The freezer can save families thousands — here’s how to use it properly

You’re standing in front of the freezer, fishing out a brownish lump in an opaque bag. No label. No date. Ground beef from last year? Stew from the year before? You weigh it in your hand, sniff the bag, and carefully put it back — at the back, where it came from. Sound familiar?

You’re not alone. A Danish consumer survey estimates that about half of households have “UFOs” in the freezer — unidentified frozen objects with no label or memory of where they came from [1]. The Norwegian pattern is even more striking: In a survey from Findus and Norstat, 75 percent of Norwegians say freezing leftovers is the best measure against food waste — but only 13 percent do it every time [2]. We know what works. We just don’t do it.

That’s a shame, because the freezer may be the home’s most underused tool against food waste. Norwegian households throw away an average of 35 kilos of food per person per year, with a total value of around 11 billion kroner [3]. A lot of that could have been saved — if the freezer was a system, not a postponement.

In this article, we look at what the research and the Norwegian Food Safety Authority actually say about freezing, which myths are costing you money, and a concrete 30-minute freezer audit that can give you dinner for a week without shopping.

The freezer is safe. It’s the quality that drops.

Let’s start with the most important thing: The Norwegian Food Safety Authority is crystal clear that you can “freeze almost all food before its use-by date and keep it safe for years” [4]. Food does not become dangerous in the freezer — it becomes boring. Flavor goes flat, texture gets dry, and especially fat and salt speed up quality loss because fat turns rancid at all temperatures, including -18 °C [5].

That means the freezer is very forgiving from a safety perspective, but impatient when it comes to cooking. The frozen pizza from 2023 is safe to eat — it will just taste like cardboard.

Here’s a rough table, based on Matprat and Matvett, of how long common foods keep their quality at -18 °C [5] [6]:

Remember: This is about quality, not safety. Fat is the freezer’s enemy. Lean food is the freezer’s superstar.

The expensive myth: “I’ll freeze it before it goes off tomorrow”

The most widespread misconception about the freezer is that it’s a lifeline for food that’s about to expire. It isn’t — and that’s an expensive mistake.

The Norwegian Food Safety Authority says directly that “to ensure the quality of food is as good as possible, freezing should happen as quickly as possible and before the use-by date” [4]. Matprat goes further: Food that has passed its use-by date should never be frozen to “save” it. Microorganisms simply go dormant in the freezer and wake up again as soon as the food thaws [5]. Several Norwegian newspapers have covered this, including a clear headline: “Advises people not to freeze the meat right before it goes out of date” [7].

The difference between the two date labels is simpler than many people think:

• “Use by” is on fresh meat, fish, and ready meals. This is about safety. Freeze before the date — not after.
• “Best before” is about quality. The food is usually fine long after the date. Use your senses: look, smell, taste.

For the freezer, that means: Freeze while the food is still at its best. The day before the date is not a rescue day — it’s a warning that your shopping routine may need a closer look.

Why does the freezer become a “mystery zone”?

The Norwegian Food Safety Authority points out that “forgotten in the fridge or somewhere else” is the single cause that explains most food waste [8]. The freezer amplifies the problem for three reasons:

Out of sight, out of mind. You don’t open the freezer every day. What’s at the bottom has been there a long time. Chest freezers and freezers without drawers are the worst — you have to physically empty them to see what’s inside.

No labels. Matprat recommends labeling everything with contents, date, and portion size [5]. In practice, most people do this inconsistently. And an opaque bag without a date is, by definition, a UFO.

Too-large portions. A whole casserole in one giant container often sits there because it’s too much for one meal and too much to deal with. The advice is consistent: split into 1- or 2-serving containers before freezing [6].

It’s also a systems problem. Package sizes are often designed for families, while more than 40 percent of Norwegian households consist of one person [9]. 800-gram packs of minced meat, whole chickens, and kilo bags of berries are too much — and the freezer ends up as a “I’ll probably use it someday” storage unit.

A 30-minute freezer audit

Set aside half an hour this week. You’ll need a shopping bag, freezer tape or a marker, and a little courage.

1. Take everything out. All of it. Put it on the kitchen table or in a cooler bag.
2. Sort into four piles: “Eat this week,” “Eat within a month,” “Safe, but quality uncertain,” “Throw away.”
3. Defrost and wipe it down while the freezer is empty. A frost layer of just 2 mm increases power use by around 20 percent [10]. Those minutes are well paid for.
4. Reorganize by category. One drawer or shelf for meat/fish, one for veggies/berries, one for bread, one for ready meals and leftovers.
5. Label everything you put back with contents, freezing date, and suggested “use by” date. Freezer tape and a marker are enough.
6. Create a “eat first” zone. A basket or shelf for the oldest or fattiest items. These are this week’s dinner candidates.
7. Write down what you have. On a note on the freezer door, or in an app you already use.

After half an hour, you’ll have an overview of what’s in there, a plan for what to eat first, and — for most people — surprisingly much dinner. Many discover four or five meals they’d forgotten they owned.

How to keep the freezer tidy afterward — five tips

The hard part isn’t cleaning out the freezer once. It’s avoiding another mystery three months from now. Research and expert consensus point to the same habits:

1. Label when you freeze, not later

If you decide to label it “later,” you never will. Write the contents + date on the bag before it goes in. It takes five seconds. It prevents a UFO.

2. Portion while freezing

Split casseroles, minced meat, and chicken into portions that fit your household. One serving for one. Two for a couple. Three for a family. The big pack isn’t cheap if it ends up sitting there because it’s too large to use.

3. Keep the list outside the freezer

A list of what’s inside — on paper, a whiteboard, or in an app — is worth its weight in gold. When you plan dinner, check the list, not the freezer. When you come home from the store, update the list before you put the item away.

