Safe Food Temperature Chart for Commercial Kitchens

Safe food temperature chart

Print it, tape it inside a cupboard door, and argue with it only after reading your local code. The sections below explain each row.

Why the numbers are where they are

The so-called danger zone is simply the band between chilled and properly hot where most food-poisoning organisms reproduce fastest. Below it, they idle. Above it, they die off. Each figure in the chart is a boundary of that band, or a point on the way through it.

Different microbes explain different rows. Salmonella and Campylobacter, common on raw poultry, are why chicken gets the highest cooking target. Listeria tolerates refrigeration surprisingly well, which is why fridges need to run cold and ready-to-eat food cannot sit there indefinitely. Clostridium perfringens loves big joints and stews that cool slowly, and Bacillus cereus is the classic villain of rice left out overnight. Both form tough spores that shrug off ordinary cooking, then germinate as the pot drifts downward. Hence the fuss about cooling.

None of this requires a microbiology degree. It does explain why the limits are not arbitrary, and why a reading two degrees over is worth a second look rather than a shrug.

Fridges, cold holding and freezers

Cold slows bacterial growth; it does not stop it. That is why the limits sit just above freezing rather than miles below. In the US, the Food Code requires cold-held food to stay at 41°F or below. Most operators set their reach-ins and walk-ins a few degrees lower, because every door opening during service pushes warm air in, and a fridge set exactly at the limit will spend much of dinner above it.

The UK has two figures, and people mix them up constantly. The FSA recommends setting fridges and chilled displays to 5°C or below. Separately, in England, Wales and Northern Ireland it is an offence to keep food that needs chilling above 8°C, with some exceptions. Think of 5°C as the target and 8°C as the cliff edge. Scottish rules are worded differently, so businesses there should check Food Standards Scotland guidance, though the practical advice is much the same.

Freezers are simpler. USDA advises 0°F or below; the FSA says -18°C or below. Those are effectively the same number in different units. A freezer reading a few degrees warm during a defrost cycle, or straight after a big delivery, often recovers within the hour. One that stays warm needs attention before the ice cream turns to soup.

US kitchens also have a clock on cold food: ready-to-eat TCS food made on site and held longer than a day must be date-marked and used within 7 days at 41°F or below. That is a labelling job rather than a thermometer job, but it depends entirely on the fridge actually holding temperature.

The fridge and freezer temperature log gives US kitchens a month per page, with morning and evening readings for two fridges and a freezer. The UK fridge temperature record sheet does the same in °C, with both the 5°C target and the 8°C maximum printed at the top.

Hot holding

Hot holding means keeping cooked food warm for service in a steam table, bain-marie, soup kettle or heated cabinet. The logic mirrors refrigeration: keep the food above the range where bacteria multiply quickly. The US figure is 135°F or above. The UK figure is 63°C or above, which is a few degrees warmer.

The UK rule includes a useful allowance: food can dip below 63°C for up to 2 hours, once only. That covers a carvery tray waiting on the pass or a batch being plated for a function. After that window, the SFBB approach is to reheat it, chill it, or throw it away, and write down which. Nobody gets to reset the clock by nudging the dial.

Hot-holding equipment is designed to keep hot food hot. It is not designed to heat cold food up, and trying to use it that way leaves food lingering in the danger zone for far too long. Bring food up to temperature on the stove or in the oven first, then transfer it.

The US hot holding temperature log and the UK hot holding record sheet both give each item a time in, four timed checks and a column for what happened to it at the end. Set a check interval and stick to it; many kitchens choose every two hours.

Cooking temperatures

Cooking kills the organisms that storage merely slows down, which is why the target is a core temperature, measured in the thickest part, not the surface of the pan. Visual cues such as clear juices or a golden crust are unreliable, particularly with marinated, smoked or breaded products. The two countries approach this differently.

The FDA Food Code sets a figure per type of food. Poultry, stuffed meats, stuffed pasta and stuffing containing meat need 165°F for under a second. Ground and other non-intact meat and fish need 155°F for 17 seconds, or an allowed alternative. Intact meat and fish fillets need 145°F for 15 seconds, with whole roasts following a separate time chart. Raw eggs cooked for a buffet line rather than to order need 155°F for 17 seconds.

