Ideal Freezer Temperature

Setting the ideal freezer temperature is vital to keeping your food safe.

Freezing food stops the growth of bacteria, it does not kill it.

So if the temperature gets too warm bacteria can start to grow again.

But your freezer does more than that.

Freezing food at the proper temperature also preserves nutrients and slows enzymes.

Enzymes are, essentially, what makes fruits and vegetables ripen, over-ripen and rot. This is why many veggies have to be blanched before being frozen for a long time; blanching stops the enzymes altogether.

And while nutrients in produce normally continue to deteriorate over time, freezing stops that process and maintains the nutrients until you're ready to eat your fruits and veggies.

The ideal freezer temperature is 0 Fahrenheit (-18 Celsius) for storing food. And -10 Fahrenheit (-23 Celsius) is recommended when freezing food.

For every five degrees Fahrenheit above zero, the recommended storage time is cut in half. Food stored above 0 Fahrenheit loses more nutrients and loses quality faster than properly frozen food.

The faster food freezes the smaller the ice crystals. The smaller the ice crystals the smaller the change in texture and better quality when thawed.

Of course learning the basics of freezer cooking such as what can and can't freeze, how to prevent freezer burn and oxidation and what containers to use also helps with quality.

Try to set the dial to the proper temperature 24 in advance.

Ideal freezer temperature to keep food fresher longer

Testing for the Ideal Freezer Temperature

If you want to test your freezer to see what temperature it is use a freezer thermometer.

Ideally read the thermometer after the freezer door has been closed for quite awhile, like first thing in the morning, so you get an accurate reading.

Keep Your Freezer Full
A full freezer will stay colder longer, thus using less energy to maintain the ideal freezer temperature. Once frozen, foods should be grouped together to help keep each other cold. It takes less energy to keep frozen foods cold than to cool the air in the freezer.

In the case of a power out a freezer full of frozen food will keep for about two days, a half full freezer will only stay frozen for about half a day.

Just in case your freezer does defrost you should keep it well organized. The lowest part of your freezer should be raw meats, above that cooked meats and meals, then fruits and veggies and dry goods like breads on top.

You can keep your freezer full by adding ice, flour,dry beans, rice or other pantry items when you have extra space. Remember, those solid masses will help keep your freezer more energy effecient and keep your food cold longer in the event of a power out.

MYTH: A freezer that is too cold causes freezer burn.
Temperature does not cause freezer burn. Freezer burn is the dehydration of your food by air. The moisture leaves the food, entering the air in the freezer. Proper moisture-vapor proof freezer quality storage containers are key to preventing freezer burn.

Freezer alarms are another solution you may have heard about. And a freezer alarm that monitors the temperature in the freezer and lets you know if it gets too warm is a great investment if you have lots of power outs or kids that don't shut the door all the time.

What about the fridge?
While we're talking about food safety and temps let's talk about the ideal refrigerator temperature, 35-40 F (1.8-4 C). This range slows the growth of bacteria without risk of freezing foods.

Regardless of what anyone says in terms of saving electricity do not turn your fridge thermostast any higher than 40 F (4 C).

The danger zone is the range in which bacteria in food can grow. The temperature range is 49 F and 140 F (4C and 60C) and food kept in this range for more than four hours should be thrown away to prevent food poisoning and other illnesses.

Here's some awesome pages for you to see:

Freezer Storage Containers

Sweet Potato Fries

Learn more about getting started with freezer cooking.

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