You can check out the video for visual instructions.First, ensure that all utensils and tools are clean (see FAQs) to avoid unwanted bacteria.Remove the outer leaves of the cabbage (save one), quarter the cabbage, and cut out the tough core.

Then, use a long, sharp knife (or mandoline) to shred the cabbage into very thin ribbons (about ⅛-inch = 3mm) and weigh the cabbage to see how much salt you'll need (see recipe notes for salt amount!).

Transfer the cabbage and salt to a large bowl and use clean hands to massage it for 5-10 minutes until it releases lots of liquid – the more liquid, the better (don't be gentle).It can make it quicker to massage if you let it sit for 10-15 minutes before massaging.

Pack the cabbage and its liquid into a large mason jar, using a pestle or similar tool to pack it down so it's fully submerged.Don't overfill the jar—the mixture will fizz and expand as it ferments.

If using, add the bay leaves, caraway seeds, and juniper berries to the cabbage mixture. Then, weigh down the cabbage with 1-2 stones (in a clean Ziplock) or fermentation weights to ensure the cabbage shreds remain fully submerged. A cut-out cabbage leaf circle placed beneath the weights can help keep the shreds in place.

Cover the jar with a clean cloth or plastic wrap secured with a rubber band (or use an airlock lid). Leave it to ferment in a cool, dark place (ideally 64–72°F / 18–22°C) for 2–3 weeks (see notes for different temperatures and fermentation times).It's important to 'burp' it daily to release gas, and press the cabbage to keep it submerged. If the liquid gets too low, top up with a 2% saltwater brine. If scum appears on top, skim it.

Once you're happy with the flavor (level of sourness), screw on the cap and refrigerate. I often continue fermenting it in the fridge for 2-3 weeks (to boost probiotics) before enjoying it.