Brine

Brine is Salt in water. In a ferment, the water often comes from the food itself: salt draws juice, and that juice becomes the liquid the cabbage or cucumber has to stay under. NCHFP’s sauerkraut method packs salted cabbage until juice covers it; if it does not, they add a boiled and cooled brine of 1-1/2 tablespoons of salt per quart of water ¹. That covering-brine figure is not a license to invent a different salt level for the cabbage itself.

Salt selects microbes #

In fermented sauerkraut and brined pickles, salt is not a seasoning you can “cut for health” while keeping the same process. NCHFP: salt favors desirable bacteria and inhibits others; do not attempt those ferments by cutting back the salt required ². Fresh-pack pickles are different: vinegar acidifies them quickly, and tested reduced-salt formulas exist, with a warning that texture and flavor will change ². See Fermented pickles versus Quick pickle.

Use canning or pickling salt. NCHFP: noncaking material in other salts can cloud brine; flake salt varies in density and is not recommended for pickled and fermented foods ².

What to notice #

The food must stay under liquid. Exposed cabbage or cucumber dries, molds, or darkens — a covering failure, not a flavor choice. Look for a clean sour smell as Lacto-fermentation proceeds; a rotting smell is a different population. Taste salt in the liquid and in the vegetable separately; they equalize over time.

Cheese also uses brine as a salting stage rather than a vegetable ferment; that job is Salting cheese. A preserving brine is a liquid system for salt, acid, and water. The 25-pound cabbage formula for Sauerkraut belongs to vegetable fermentation, not to every brine. See Pickling and Preserving.