A crock pot makes crisp sauerkraut when cabbage is salted at 2–2.5% by weight and kept under brine for 3–4 weeks.
You can make great kraut without a fancy crock. This sauerkraut recipe in crock pot uses the ceramic insert as a steady, easy-to-clean fermenting vessel. You’ll salt shredded cabbage, pack it tight until it makes its own brine, then keep every shred under the liquid while it turns tangy and crisp.
The payoff is simple: dependable texture, clean flavor, and a batch size you can scale to the crock you already own. If you’ve had jars dry out or float, the wide mouth of a slow cooker insert makes packing and weighting a whole lot easier.
| Shredded Cabbage Weight | Salt Amount | Suggested Crock Pot Insert Size |
|---|---|---|
| 1 lb (450 g) | 2 tsp (about 9 g) | 1.5–2 qt |
| 2 lb (900 g) | 4 tsp (about 18 g) | 2–3 qt |
| 3 lb (1.4 kg) | 2 Tbsp (about 27 g) | 3–4 qt |
| 4 lb (1.8 kg) | 2 Tbsp + 2 tsp (about 36 g) | 4 qt |
| 5 lb (2.3 kg) | 3 Tbsp + 1 tsp (about 45 g) | 4–5 qt |
| 6 lb (2.7 kg) | 4 Tbsp (about 54 g) | 6 qt |
| 8 lb (3.6 kg) | 5 Tbsp + 1 tsp (about 72 g) | 6–7 qt |
| 10 lb (4.5 kg) | 6 Tbsp + 2 tsp (about 90 g) | 8 qt |
Sauerkraut Recipe In Crock Pot Step By Step
Ingredients You’ll Use
- Green cabbage (as much as fits your table)
- Canning or pickling salt, or fine sea salt with no additives
- Optional: caraway seed, juniper berry, grated garlic, or thin-sliced apple
Gear That Makes The Batch Smooth
- Crock pot ceramic insert and its lid (don’t turn the cooker on)
- Kitchen scale (best for salt math)
- Large bowl, cutting board, and a sharp knife or mandoline
- Clean hands or a potato masher for pressing
- A weight: a smaller plate that fits inside, plus a clean jar filled with water
Salt Math That Keeps Kraut On Track
A solid target is 2 to 2.5% salt by weight of the shredded cabbage. That range lines up with classic sauerkraut standards that call for at least 2% salt during fermentation. If you want a trusted baseline recipe in larger batch sizes, see the NCHFP sauerkraut recipe from the University of Georgia.
Quick formula: weigh your shredded cabbage in grams, multiply by 0.0225, then weigh that many grams of salt. If you don’t have a scale, the table above keeps you close, yet weighing is the cleanest way to repeat results.
Step 1 Pick And Prep The Cabbage
Choose firm heads with tight leaves. Peel off limp outer leaves, then rinse and dry the rest. Slice the cabbage into quarters, cut out the core, then shred it into thin ribbons. Thin shreds pack better and ferment more evenly.
Step 2 Salt And Massage Until Brine Forms
Put a few handfuls of cabbage in a big bowl, sprinkle in some of the measured salt, then toss. Keep going until all the cabbage is salted. Now squeeze and rub the cabbage with clean hands for 5 to 10 minutes. You’re pushing water out of the leaves so the brine starts pooling in the bowl.
Step 3 Pack Tight In The Crock Pot Insert
Spoon the cabbage into the ceramic insert a bit at a time. After each scoop, press it down hard with your fist or a masher. The tighter you pack, the less trapped air you leave behind. When you finish, the brine should rise above the cabbage when you press down.
Step 4 Weight It So Nothing Floats
Place a small plate or a clean fermenting weight over the cabbage, then set a jar of water on top as a press. The goal is simple: all cabbage stays under brine. If the brine sits low, wait 30 minutes and press again. If it’s still low, mix 1 teaspoon of salt into 1 cup of water and add just enough to cover.
Step 5 Ferment At A Steady Temperature
Set the insert in a spot out of direct sun. Many home guides aim for 70–75°F for steady fermentation. At that range, kraut often finishes in 3 to 4 weeks. Cooler spots take longer. Warmer spots can soften texture. The USDA’s Safely Fermenting Food at Home handout is a handy reference for keeping the process clean.
Check the surface daily for the first week. You may see bubbles and hear a faint hiss when you lift the lid. That’s normal. Skim any foam with a clean spoon, then re-cover. Keep the plate and weight clean, too.
