Freezer burn happens when air reaches the surface of frozen food and draws out moisture. It’s safe to eat but dry and tasteless in the affected spots. Prevent it by removing as much air as possible (vacuum sealing is the most effective way), keeping your freezer at 0°F (−18°C), freezing food quickly and using older items first.
What is freezer burn?
Freezer burn is dehydration and oxidation on the surface of frozen food. Ice crystals on the food’s surface turn directly into vapour (sublimation) and escape into the air around the food — especially when there’s air inside the packaging. The surface dries out, and exposed fats and pigments oxidise. You’ll see grayish-brown, leathery patches on meat, or frost and dry, shrivelled spots on vegetables and ice cream.
Is freezer-burned food safe to eat?
Yes. According to the USDA, freezer burn does not make food unsafe — it just makes it dry in spots. Cut away heavily freezer-burned areas before or after cooking. Severely affected food may not be worth eating for quality reasons, but it isn’t a food-safety problem as long as it was handled and frozen properly.
7 ways to prevent freezer burn
1. Remove the air
Air contact is the root cause, so the best defence is packaging with as little air as possible. Vacuum sealing removes far more air than pressing out a zip-top bag by hand and holds the plastic tight against the food. If you don’t have a sealer, use the water-displacement method: lower a zip-top bag into a bowl of water so the pressure pushes air out, then close it.
2. Keep the freezer at 0°F (−18°C)
Temperature swings cause ice to melt and refreeze, which accelerates moisture loss. Check with an appliance thermometer — freezer dials numbered 1–7 aren’t temperatures.
3. Freeze food quickly
Freeze in thin, flat packs on a tray in a single layer, then stack once solid. Fast freezing forms smaller ice crystals and less surface frost.
4. Cool cooked food first
Chill leftovers in the fridge before freezing. Warm food creates condensation and frost inside the package and warms nearby items.
5. Use the right packaging
Use bags rated for freezing. Pad sharp bones so they don’t puncture bags — a pinhole lets air in and freezer burn follows.
6. Don’t overpack or overfill
A packed-solid freezer circulates air poorly, while a near-empty one warms up quickly when opened. Aim for full but not crammed.
7. Rotate your stock
Even well-wrapped food slowly loses quality. Label everything with the date and use oldest items first — our Freezer Planner shows best-quality dates for each category.
Does vacuum sealing completely stop freezer burn?
A good vacuum seal dramatically reduces it, which is why vacuum-sealed meat and fish often keep their quality toward the longer end of recommended freezer times. But if the seal fails, the bag is punctured or the freezer temperature fluctuates, freezer burn can still occur. Check bags occasionally — a bag that’s gone loose has lost its vacuum.
Before sealing, make sure the bag mouth is dry and wrinkle-free, and use the double-seal option if your machine has one. A slow leak is the most common reason vacuum-sealed food gets freezer burn.
Recommended freezer times
These FoodSafety.gov times are for best quality at 0°F: steaks 6–12 months, chops 4–6 months, ground meat 3–4 months, chicken pieces 9 months, lean fish 6–8 months, fatty fish 2–3 months, soups and stews 2–3 months, blanched vegetables 8–12 months. See the full food storage guide.
Related guides
Frequently asked questions
What does freezer burn look like?
Grayish-brown, dry or leathery patches on meat; ice crystals and shrivelled, discoloured spots on vegetables, fruit and bread; and ice crystals on the surface of ice cream.
Can you reverse freezer burn?
No — the moisture is lost. Trim affected areas, and use mildly freezer-burned food in soups, stews, braises or sauces where texture matters less.
How long does it take for freezer burn to develop?
It depends on packaging and temperature. Poorly wrapped food can show freezer burn within weeks, while well-vacuum-sealed food kept at a steady 0°F typically resists it for many months.