The FSA instead lists time and temperature combinations that apply to food in general: 80°C for 6 seconds, 75°C for 30 seconds, 70°C for 2 minutes, 65°C for 10 minutes or 60°C for 45 minutes. The trade-off is logical: the lower the temperature, the longer the food has to stay there. In a busy kitchen, 75°C is the easy one to check, because the probe only needs to settle for half a minute.

Record cooking temperatures for batches that will be cooled and stored, reheated, or served to vulnerable groups. The US cooking, cooling and reheating log and the UK cooking temperature record sheet both start each row with the time and the core reading at the end of cooking.

Cooling cooked food

Cooling is where good kitchens get caught out. A deep pot of chilli or a whole joint left on the side to "cool down a bit" can stay warm in the middle for hours, which is exactly the range bacteria enjoy. Spores that survived cooking wake up and start dividing.

The US sets a two-stage limit. Cooked food must drop from 135°F to 70°F within 2 hours, then reach 41°F or below within 6 hours in total. The first stage is the tighter one, because the middle temperatures are where growth is fastest. If a batch misses the 2-hour mark, your corrective action plan decides whether it is reheated and cooled again or discarded.

The FSA publishes no numeric cooling time. Its advice is to cool cooked food as quickly as possible, for example by dividing it into smaller portions or spreading it in shallow trays, and then refrigerate it. Some councils or company procedures set their own target; if yours does, write it on the sheet and follow it. The UK record sheet asks for the time food came off the heat, the time it went into the fridge, and the method used, so an EHO can see how long it took.

• Split large batches into shallow containers, no deeper than a few inches or centimetres.
• Stand pans in an ice bath, or use ice wands, and stir.
• Leave lids off, or loosely on, until the food is cold.
• Use a blast chiller if you have one. That is what it is for.
• Do not stack warm containers tightly in a fridge, which then warms everything around them.

Reheating

In the US, food that was cooked and cooled, then reheated for hot holding, must reach 165°F for 15 seconds in every part, within 2 hours. The time limit matters as much as the temperature: reheating slowly in a steam well just rewarms the danger zone.

In Scotland, reheated food must reach at least 82°C unless that would spoil it. England, Wales and Northern Ireland set no single legal reheating figure; the usual practice is to reheat once only, until piping hot all the way through, and probe it to confirm. Many kitchens simply use one of the FSA cooking combinations as their reheating target, which keeps the arithmetic consistent.

Thawing frozen food

Defrosting is the quiet gap in most charts, because it has no single target figure. The principle is that the outside of a frozen item should never sit warm while the centre is still solid. In practice that means planning ahead: move a frozen turkey crown, a tray of lasagne or a bag of prawns into the bottom of the fridge the day before, on a tray so drips cannot reach anything below. Thawing under cold running water or in a microwave, followed immediately by cooking, are the usual fallbacks when somebody forgot.

What does not work is leaving the box on the counter overnight because it is big and the fridge is full. Large items can take a surprisingly long time, so check that the middle has softened before cooking, and adjust portion sizes if the timing is always tight.

Buffets, counters and displays

Food on display behaves differently from food in storage. Salad bars, sandwich chillers, sushi counters, carveries and breakfast buffets are opened, stirred, topped up and breathed on by customers all shift, and their surfaces warm faster than the deep middle of a pan. Probe the food in the pans nearest the front and the edges, where warmth builds first, not just the centre tray.

Refill with fresh containers rather than tipping new food onto old, so the time each batch has spent out is clear. On a carvery or a hot counter, write the time each tray goes out; that is exactly what the time-in column on the hot holding sheet is for.

Receiving deliveries

Temperature control starts at the back door. US rules say refrigerated TCS food must be 41°F or below on arrival, raw shell eggs must arrive in equipment holding 45°F or less, and frozen food must arrive frozen, with no sign of thawing.

The FSA gives no numeric acceptance figure. It advises spot-checking deliveries for time, temperature and quality, rejecting chilled or frozen food that has not been kept cold enough, contacting the supplier and noting it down. The legal 8°C chill limit still sits in the background. Probe between packs rather than piercing sealed goods, and put chilled and frozen items away before checking the dry stock.

