Is it Safe to Sous Vide in Any Plastic Bag? (2024)

Learn what health experts have to say about this popular cooking technique.

By

Marge Perry

Is it Safe to Sous Vide in Any Plastic Bag? (1)

Marge Perry has been writing and broadcasting about food, nutrition, and cooking for more than 25 years. Her award-winning work appears in many of the largest national magazines and newspapers and over 20 cookbooks. Her passion is further highlighted in her Allrecipes column, Food for Thought.

Updated on May 14, 2021

Is it Safe to Sous Vide in Any Plastic Bag? (2)

The first time I saw boil-in-a-bag rice, I was horrified — and also a little dumbfounded. I couldn't understand how the plastic wouldn't melt when boiled. And even if it didn't melt, wouldn't it leech chemicals into my food?

Years later in culinary school, we learned to sous vide — essentially, to cook (but not boil) food in plastic bags. Sous vide is a very old cooking technique that literally translates to "under vacuum." The idea is that when you put food in a vacuum-sealed plastic bag and submerge it in water heated to a specific temperature (generally under 190 degrees Fahrenheit), it cooks incredibly gently and evenly, and retains more moisture. Chefs love that they can sous vide well in advance, and finish the dish right before serving: sous vide food is nearly impossible to overcook.

Okay, I'm sold. It's the best ever stress-free way to cook for a party. But will any old plastic bag do or do we need very special, heavy duty bags to prevent the plastic's chemicals from transferring to our food?

To find out, I turned to one of my favorite food safety experts, Dr. Don Schaffner. I know the good doctor from Rutgers — who has served on the US National Academy of Sciences, World Health Organization, and the Food and Agriculture Organization (FAO) — will always err on the side of being more protective of our health. He's a very careful guy. Here's what he had to say.

"There are risks for cooking sous vide, but I don't consider using zip lock bags high on the list of what those risks are." From a microbiological perspective, said Dr. Schaffner, the key to safety of sous vide cooked food is getting the cooking time and temperature right.

Now, Dr. Schaffner wouldn't approve of just any old plastic bag. Inexpensive, flimsy zip top bags may contain BPA and phthalates, substances which act as "hormone disrupters" that can transfer to our food when heated in the microwave. They may also contain polyvinyl chloride (PVC) which can leech into foods — especially fatty foods like cheese, and meats. (That's why we were warned several years ago to not rest plastic wrap directly on food when microwaving.)

Look for bags made from high-density or low-density polyethylene and/or polypropylene. They can't be boiled, but are food safe (and won't melt) up to about 195F. (You wouldn't sous vide at that high a temperature anyway.) Ziplock and Glad brand bags are made from polyethylene plastic, and are free of BPAs and dioxins. A good rule of thumb is that when a bag is rated as microwave safe (which requires FDA approval) you can use it for sous vide. Even Dr. Schaffner agrees.

Related Content:

  • 5 Reasons You Need to Try Sous Vide Cooking
  • Drinking Bottled Water? You're Ingesting a LOT of Microscopic Plastic
  • Our Best Sous Vide Recipes

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Is it Safe to Sous Vide in Any Plastic Bag? (2024)

FAQs

Is it Safe to Sous Vide in Any Plastic Bag? ›

Sous vide manufacturer ChefSteps recommends using food-grade vacuum sealing bags because they're BPA-free and made of polyethylene (we like the ones made by FoodSaver). These bags need to be sealed with a vacuum-sealing system, which FoodSaver also makes.

Are all plastic bags safe for sous vide? ›

Ziplock and Glad brand bags are made from polyethylene plastic, and are free of BPAs and dioxins. A good rule of thumb is that when a bag is rated as microwave safe (which requires FDA approval) you can use it for sous vide. Even Dr. Schaffner agrees.

Can I use regular FoodSaver bags for sous vide? ›

Unlike other bags, FoodSaver® Bags can be simmered in water (for sous vide cooking) or microwaved (so you can reheat leftovers or pre-cooked dinners).

