Brine

Brine is simply a solution of salt and water, and it is the medium that most vegetable ferments rely on to stay submerged and protected from air. In a brine ferment, vegetables such as whole cucumbers or cabbage wedges are covered by a premixed salt water solution, rather than relying on their own released liquid the way shredded sauerkraut does. Getting the concentration right matters more than getting the exact vegetable right.

Brine strength is usually expressed as a percentage, meaning grams of salt per total weight of water and salt combined. A weaker brine ferments faster and tastes milder, while a stronger brine slows fermentation and produces firmer, saltier results. Using filtered or dechlorinated water is generally recommended, since chlorine and chloramine in tap water can interfere with the bacteria doing the fermenting.

A frequent point of confusion is mixing up brine ferments with vinegar pickles, which are acidified quickly with vinegar rather than fermented over days or weeks. Another common issue is guessing at salt amounts instead of weighing, which leads to inconsistent batches. A kitchen scale and a simple salt to water ratio chart make it much easier to repeat a ferment you liked and adjust one that came out too salty or too bland.