as ice melts and replace the ice. [S6]
• Four hours on a table is not four hours of safety. FDA says to discard perishables left out at room temperature more than 2 hours unless they are kept hot or cold, and 1 hour above 90°F. [S5]

What goes home, and how

• Pack it cold or keep it hot. The trip home is the same problem in reverse. FDA says leftovers should be refrigerated as soon as guests arrive home and within 2 hours. [S5]
• Divide it up. FSIS says to refrigerate leftovers in covered shallow containers and to divide large amounts into smaller portions so they cool quickly. [S4]
• Three to four days. FSIS gives that as the refrigerator life for leftovers, and 3 to 4 months in the freezer, which is for quality rather than safety. [S4]
• Reheat to 165°F. FSIS says leftovers should reach 165°F, and that sauces, soups and gravies should come to a rolling boil. [S4]
• Turkey has its own numbers. FSIS says to discard turkey, stuffing and gravy left out longer than 2 hours, or 1 hour above 90°F, to use refrigerated leftovers within 3 to 4 days, and to reheat turkey to 165°F. [S3]
• Salads have a shorter life than you think. The FSIS cold storage chart lists store-prepared or homemade egg, chicken, ham, tuna and macaroni salads at 3 to 5 days in the refrigerator. [S7]

Our leftovers guide goes through the cooling and reheating steps in more detail.

Before you leave the kitchen

Quick answers