Sauerkraut
How to Make Sauerkraut
at Home: A Beginner's
Complete Guide
Two ingredients. One jar. No cooking, no special equipment, and no previous experience required — just cabbage, salt, and time.
Sauerkraut is one of the oldest preserved foods on earth — made by nearly every culture that grows cabbage, from Germany and Poland to Korea and China, each with their own version and their own name for it. What all of them discovered independently is that cabbage, salt, and time produce something greater than any of the individual ingredients: a tangy, crunchy, complex, living food that keeps for months without refrigeration and gets better as it ages.
The technique is also one of the most accessible in all of food preservation. You need no special equipment, no vinegar, no heat, no canning knowledge. Just a head of cabbage, some salt, a jar, and a week or two of patience. If you've never fermented anything before, this is the best possible place to start.
We carry fresh cabbage from local Upstate South Carolina growers when it's in season — peak season in our area runs spring and fall. We also stock good non-iodised sea salt and the other simple pantry staples you'll need. Everything for a batch of excellent sauerkraut is available in one stop.
"Fermentation is the oldest form of food preservation — and one of the most forgiving. Salt, cabbage, and time. That's it. Everything else takes care of itself."
The BasicsWhat Is Sauerkraut and Why Make It at Home?
Sauerkraut is lacto-fermented cabbage — cabbage that has been salted and allowed to ferment through the action of naturally occurring bacteria. The salt creates conditions that favour lactobacillus bacteria (present naturally on the surface of all vegetables) while suppressing harmful organisms. The lactobacillus consumes the natural sugars in the cabbage and produces lactic acid, which gives sauerkraut its characteristic sour flavour and acts as a natural preservative.
No vinegar is involved. No heat. No special starter cultures. The bacteria needed are already on the cabbage — your job is simply to create the right conditions for them to do their work.
Store-bought sauerkraut from a jar or can has almost always been pasteurised, which destroys the living bacteria that make traditionally fermented sauerkraut nutritionally interesting. If you want real, traditionally fermented sauerkraut with its full character — the crunch, the depth of flavour, the living cultures — you either need to find a good refrigerated, unpasteurised brand or make it yourself. Making it yourself is cheaper, easier than you think, and considerably more satisfying.
Simple as It GetsThe Two Ingredients That Matter
🥬 Cabbage and Salt — That's All
- Green cabbage — the classic. Standard green cabbage is the traditional choice and produces the most reliable, familiar sauerkraut. Look for fresh, firm heads with tightly packed leaves and no signs of softness or browning. A medium head weighing around 1kg will fill one large mason jar. Red cabbage works equally well and produces a dramatically coloured, slightly earthier kraut.
- Non-iodised salt — this part is not negotiable. Use sea salt, kosher salt, or pickling salt — anything non-iodised. Iodised table salt contains iodine added to prevent thyroid deficiency, but iodine inhibits the beneficial bacteria needed for fermentation. This is the one rule you cannot skip. The quantity is 2% of the weight of your shredded cabbage: for 1kg of cabbage, use 20g of salt.
The 2% salt-to-cabbage ratio is the sweet spot developed over centuries of fermentation practice. Below 1.5%, the brine may not be protective enough against unwanted bacteria. Above 3%, fermentation slows significantly and the result can be unpleasantly salty. Use a kitchen scale for accurate measurement — it takes 30 seconds and makes a real difference to reliability, especially for your first batch.
What You'll NeedEquipment
🫙 The Equipment List
- A sharp knife or mandoline — for shredding the cabbage. A mandoline produces the most uniform shreds but a knife works well. Aim for shreds about 3–5mm thick — thin enough to release brine easily, thick enough to retain some crunch after fermentation.
- A large bowl — for massaging and combining the cabbage and salt before packing.
- A kitchen scale — for weighing the cabbage and calculating the correct salt amount. Strongly recommended.
- A clean glass jar — a wide-mouth 1-litre mason jar is ideal for a batch from one medium head of cabbage. Make sure it's very clean. Soap and hot water is fine; no need to sterilise.
- Something to weight the cabbage down — a small zip-lock bag filled with brine (1 tsp salt per cup of water), a smaller jar filled with water that fits inside the opening, or a dedicated fermentation weight if you have one. The goal is to keep the cabbage submerged below the brine.
- A cloth or loose lid — to cover the jar. The fermentation produces CO₂ which needs to escape. A piece of cloth secured with a rubber band, or a loosely placed lid (not sealed tight) both work well.
The Full ProcessMaking Sauerkraut, Step by Step
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5 minutes
Prep the Cabbage
Remove the tough outer leaves from the cabbage and set two or three aside — you'll use one later. Quarter the cabbage, cut out and discard the core, and shred into strips 3–5mm wide. A mandoline makes quick work of this; a sharp knife works fine. Weigh the shredded cabbage once you have it all prepared.
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Calculate 2%
Add the Salt
Calculate 2% of your cabbage weight in salt. For 1kg of cabbage: 20g salt. For 800g: 16g salt. Sprinkle the salt over the cabbage in your large bowl and toss briefly to distribute it evenly.
