Red cabbage sauerkraut ferments exactly the same way as classic green cabbage sauerkraut — same salt ratio, same wild lactic acid bacteria, same process. The only real difference is what happens to the color along the way, which makes this version something of a kitchen science show.
The same glass fermentation weights (paid link) used for classic sauerkraut work perfectly here too — keeping the red cabbage submerged is what lets that pink color develop evenly.
Why It Turns Bright Pink
Red cabbage gets its color from anthocyanins, plant pigments that are highly sensitive to pH. As fermentation produces lactic acid and the brine becomes more acidic, the anthocyanins shift from dull purple toward a vivid pink or magenta. It’s a visible, harmless sign that fermentation is actively happening — not a warning sign.
Ingredients
- 1 medium head red cabbage (about 2 lbs / 900g)
- Fine sea salt, about 2% of the cabbage’s weight (see our salt calculator)
Step-by-Step
- Remove the outer leaves and thinly shred the cabbage.
- Weigh the shredded cabbage and calculate 2% of that weight in salt.
- Massage the salt into the cabbage for 5-10 minutes until it releases its own brine.
- Pack tightly into a jar, pressing out air pockets, and weigh it down under the brine.
- Ferment at room temperature for 1-4 weeks, tasting along the way — the color will deepen and brighten as it sours.
Red vs. Green Cabbage Sauerkraut
- Flavor: similar tang, though many people notice red cabbage kraut is slightly sweeter and a touch more peppery.
- Texture: red cabbage leaves are a bit sturdier, so it can stay crisp a little longer.
- Everything else — salt ratio, fermentation time, troubleshooting — is identical to our classic sauerkraut recipe.
FAQ
Is the bright pink color safe?
Yes — it’s simply the natural pigment reacting to the increasing acidity, the same reaction you’d see adding vinegar to red cabbage on a stove.
Can I mix red and green cabbage in the same jar?
Yes — this is a popular way to get a marbled pink-and-white kraut, and it ferments exactly the same way as either cabbage on its own.
Save this guide on Pinterest for your next batch.
Related: Classic Sauerkraut Recipe · Salt & Brine Calculator