Try to peek with purpose now and then. Each lift of the lid lets air hit the surface, so keep checks quick. If cabbage bits cling to the rim, wipe them away with a towel dipped in salty water. A tray under the insert catches overflow and keeps the counter tidy. If you go away for a day, don’t sweat it—press the weight down when you’re back.
Step 6 Taste, Then Move It Cold
Start tasting after 10 days. Use a clean fork and push the cabbage down again after you sample. When the flavor is tangy enough for you, move the whole insert to the fridge for a day to slow fermentation, then pack the sauerkraut into clean jars. Press it down so brine covers the cabbage in the jar, cap, and refrigerate.
Making Sauerkraut In A Crock Pot With Steady Results
Why The Crock Pot Shape Helps
The wide, heavy insert holds temperature better than a thin jar. It also gives you room to press cabbage hard, which helps the brine rise fast. A snug lid cuts down on drying at the surface, so you’re less likely to fight floating shreds.
How Full To Fill The Insert
Leave 3 to 4 inches of headspace. Fermentation can foam and push brine up. If you pack to the rim, you’ll be wiping brine drips all week. If your insert is huge, don’t force a tiny batch in the bottom; a small batch can dry faster. Use a smaller insert or scale up the cabbage.
Flavor Add-Ins That Keep Texture
Plain kraut is hard to beat, yet small add-ins can nudge the flavor without changing the process. Keep extras light so cabbage still makes up most of the mix.
- Caraway seed: classic deli flavor
- Juniper berry: piney lift (crush a few first)
- Garlic: one clove grated into the bowl
- Apple: a few thin slices for a mild sweet note
Salt Choices That Don’t Cloud The Brine
Pickling salt is the easiest choice. Table salt can work, yet iodine and anti-caking agents may make brine look hazy. Flaky salts vary by brand, so weighing matters even more if you use them.
Signs The Ferment Is On Schedule
Day 1 to 3 often brings brine rise and bubbling. Week 1 may smell like fresh cabbage mixed with something sharp. Week 2 to 4 moves toward a clean, sour aroma. Texture stays crunchy when the cabbage stays submerged and the temperature stays steady.
Common Fixes When A Batch Acts Up
Most problems come from three things: too little salt, cabbage peeking above brine, or a spot that swings hot and cold. Use the table below as a quick check before you panic and dump the crock.
| What You See | What It Often Means | What To Do Next |
|---|---|---|
| White film on brine | Yeast on the surface | Skim it, wash the plate, keep cabbage under brine |
| Fuzzy green, blue, or black growth | Mold | Toss the batch if growth is widespread or smells off |
| Cabbage soft and limp | Too warm, too little salt, or weak packing | Keep cooler next time; hit 2–2.5% salt; press harder |
| Brine low after 12 hours | Dry cabbage or coarse shred | Press again; add a light saltwater brine to cover |
| Kraut too salty | Salt measured by volume, not weight | Rinse a serving right before eating; weigh next time |
| Kraut not sour after 3 weeks | Cool spot slowed fermentation | Give it more time; keep it in the low 70s°F if you can |
| Pink brine or slimy texture | Bad fermentation | Discard and reset with clean gear and fresh cabbage |
Storing And Serving Your Finished Kraut
Fridge Storage
Refrigerated sauerkraut keeps for months when brine covers it and jars stay clean. Use a clean fork each time. If brine drops below the cabbage, top it up with a pinch of salt stirred into water.
Freezer Storage
You can freeze kraut in freezer jars or bags. Leave headspace since liquid expands. Freezing softens texture a bit, so save frozen kraut for cooking.
Heat And Canning Notes
Heating changes crunch and can mute the bright tang. If you want shelf-stable jars, follow a tested canning method from a trusted source, and expect a softer bite. Don’t wing processing times.
A One-Page Crock Pot Kraut Checklist
- Weigh shredded cabbage.
- Weigh salt at 2–2.5% of cabbage weight.
- Massage until brine pools in the bowl.
- Pack hard in the crock pot insert, leaving headspace.
- Set a plate and weight so all cabbage stays under brine.
- Keep the insert in a steady spot, lid on, out of sun.
- Skim surface film, keep weights clean, and top up brine if needed.
- Taste after 10 days, then chill and jar when it hits your sweet spot.
If you’ve got cabbage in the crisper and a slow cooker on the shelf, you’re set. This sauerkraut recipe in crock pot is simple on purpose, and once you nail your salt and packing, you’ll get the same tangy crunch batch after batch.