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10 minutes
Massage Until Brine Forms
This is the most satisfying step. Massage, squeeze, and scrunch the cabbage with both hands for a solid 10 minutes. The salt draws moisture out of the cabbage cells through osmosis, and within a few minutes you will see liquid pooling in the bowl. By the end of 10 minutes you should have a significant amount of brine — enough to eventually submerge the cabbage in the jar. If after 10 minutes you have very little brine, rest for 20 minutes and massage again.
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Firmly
Pack the Jar
Pack the cabbage into your clean jar in handfuls, pressing each layer down firmly with your fist or a wooden spoon before adding the next. The goal is to eliminate air pockets and force the brine to rise above the cabbage. Pour any brine remaining in the bowl into the jar. The cabbage should be submerged — or nearly so — beneath the brine.
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Essential
Weight It Down and Cover
Fold one of the reserved outer leaves and tuck it over the shredded cabbage as a natural barrier. Place your weight on top to keep everything submerged beneath the brine. If the brine doesn't cover the cabbage after packing, mix 1 teaspoon of non-iodised salt with 1 cup of water and add enough to submerge. Cover the jar loosely — not sealed — to allow CO₂ to escape.
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1–4 weeks
Ferment at Room Temperature
Place the jar somewhere at room temperature, out of direct sunlight. The ideal fermentation temperature is 18–22°C. Warmer temperatures ferment faster but produce a less complex flavour; cooler temperatures slow fermentation and develop more nuance. Press the cabbage down daily for the first few days to keep it submerged. You may see bubbles — this is CO₂ from the fermenting bacteria and is a sign everything is working correctly. Taste from day 5 onward.
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When it's right
Refrigerate and Enjoy
When the sauerkraut reaches the level of tanginess you enjoy — anywhere from gently sour at 5–7 days to robustly sour at 3–4 weeks — it's ready. Seal the jar with a proper lid and move it to the refrigerator. Cold dramatically slows fermentation. Your sauerkraut will keep for several months in the fridge and will continue to develop slowly even under refrigeration.
What's HappeningUnderstanding the Fermentation Process
What you're doing with salt and cabbage is creating conditions for lacto-fermentation — one of the oldest and most reliable preservation methods in human history. Here's what's actually happening in the jar.
🔬 The Science, Simply Explained
- Days 1–3 (Early fermentation): Various bacteria begin consuming the natural sugars in the cabbage. The environment is still relatively hospitable to a range of organisms. You may see vigorous bubbling — this is CO₂ being produced as a byproduct of fermentation. The cabbage begins to soften slightly and the brine may become cloudy. This is all normal.
- Days 3–7 (Lactobacillus takes over): As lactic acid accumulates, the environment becomes increasingly acidic. This acidity suppresses most bacteria except lactobacillus, which thrives in acidic conditions. The pH drops, the sour smell becomes more distinct and pleasant, and the protective environment strengthens. The cabbage is already safe to eat at this stage.
- Days 7–28 (Maturation): Fermentation continues at a slower pace. Flavour compounds develop and deepen. The texture settles into its final form — still with some crunch if you started with fresh, tightly packed cabbage. The lactic acid concentration continues to rise, further improving preservation. This is when the most interesting flavour development happens.
- The finished product: A properly fermented sauerkraut has a pH around 3.5 — significantly more acidic than most pathogens can tolerate. This is why traditionally made sauerkraut kept sailors healthy on months-long voyages and filled larders through Eastern European winters for centuries before refrigeration existed.
When Things Look OddTroubleshooting Common Issues
The most common "problem" in home fermentation is a white or grey film that forms on the surface of the brine. This is kahm yeast — a wild yeast that is harmless and very common, especially in warmer conditions or with lower salt percentages. Skim it off with a spoon when you see it, make sure the cabbage stays submerged, and carry on. It affects appearance but not safety or flavour significantly.
🛠️ Common Issues and Solutions
- Not enough brine after massaging. Rest the salted cabbage for 30–60 minutes and massage again. If still insufficient, make a 2% brine (1 tsp salt per cup water) and add enough to submerge. Never add plain water — it dilutes the salt concentration.
- Cabbage floating above the brine. This is the most important issue to address — exposed cabbage can develop mould. Press it back down and adjust your weight. A zip-lock bag filled with 2% brine and placed on top of the cabbage is one of the most effective weights for this purpose.
- Sauerkraut tastes too salty. It was either too much salt or too short a fermentation time. Longer fermentation reduces the perception of saltiness as more acid develops. Rinse lightly before eating if needed.
- Sauerkraut is very soft, not crunchy. Caused by fermentation at too high a temperature, or using old cabbage that was already losing moisture. Fresh, firm cabbage and a cooler fermentation spot (18–20°C) produces the crunchiest result.
- Coloured mould (pink, orange, black). Discard the batch. This is caused by contamination, usually from equipment that wasn't clean enough or from the cabbage being exposed to air for too long. Start fresh with cleaner equipment and better brine coverage.
Beyond PlainVariations and Flavour Ideas
Once you've made a plain batch and understand the process, variations are simple — just add flavourings at the packing stage.
