
Fermenting sauerkraut in food-grade plastic bags is possible, but there are a few things to consider. Firstly, it is important to ensure that the plastic is food-safe and BPA-free to avoid any potential health risks, such as increased exposure to BPA or botulism. Some people prefer to use glass containers for fermentation to avoid these risks. Additionally, plastic bags may be more prone to leaking, and it can be challenging to keep shredded cabbage covered with brine without leakage. Reinforcing the seal of the bag is crucial to prevent contamination and spoilage. Some people use plastic bags as weights to keep their fermentations submerged during the process. Overall, while fermenting sauerkraut in food-grade plastic bags is an option, it is essential to carefully weigh the benefits against any potential drawbacks and take the necessary precautions to ensure a safe and successful fermentation process.
| Characteristics | Values |
|---|---|
| Can I make sauerkraut in a food-grade plastic bag? | Yes, it is possible to make sauerkraut in a food-grade plastic bag. |
| Fermentation containers | Food-grade plastic bags, glass containers, freezer bags, plastic tubs, plastic containers, plastic jars, plastic pails, earthenware crocks, stone crocks, mason jars, Ziplock bags |
| Pros of using plastic bags | Cheap, great for cold storage in the fridge as they stack easily, convenient, commonly used for ferments |
| Cons of using plastic bags | Risk of botulism, possible BPA exposure, potential leaks, mess, lack of aesthetic appeal, possible issues with seal and airlock, may not be suitable for shredded cabbage |
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What You'll Learn

Food-grade plastic bags are safe for fermentation
When fermenting vegetables, it is important to ensure that only food-grade plastics come into contact with the food. Non-food-grade plastic containers can be used if they are lined with a clean food-grade plastic bag. Freezer bags designed for packaging turkeys are suitable for use with 5-gallon containers.
It is important to note that most plastic containers do not have a true airtight seal, which can increase the risk of contamination. Therefore, it is recommended to reinforce the seal of the lid or use an alternative container with a better seal. Additionally, plastic containers may not be ideal for decoration or presentation purposes, as they lack the aesthetic appeal of glass containers.
Overall, food-grade plastic bags can be safely used for fermentation, especially when placed inside a bucket or container to ensure sanitation and reduce oxygen exposure. However, it is crucial to follow proper sanitization procedures and consider the potential limitations of plastic containers, such as their seals and aesthetic value.
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Ziplock bags are a popular choice
When fermenting with Ziplock bags, it is important to use a new bag that doesn't leak. You will also need to "burp" the bag regularly during the first week of fermentation. This process releases excess gas that builds up in the bag, which can cause it to leak or explode if not properly released.
While Ziplock bags are a convenient option, there are some potential drawbacks to consider. Plastic can increase the risk of botulism, although there is limited evidence to support this claim. Additionally, some people prefer to avoid the use of plastic due to concerns about BPA exposure.
Another option for fermenting sauerkraut is to use food-grade plastic containers or bags. These are considered safe for fermentation as long as they are BPA-free and designed for food storage. However, it is important to note that most plastic containers do not have a true airtight seal, which can lead to contamination issues.
Ultimately, the choice of container depends on personal preference and the specific needs of the fermentation project. Ziplock bags can be a convenient and accessible option for home cooks, but it is important to be mindful of potential risks and take the necessary precautions to ensure food safety.
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Plastic bags are convenient for weighing down ferments
Plastic bags can be a convenient tool for weighing down ferments such as sauerkraut. Firstly, it is important to ensure that any plastic used is food-grade and BPA-free. This is because the wrong type of plastic can increase the risk of botulism. Food-grade plastic bags are commonly used for ferments and can be purchased, or you can reuse bags that previously contained food, such as ziplock bags.
Using a plastic bag as a weight can be an effective method to keep cabbage submerged under water or brine during the fermentation process. One way to do this is to fill a large, clean plastic bag with 3 quarts of water and 4-and-a-half tablespoons of salt, seal the bag, and place it on top of the cabbage inside the fermentation container. It is important to ensure that the bag is properly sealed to avoid leaks.