What is the alternative to plastic bags in sous vide? ›

Designed with the environment in mind, The Anova Precision® Reusable Silicone Bags are a durable, reusable alternative to single-use plastic.

Is it safe to sous vide in plastic container? ›

You can use some plastic containers for sous vide. Do NOT use basic food storage containers for sous vide, even if they are very large. The plastic will warp or melt at higher temperatures. The keyword is “polycarbonate,” which signifies a durable, heat-resistant plastic that will last for years.

Do plastic chemicals leach into food from sous vide sv cooking? ›

What about the plastic bags used for cooking do they pose any risks? No. The bags sold for sous vide cooking are free of phthalates , BPA , and other hormone-disrupting chemicals.

Are Ziploc bags sous vide? ›

Food-safe zipper bags work great for sous vide. I'm known to go the cheap route whenever possible, so while learning to cook sous vide I used Ziploc bags instead of vacuum sealed bags. I have never had a problem with them. They didn't melt, burn or make me sick.

Can you sous vide without vacuum sealed bags? ›

No, vacuum sealing is not necessary for sous vide. In fact — and this isverycounterintuitive — foods inside a sealed vacuum bag aren'tunder vacuumat all! A vacuum is defined as a space that contains little to no air [or matter, generally speaking].

Do sous vide bags need to be fully submerged? ›

With sous vide cooking, it's absolutely vital that your bags stay submerged and that trapped air bubbles are pushed to the top of the bag and away from the food. This is the only way to guarantee that your food is heating properly, which is important for both food safety and quality.

Can I sous vide in supermarket packaging? ›

Yes, IF the packaging is vacuum sealed similar to what you may see in frozen fish or meats. Does food have to be vacuum sealed to be safely cooked in a Sous Vide? The vacuum isn't about safety. It's about even cooking.

Can you sous vide in aluminum foil? ›

Sous Vide Tips

To prevent water from evaporating too much, use aluminium foil or a lid to cover as much of the pot as possible during cooking. Pat ingredients dry after sous vide and before searing; this encourages better browning. Sous vide is also a great tool for entertaining because it's easily scalable.

Can the plastic bag touch the sous vide? ›

To prevent cold spots on the food, make sure the bag isn't touching the sous vide machine or cooking vessel. If cooking with multiple bags, make sure they aren't pressing up against each other.

Is it safe to sous vide in silicone bags? ›

You can sous vide in a vacuum sealed bag, a reusable silicone bag, or a jar. Most sous vide bags sold are plastic, but we're partial to food grade platinum silicone Stasher bags because they are reusable, plastic-free, and BPA-free.

What is the healthiest bag for sous vide? ›

Sous vide manufacturer ChefSteps recommends using food-grade vacuum sealing bags because they're BPA-free and made of polyethylene (we like the ones made by FoodSaver). These bags need to be sealed with a vacuum-sealing system, which FoodSaver also makes.

Is Saran Wrap safe for sous vide? ›

Saran Wrap

It should work for sous vide cooking for short amounts of time.

Can I use a Rubbermaid container for sous vide? ›

The Rubbermaid container is about 11" (28cm) square and 8" (20cm) deep which is almost the perfect size for sous vide cooking meals for 4 to 5 people.

Does a sous vide container need to be BPA free? ›

How About Sous Vide? Of course, one of the most common concerns about sous vide cooking is the use of plastics (at heat), however the main thing to remember here is that you should always be using BPA-Free bags and pouches.

At what temperature does plastic leach into food? ›

Polyethylene Terephthalate (PET)

When exposed to high temperatures, food-safe PET can leach the contaminant, antimony, into your foods. On the other hand, cold foods such as salads and wraps can be packaged and stored into PET containers. PET Temperature Limits: Up to 120°F.

Do sous vide bags need to be airtight? ›

The key is that you don't want air between your food and the bag, because it won't conduct the heat from the water. So if you can't make a vacuum, the thing to do is use a zip lock and slowly submerge your bag into a pot of water, or into the sous-vide container.

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