🧄 Flavour Additions
- Caraway seeds — the classic German addition. Add 1–2 tsp per litre. Caraway's earthy, anise-adjacent flavour is deeply traditional and pairs beautifully with pork, sausages, and rye bread.
- Garlic — 2–4 cloves thinly sliced per litre. Produces a punchy, aromatic sauerkraut excellent with grilled meats and as a condiment.
- Juniper berries — 8–10 lightly crushed berries per litre. Adds a resinous, piney note that is deeply traditional in Alsatian and Central European cooking.
- Apple — one apple, cored and thinly sliced, added to the cabbage. The apple's natural sugars fuel a particularly active fermentation and add a subtle sweetness that balances the sour.
- Red cabbage with apple cider vinegar. Red cabbage ferments beautifully and produces a vivid purple-pink kraut. A tablespoon of raw apple cider vinegar added to the jar deepens the colour and adds complexity.
- Spicy kimchi-style. Add Korean red pepper flakes (gochugaru), ginger, and garlic to shredded cabbage for a simple, beginner-friendly take on kimchi-style fermented cabbage.
Putting It to WorkHow to Use Sauerkraut
🥪 Ways to Use Homemade Sauerkraut
- Hot dogs and sausages. The classic pairing. The acidity of sauerkraut cuts through the richness of a good sausage in a way that mustard alone cannot. This is why the combination has been a staple of German and Central European cuisine for centuries.
- Reuben sandwich. Corned beef or pastrami, sauerkraut, Swiss cheese, and Russian dressing on rye bread. One of the great American sandwiches — and it requires properly sour, crunchy sauerkraut to be made correctly.
- With pork. Braised pork shoulder or pork chops cooked low and slow with sauerkraut is a classic combination across German, Alsatian, and Eastern European cooking. The acid from the kraut tenderises the meat and the fat from the pork enriches the kraut — each makes the other better.
- As a condiment. A spoonful of sauerkraut alongside grilled meats, on a cheeseburger, or on top of avocado toast brings brightness and tang to anything that benefits from acidity.
- In grain bowls and salads. Sauerkraut works as a dressing replacement in grain bowls — its brine provides acid and salt, and the shreds add texture. Toss it with roasted vegetables, grains, and a drizzle of good olive oil.
- Straight from the jar. Once you've made a good batch, you'll find yourself eating it directly from the jar with a fork while you're cooking something else. This is perfectly normal and highly recommended.
If you want to enjoy the living, probiotic character of your homemade sauerkraut, add it to dishes at the end of cooking or serve it raw. High heat kills the lactobacillus bacteria. For dishes like braised pork where the kraut is cooked, use it freely — the flavour is excellent and it still brings plenty of benefit as a fermented food even without the live cultures. Save some raw on the side.
Your Questions, AnsweredFrequently Asked Questions
How long does sauerkraut take to ferment?
Sauerkraut is edible and pleasantly tangy in as little as 5–7 days at warm room temperature. Most people find the best balance of crunch and flavour between 2–4 weeks. Cooler temperatures slow fermentation and develop more complexity — a batch fermented for 4 weeks at 18°C will taste richer and more nuanced than one rushed at 24°C. Taste it regularly and refrigerate when it reaches your preferred level of sourness.
How do I know if my sauerkraut has gone bad?
Properly made sauerkraut is extremely safe due to its protective lactic acid environment. Signs of a problem: a foul, rotten smell (distinct from the normal sharp and pleasantly sour smell), mushy texture throughout, or coloured mould — pink, orange, or black. White or grey film on the brine surface is usually kahm yeast, which is harmless — skim and continue. When in doubt, trust your nose: well-fermented sauerkraut smells clean, sour, and appetising.
Why do you use non-iodised salt for sauerkraut?
Iodine, added to table salt to prevent deficiency, can inhibit or disrupt the beneficial lactobacillus bacteria that drive fermentation. Non-iodised salt — sea salt, kosher salt, or pickling salt — allows the naturally present bacteria on the cabbage to thrive undisturbed. This is the one non-negotiable rule in sauerkraut making.
Do I need special equipment to make sauerkraut?
No. A knife, a large bowl, a clean glass jar, and something to weight the cabbage down is all you need. A kitchen scale for accurate salt measurement is strongly recommended. Specialist fermentation crocks are enjoyable to use but entirely optional — a mason jar works perfectly for home batches.
How long does homemade sauerkraut last in the fridge?
Refrigerated sauerkraut keeps for several months — often 3–6 months or longer. The acidity that makes it safe also makes it naturally shelf-stable under refrigeration. It continues to ferment slowly in the fridge, becoming more sour over time. Keep it submerged in its brine and it will stay in good condition for a very long time.
Is homemade sauerkraut better than store-bought?
For traditionally fermented, living sauerkraut — yes, significantly. Almost all commercially packaged sauerkraut in jars and cans is pasteurised, which kills the live bacteria and produces a softer, less complex product. Refrigerated, unpasteurised brands are the exception. Homemade sauerkraut made with fresh cabbage and the right salt ratio is crunchy, complex, and alive — genuinely different from most of what's available commercially.