Frozen Food With Ice Crystals


In the freezer section of your grocery store, it’s easy to get overwhelmed by the variety of frozen foods with ice crystals. There are so many choices: vegetables, meats, TV dinners, and desserts.

You might have heard that frozen food products have ice crystals in them. But what exactly are these ice crystals? Are they dangerous? And is there a way to avoid buying foods with ice crystals?

If you’re wondering about these questions, you’ve come to the right place! Keep reading to learn more about frozen food and ice crystals.

Frozen Food With Ice Crystals

Some of us college students practically live on frozen food. Frozen food convenient, easy to store, and lasts a long time. However, after a while, these weird ice crystals start to form on the packaging and on the surface of food. What do ice crystals on frozen food mean? How do these crystals form? Does it mean your food has gone bad? 

Freezer Burn

There is actually a name for this condition in which ice crystals form on frozen food: freezer burn. Freezer burn is the result of air coming into contact with food. When food is frozen, a bunch of water molecules within the food form ice crystals.

Water molecules prefer the coldest place in your freezer. The molecules migrate from the food to the coldest place they can find, which is often the side of your freezer. The loss of these water molecules causes the food to become dehydrated. 

Is It Safe To Eat Freezer-Burned Food?

strawberry, sweet, berry, candy, frozen strawberries, smoothie, chia seeds, ice, blender
Caroline Ingalls

The good news is that freezer burn doesn’t cause illness. While the color changes and dry spots that freezer burn creates may not look appetizing, freezer burned food is completely safe to eat.

After a long day of classes, you deserve as quality of a frozen dinner as possible. If the freezer-burned area of the food is small, you can cut it off before or after cooking to preserve the quality of your meal. However, the damage is extensive, consider tossing out the food. 

How To Prevent Freezer Burn

sweet, berry, blueberry
Jocelyn Hsu

The biggest challenge when it comes to frozen food is keeping it frozen on your way home from the store. When the frozen food you just bought starts to thaw, this can cause freezer burn.

One obvious way to prevent this early thawing is to purchase your frozens at stores nearest you so they get home faster. Another way is to keep a cooler full of ice in the car.

vegetable, pea, frozen peas, legume, broccoli, cabbage
Katherine Baker

Most frozen foods should maintain their quality in the freezer for six months to a year. If you find that your frozen foods are developing freezer burn sooner than that, there are some preventative measures. 

It is important that your food (especially meat) is properly wrapped or packaged. Try to seal up open boxes, or keep the food in freezer bags with the air squeezed out. If you’re using containers, it is important that they are labeled as freezer-safe.

Other Freezing Tips 

beer, tea, coffee, cake
Smita Jain

One freezing tip is to not freeze too many things at once. It’s best not to overload your freezer by making it do too much work at once. This can actually make your freezer warm up and cause freezer burn.

Another tip is to have an organization method. Put the foods that have been in the freezer the longest towards the top, and the newer foods at the bottom. Use a freezer log and label. 

Freezer burn is an existent oxymoron. Maybe think twice next time you see little ice crystals in that Lean Cuisine you bought way back at the beginning of the school year.


It is possible to have some ice crystal formation on items placed in the freezer. When items placed in the freezer are warmer than the freezer temperature or have condensation on them, the moisture can freeze and form ice crystals. To prevent excess ice crystal formation, use only freezer-safe containers and moisture-proof, vapor-proof freezer wrap. This wrap will help prevent moisture loss during the defrost cycle.

When the freezer defrosts (self-defrosting models only), the freezer air temperature will rise. To minimize the effect on food temperature, maintain a fully stocked freezer compartment but don’t overload the freezer. If foods lose any moisture during the defrost cycle, some ice crystals will form. When the defrost cycle ends, the freezer temperature will return to the normal set temperature, depending on the freezer control setting.  Control adjustments may be needed depending on environmental conditions.

Frost on food can also be caused if the door is left open for a period of time. This allows humidity to enter the freezer. Make sure the door is closing completely and is not blocked by something between the door gasket and cabinet.

Frequent door openings can let in humid room air. Keeping door openings to a minimum will help, but may not completely eliminate frost or ice in the freezer. During months of high humidity (especially if a home is not air-conditioned), it is normal to see some frost and sweating on the interior walls or on food packages.

An improper seal of the gaskets on the refrigerator or freezer doors could also cause humidity to form. Check the seal around the outside doors and the freezer door to make sure nothing is obstructing the gasket seal.

