“Cook. As often as you can.”
— Michael Pollan
Introduction
If there’s one thing I always try to do when I cook, it’s to make a little more than we need.
Not because I want to eat the same meal all week, but because I know my future self will thank me for it.
A stew that only needs reheating after a busy day.
A lasagne ready to go into the oven.
A portion of rice prepared for a day when there’s no time to cook.
Cooking once and eating several times doesn’t just save time; it can also help us eat well on those days when cooking from scratch simply isn’t realistic.
A few years ago, however, I started reading about food safety recommendations and realised I had quite a few questions.
How long can cooked food safely stay out of the fridge?
Should you wait until it’s completely cold before refrigerating it?
Is it true that some foods should never be reheated?
And how many times can you safely reheat the same meal?
The good news is that today’s food safety recommendations are much simpler than they might seem.
In reality, just a few straightforward habits are enough to store food safely and continue enjoying those meals that somehow taste even better the next day.
In this guide, we’ll go through the process step by step.
What Do Food Safety Guidelines Recommend?
If we had to summarise the advice from organisations such as the UK’s Food Standards Agency (FSA), the U.S. Food and Drug Administration (FDA) and the Spanish Ministry of Health, it would come down to one simple idea:
It’s usually not the reheating itself that causes problems, but the amount of time food spends at temperatures where bacteria can multiply.
That’s why food safety doesn’t begin when we reheat a meal.
It begins the moment we finish cooking it.
Once your food is ready, the goal is simple: cool it, store it properly and only reheat the portion you’re going to eat.
With just a few simple habits, we can significantly reduce the risk of bacterial growth while continuing to enjoy all the benefits of cooking extra.
How to Store and Reheat Food Safely: Step by Step
Step 1. Cool Food as Soon as Possible
If you know you won’t be eating the entire meal straight away, don’t leave the pot sitting on the kitchen worktop for hours.
Instead, divide the food into shallow containers so it loses heat more quickly.
There’s no need to put it into the fridge the moment it comes off the hob. Simply leave it for a few minutes until it has stopped steaming heavily, then refrigerate it as soon as possible.
This small habit is one of the most important steps you can take to keep food safe.
Step 2. Store Food in Small Portions
This is one piece of advice that has completely changed the way I organise leftovers.
Instead of storing an entire stew or a whole batch of pasta in one large container, I prefer to divide it into individual portions or meals for two.
Why?
Because that way I only reheat the amount we’re actually going to eat.
The rest stays safely refrigerated or frozen without going through repeated heating and cooling cycles.
Not only is this a safer approach, but it also makes meals over the following days much more convenient.
Step 3. Refrigerate or Freeze Depending on When You Plan to Eat It
If you expect to eat the meal within the next two or three days, keeping it in the fridge will be perfectly adequate.
Try not to overfill your fridge. Leaving enough space for cold air to circulate helps maintain a more even temperature and allows food to cool more efficiently.
If you think it will be longer than that, it’s best to freeze it while it’s still at its best quality.
Freezing not only helps reduce food waste but, as we explored in a previous article, it also preserves the vast majority of nutrients remarkably well.
Step 4. Defrost Food Safely
If you’ve frozen leftovers, the safest way to defrost them is in the fridge.
Just move the container from the freezer to the fridge the night before, or give it enough time to defrost slowly and evenly before you plan to eat it.
This helps keep the food at a safe temperature while it thaws.
And if you forget to take it out in time, don’t worry — you can still reheat it straight from frozen.
It will simply need a little longer, and you should make sure it is piping hot all the way through before serving.
Step 5. Only Reheat the Amount You’re Going to Eat
When it’s time to enjoy your meal, only take out the portion you actually need.
Reheat it until it is piping hot all the way through.
If you’re using a microwave, it’s a good idea to stir the food halfway through heating so that the heat reaches the centre of the dish as well.
For soups, stews and casseroles, bring them back to a gentle simmer before serving.
The aim isn’t for the food to be merely warm — it should be thoroughly heated throughout.
Step 6. Avoid Reheating the Same Food More Than Once
This recommendation often surprises people, but it makes good sense.
Each time food is cooled and reheated, it passes once again through the temperature range where bacteria can multiply if it isn’t handled correctly.
That’s why it’s best to reheat only the amount you intend to eat.
This is also why storing leftovers in smaller portions from the beginning is such a useful habit.
It’s one of those simple changes that makes everyday life easier while also following current food safety recommendations.
What’s the Best Way to Reheat Different Types of Food?
Not every meal reheats equally well.
Choosing the right method doesn’t just help keep food safe — it also preserves its texture and flavour.
There isn’t one perfect reheating method.
What matters is that the food is heated thoroughly and evenly, including right through to the centre.
The Most Common Mistakes
Very often, it’s not the recipe that matters most, but the small habits we repeat without thinking.
These are some of the most common mistakes:
- Leaving cooked food on the kitchen worktop for hours to cool. The longer food stays at room temperature, the greater the opportunity for bacteria to multiply.
- Storing large amounts in one deep container. Shallow containers allow food to cool much more quickly.
- Only warming food through instead of reheating it properly. Food should be piping hot throughout, including in the centre.
- Reheating the same container again and again. It’s much better to take out only the portion you’re going to eat.
- Defrosting food on the kitchen worktop. Whenever possible, defrost food in the fridge or use the microwave’s defrost setting if you’re going to cook or eat it straight away.
None of these habits takes much effort to change.
Yet together, they can make a real difference.
Conclusion
For a long time, I thought that storing and reheating food safely was almost an art reserved for professional kitchens.
Now I know it doesn’t have to be that complicated.
Most food safety advice can be summed up in just a few simple habits:
- Cool food reasonably quickly.
- Store leftovers in suitable containers.
- Only reheat the amount you’re actually going to eat.
- And avoid leaving food at room temperature for any longer than necessary.
These are small habits that take very little time but, before long, simply become part of everyday life.
In the end, cooking extra doesn’t just save time.
It also helps us eat better, waste less food and enjoy the peace of mind that comes from knowing we’re storing it safely.
And I think that’s one of the loveliest things about learning more about food.
You realise that looking after our health often comes down to doing a little better what we’ve been doing all along.
Glossary
Food safety: The practices used to prevent food from causing illness during preparation, storage and consumption.
Danger zone: The temperature range in which bacteria multiply most rapidly (approximately 5°C to 60°C).
Refrigeration: Storing food at temperatures of 4–5°C or below to slow the growth of harmful microorganisms.
Freezing: A method of preserving food by stopping bacterial growth, allowing it to be stored for longer with very little loss of nutritional quality.
References
- Food Standards Agency (UK). Chilling, Cooling and Reheating Food Safely.
- UK Health Security Agency. Food Safety Guidance.
- U.S. Food and Drug Administration (FDA). Safe Food Handling.
- United States Department of Agriculture (USDA). Leftovers and Food Safety.
- Spanish Agency for Food Safety and Nutrition (AESAN). Recommendations for the Safe Storage and Reheating of Food.
- World Health Organization (WHO). Five Keys to Safer Food.