How to measure properly

Every number in the chart assumes the reading is honest. Three habits make it so.

• Probe the food, in the right place. For cooking, push the tip into the thickest part or the centre of the batch, avoiding bone and the pan base. For hot holding, stir first, then probe the food rather than the water around the container. For fridges, a thermometer inside the unit, on a middle shelf, beats the display on the door.
• Let it settle. Digital probes need a few seconds to stop climbing. Write the figure it settles on, not the first one that looks acceptable.
• Clean between uses. Wipe and disinfect or sanitize the probe after each reading, especially when moving from raw to cooked food. Probe wipes exist for a reason. Keep electronic probes out of the dishwasher unless the maker permits it; submerging the handle ruins most of them.

Then check the instrument itself. In the US, food thermometers scaled in Fahrenheit must be accurate to ±2°F. The USDA ice-water check expects a reading of 32°F with the stem at least 2 inches into stirred iced water; the boiling-water check expects 212°F at sea level, and lower at altitude. The US thermometer calibration log has columns for both, a pass column and your local boiling point.

In the UK, the FSA says a digital probe should read between -1°C and 1°C in iced water and between 99°C and 101°C in boiling water. Outside those ranges, replace it or send it back for calibration. The probe thermometer check record lists each probe by ID with both readings and a pass column. Monthly is a common rhythm, or whatever the manufacturer suggests, plus any time a probe is dropped.

Choosing thermometers

Not every thermometer suits every job. A small kitchen usually needs two or three kinds.

• Digital probe (thermistor or thermocouple). The workhorse for cooking, cooling, reheating and hot holding. Fast, precise, and easy to verify. Buy one with a thin tip so it does not leave craters in fish fillets.
• Dial stem thermometer (bimetallic). Cheap and battery-free, but slow, and it measures along a length of stem rather than at the point, so it struggles with thin items such as burgers.
• Hanging or shelf thermometer. Lives inside the fridge or freezer. Some show a maximum and minimum since last reset, which reveals what happened overnight.
• Infrared gun. Reads surfaces only. Handy for a quick scan of a delivery or a display, useless for core temperature, because it never sees inside the food.
• Wireless data logger. Records readings every few minutes and can raise an alarm. Excellent for walk-ins, as long as someone responds to the alerts and the batteries are replaced.

Label every instrument with an ID, keep a spare in a drawer, and replace any probe with a cracked casing or a loose cable. A thermometer that cannot be cleaned properly is a contamination risk in its own right.

Heatwaves, busy nights and other pressures

Refrigeration struggles when conditions are extreme. On a sweltering afternoon, a kitchen might be far warmer than the room the fridge was designed for, and the compressor runs flat out just to keep level. Dusty condenser coils, blocked vents, overloaded shelves and a door propped open during a delivery all make it worse. Readings that were comfortable in March can creep up in July.

Watch for the pattern rather than a single spike. If afternoon readings climb every day of a heatwave, clean the coils, clear space around the unit, reduce how often the door is opened, and move the most sensitive items such as dairy, cooked meats and prepared salads to the coldest cabinet. Portable units at outdoor events, vans and market pitches need even closer attention, because they fight direct sun as well.

What to do when a reading is wrong

An out-of-range reading is not a failure. An out-of-range reading with nothing written next to it is. The sequence below works for most situations.

1. Check again straight away with a second, known-good thermometer. Rule out the instrument before blaming the equipment.
2. If the reading is confirmed, protect the food first: move chilled stock to another fridge, return hot-held food to the stove, or get a cooling batch into ice.
3. Decide what happens to the food using your procedures. Some things can be saved by prompt action; others cannot, and throwing them away is cheaper than a sick customer.
4. Find the cause if you can: a door left ajar, a blocked fan, a failed element, an overloaded chiller, a dial knocked during cleaning.
5. Write it down in the corrective action or action taken column: what you found, what you did, the time, and your initials.
6. Recheck later and record that reading too. The second number is the proof that the fix worked.

Repeat offenders deserve an engineer, not another heroic note. A fridge that needs rescuing every Friday is telling you something, and the log is where it says it. File the engineer’s invoices alongside, so the repair history travels with the readings.