Temperature controls are preset at the factory to the “mid setting” which should be correct for normal household use. If your controls need to be adjusted, adjust the temperature one setting colder and wait 24 hours for the compartments to cool. Repeat this process until the desired temperature is reached. Refer to the “Owner’s Manual” for instruction on adjusting the temperature.

How to prevent frost or ice crystals on frozen food?


How to prevent frost or ice crystals on frozen food?

How to prevent frost or ice crystals on frozen food?

It is normal to see some frost or ice crystals especially on frozen food. This is caused by moisture inside the food itself or inside the freezer. see if one of the following will solve the problem.

Store food properly

Food placed inside the freezer is usually warmer than the appliance’s internal temperature. As the food cools, it is normal to see some condensation turning into frost or ice crystals on it. To avoid this, make sure to store food in sealed, freezer-safe and moisture-proof containers or wraps. 

Avoid opening the door too frequently or keeping it open for long

If the doors of the freezer are opened frequently or if they are not sealed properly, the warmer air from the outside will get into the appliance. This warm air turns to moisture when it comes into contact with the cooler temperatures and forms frost or ice crystals on food.

To avoid this, try not to open the door too much and don’t leave it open for too long. Make sure food or other items are not obstructing the doors from being closed. 

Check for gaps, cracks, or tears on the door seals 

In addition, check the door seals to see if there are any gaps between them and the cabinet. If you find any, adjust the door seal by gently pulling it away from the door using your fingers.

If the doors are not sealing properly, try cleaning the seal with a soft cloth or sponge and warm water. Avoid using abrasive cleaning products as they might damage the seals. If a seal is loose or cracked, it needs to be repaired or completely replaced. If you suspect this to be the case, contact an authorised service agent

What Causes Ice Crystals on Frozen Food?

Frozen vegetables


We’ve all cracked through a few layers of freezer burn to get to the tasty part of the ice cream carton (if ice cream even lasts that long in your freezer!). But even if you’ve chomped down a few ice crystals without consequence, you might still be wondering what caused that freezer burn in the first place or if large ice crystals on a frozen food item indicate that the food has undergone a transformation that will make it not so tasty. Learning more about what causes ice crystals on frozen food can help you prevent them and know when it’s safe to eat the food you’ve stored in your freezer.

Causes of Ice Crystals on Frozen Food

A few different factors contribute to ice crystals, or freezer burn, forming on the food you’ve stored in your freezer. When food is in the freezer, water molecules begin to escape from it. Put more simply, the food begins to lose moisture. As that happens, the oxidation process causes ice crystals to form on the surface of the food. Sometimes, depending on the food, you may also notice that it becomes slightly discolored near the crystals, as well.

Freezer burn is more likely to happen when food has been in the freezer for a long time or if it hasn’t been wrapped tightly.

Is It Safe to Eat?

Luckily for anyone who has thawed meat with a bit of freezer burn or accidentally eaten the crystals off the top of a pint of ice cream, ice crystals are perfectly safe to eat. However, you still want to avoid allowing those crystals to form because they could be an indication that your frozen food will have a taste that’s dull, dry or slightly off since it has begun to lose moisture.

Preventing Freezer Burn

Thankfully, there are ways to cut back on freezer burn. Here are some of the easiest:

  • Keep the Freezer Temperature Consistent: Allowing frequent changes in temperature within the freezer is a great way to speed up the freezer burn process. Maintain a consistent temperature on your dial (typically about zero degrees Fahrenheit) and try to minimize the amount of time that the freezer door is open.
  • Store Food Correctly: Food that’s dry and wrapped tightly will grow far less freezer burn than items that aren’t. Wrap food tightly with plastic wrap or in a thick plastic bag designed for freezer storage that you’ve released all of the air from. Then, put it in an airtight container that’s roughly the same size as the amount of food you’re storing, as extra space can lead to more ice crystals.
  • Freeze It Quickly: Many people who are concerned about bacteria growth may wonder if food being cooled must pass quickly through a certain temperature range to reduce pathogen growth. The answer is the range of 135 degrees Fahrenheit to as low as 41 degrees Fahrenheit in the span of six hours. This is more important in restaurants, where food tends to sit and cool for extended periods of time, but in general, allow food to get to room temperature and then put it in the freezer as opposed to letting it sit out in a cool room overnight. 
  • Label Food: In the same way that soup on a buffet should be labeled with the date it was made, you can also label the food you store in your freezer. If seafood gumbo was prepared on Thursday, make a small label to indicate that date. If you notice that you’re often letting food sit in the freezer for months, consider defrosting it and eating it or changing your meal prep habits to avoid letting food sit so long that it develops ice crystals.

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