In Famn, you can keep a freezer storage list shared in real time with the whole household. The barcode scanner adds items in seconds, and the app suggests a “use by” date based on category — so fatty fish gets three months while game gets twelve.

4. “First in, first out” — in practice

New items go in the back or at the bottom. Old items come forward. It’s the simplest rule in logistics, and the one people follow least at home. A quick trick: move at least one item forward every time you open the freezer.

5. Keep it about 75 percent full

A half-empty freezer uses more power than a full one, because air warms and cools faster than frozen food. At the same time, it shouldn’t be crammed full — you need to be able to see what’s there [10]. Roughly three-quarters full is the sweet spot.

The Norwegian special case: cabin, hunting, and summer berries

The freezer has a special role in Norwegian homes. It’s not just storage — it’s a seasonal archive.

The cabin freezer is its own risk. Many people have chest freezers in cold utility rooms or basements, and below 10 °C the coolant gets so thick that the compressor struggles. That’s one of the most common reasons cabin freezers fail — and the warranty won’t cover it. Choose a model with “frost protection” or “winter mode” if the freezer stands in an unheated room [11].

Game meat. Lean game is one of the few items where Norwegian sources agree: 12 months of quality, and up to 2–3 years vacuum-packed. But as Jeger.no points out: “A man’s memory lasts about 14 days.” Without good labeling — ideally with weight and cut type — the game meat is forgotten quickly, and the family picks “the easiest pack” instead of “the oldest.”

Summer berries and mushrooms. Berries are frozen washed or cleaned, and chanterelles are cooked without fat until the water has evaporated before freezing. Well packed berries can last up to five years — but with poor packaging they get “freezer taste” after two [12]. It’s often last year’s Hardanger berries that become the classic forgotten orange bag at the bottom.

What the freezer actually costs you

A freezer uses electricity every day, all year round. Fornybar Norge estimates that a standard freezer uses around 300 kWh per year, or about 330 kroner in electricity [13]. An old freezer can be two to three times higher. A 400-liter freezer in energy class D uses around 425 kWh per year; the same freezer in class A uses around 170 kWh. Over ten years, that comes to about 2,500 kroner in difference [14].

The conclusion is not that you should throw out the freezer. Quite the opposite: used properly, it saves you many times what it costs. But an old, half-empty, frosted-over freezer full of UFOs is one of the worst investments in the home. A full, tidy, labeled freezer is one of the best.

Live alone? Three extra tips

Small households waste more food per person than larger ones, partly because the packages are too big [3]. If you live alone, the freezer is especially important — and especially easy to mess up.

• Portion immediately after shopping. Cut the bread in half, split the minced meat into 100 g portions, and spread berries on a tray before bagging them.
• Choose smaller packs when possible — even if the price per kilo is higher. A cheap bulk pack is expensive if half of it ends up in the bin.
• Use reminders actively. When there’s no one else in the house noticing that something is nearing its “use by” date, the system has to do the work. Famn’s push notifications for expiry dates are made for exactly this.

Start this week

The research is clear: habits stick when you do one concrete thing at a time. Here’s how to do it:

1. Set aside 30 minutes this week for a freezer audit. Just once.
2. Pick one routine to introduce: labeling when freezing, or a physical “eat first” zone, or a shared list in an app.
3. Plan this week’s dinners around what the freezer offers. You’ll probably get far without buying more than bread and milk.

If you want a shared overview that the whole household can see at the same time, Famn can make it easier. The app brings storage lists, shopping lists, meal planning, and consumption insights into one place — and shares everything in real time with the people you live with. The barcode scanner and suggested “use by” dates make logging an item a matter of seconds, not minutes.

Your freezer is safe. It’s your memory that fails. Luckily, both can be helped with half an hour and a plan.

Sources

1. Matinfo. Avoid UFOs in the freezer — here’s how to get organized. Reference to a Danish consumer survey on unidentified frozen objects. matinfo.no
2. Findus / Norstat (November 2024). The freezer can help Norwegians save thousands every year. 75% say the freezer is the best measure against food waste; 13% freeze leftovers every time. mynewsdesk.com
3. NORSUS / Matvett (2024). Mapping report on food waste in Norwegian households 2023 — 35 kg per inhabitant, approx. 11 billion kroner per year. matvett.no
4. Norwegian Food Safety Authority. Advice for storing food and drink. Freezing temperature, date labeling, quality vs. safety. mattilsynet.no
5. Matprat. Storage in the freezer. Shelf-life table, rancidity of fat, freezing rules. matprat.no
6. Matvett. Use the freezer to save food. Recommendations on labeling, portioning, and freezing times. matvett.no
7. Avisa Oslo / Romerikes Blad. Advises people not to freeze the meat right before it goes out of date — don’t wait. op.no
8. Norwegian Food Safety Authority. What do we throw away in food waste, and why do we throw away food? “Forgotten in the fridge or pantry” as the main cause. mattilsynet.no
9. SSB (2024). Household size in Norway: 40.8% one-person households. ssb.no
10. Matprat. What happens to food in the freezer. Freezer burn, oxidation, frost, and energy use. matprat.no
11. KK.no. Is your chest freezer placed in the utility room? Risks of cold placement and “winter mode.” kk.no
12. NRK. Frozen food also gets bad. Expert comments from Britt Kåsin (OFG) and others on freezing times and freezer burn on berries. nrk.no
13. Fornybar Norge. Electricity guide — Freezer. 300 kWh and about 330 kroner per year for a standard freezer. fornybarnorge.no
14. Klikk. Energy labeling for appliances: How much do you save? Comparison of energy classes for 400-liter freezers. klikk.no