Another method is to place the cabbage or other vegetables inside a plastic bag for fermentation. This can make it easier to ensure that the cabbage is fully covered with brine, without too much extra space in the bag. It is important to ""burp" the bag regularly to release built-up gases. This method may be more prone to leaking, so it is important to use a new, leak-proof bag and take care when handling.
Plastic bags can be a convenient option for weighing down ferments, but they may not be as aesthetically pleasing as other options such as glass jars. It is also important to consider the environmental impact of using plastic bags and dispose of them responsibly. Reusable options such as glass jars or food-grade plastic containers may be more sustainable in the long run.
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Plastic containers are also suitable for fermentation
Some people prefer to use glass containers for fermentation, as they are believed to be safer and more aesthetically pleasing. However, others argue that food-safe plastic is a great option for fermentation, especially if you are just starting. Plastic containers are also cheap and great for cold storage in a fridge because they stack easily.
If you are using a plastic container for fermentation, it is important to reinforce the seal of the lid to prevent contaminants from entering. You can do this by filling your tub with water and tipping it over to test the seal. Additionally, it is recommended to only use the container for fermentation and not for other food items, as the smell of kraut may linger.
Freezer bags, such as Ziploc bags, can also be used for fermentation. These bags can be filled with the cabbage and brine mixture, squeezed to remove air, sealed, and then frozen for 8-12 months. However, some people are concerned about the potential for leaking and the risk of increased botulism associated with plastic bags.
Overall, plastic containers and bags can be used for fermentation, but it is important to ensure they are food-safe, create a tight seal, and are used specifically for fermentation to prevent any potential issues.
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Glass containers are preferable to plastic for storage
Glass containers are preferable to plastic for storing food items such as sauerkraut due to several reasons. Firstly, glass is a non-toxic and non-porous material, meaning it does not absorb or release toxic chemicals or microscopic particles, ensuring food safety. Even BPA-free plastics can release toxic chemicals when heated or washed, which can be harmful to health. Glass containers are also heat-tolerant and can be safely used in microwaves, ovens, and dishwashers, whereas plastic containers should not be heated as they can melt and are challenging to clean thoroughly.
Glass containers are more durable and long-lasting compared to plastic, which tends to crack, melt, or discolour over time. Glass is also aesthetically pleasing, allowing you to showcase your sauerkraut in the pantry or on kitchen shelves. Glass containers are easier to clean due to their non-porous surface, preventing food particles from getting stuck and reducing the risk of bacterial growth. They are also environmentally friendly, being 100% recyclable, whereas plastic may not always be accepted for recycling.
However, glass containers have some disadvantages. They are more expensive, heavier, and not as stackable as plastic containers. Glass is also more fragile and may not be as child-friendly. Nonetheless, when it comes to food storage, glass containers are the safer and healthier option, especially for items like sauerkraut, which require fermentation and long-term storage.
While it is possible to ferment sauerkraut in food-safe plastic containers, glass containers are recommended for better food safety and to avoid issues with contaminants. Glass crocks designed for fermentation provide a more airtight seal, reducing the risk of outside air disturbing the fermentation process. Additionally, plastic containers can absorb strong smells, which may be undesirable for long-term storage of items like sauerkraut. Therefore, glass containers are the preferred choice for both the fermentation and storage of sauerkraut.
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Frequently asked questions
Yes, you can make sauerkraut in a food-grade plastic bag. However, you should ensure that it is a new bag that does not leak.
Food-grade plastic bags are cheap and great for cold storage in a fridge because they stack easily.
Some sources suggest that fermenting in plastic increases the risk of botulism. Additionally, most plastic containers do not have a true airtight seal or airlock, which can lead to issues with contaminants.
Glass containers, such as Mason jars, are often used for fermentation as they can help prevent contamination from insects and molds. Old-fashioned earthenware crocks are another traditional option that is still a good choice, as long as they are not cracked or chipped.
It is recommended to use disease-free, firm, sweet, and mature heads of cabbage from mid- and late-season crops.











































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