Cabbage, salt and patience. Everything you need to make your first successful ferment — and how to know it's going right.
Lacto-fermentation is one of the oldest food preservation methods we have, and sauerkraut is the friendliest entry point. Salt creates a selective environment where lactic acid bacteria already living on the cabbage thrive while spoilage organisms don't.
The single rule that determines success: keep everything under the brine. Vegetables exposed to air are where surface yeast and mould appear. A weight, a folded leaf, or a small brine-filled bag all work.
Expect cloudy brine and lively bubbling around day three — both are signs of a healthy ferment. A clean sour smell is good; anything genuinely putrid means start again.
Recipe card
How to Make It
Ingredients
- 1 medium white cabbage (about 1 kg)
- 18 g fine sea salt (2% of cabbage weight)
- 1 tsp caraway seeds (optional)
Method
- 1Remove and reserve two outer leaves. Shred the rest finely.
- 2Weigh the shredded cabbage and add 2% of that weight in salt.
- 3Massage for 8-10 minutes until a good pool of brine forms.
- 4Pack tightly into a clean jar, pressing until brine covers the cabbage.
- 5Fold the reserved leaves on top as a cap and weigh down.
- 6Ferment at 18-20°C, burping daily, and taste from day 7.
Key takeaways
- 2% salt by weight is the reliable ratio.
- Under the brine, out of trouble.
- Refrigerate once the sourness is where you like it.
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