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Modernist Food | Fermented

Welcome

Welcome to a technical resource for fermentation and preservation at the highest level of craft — pickles, lacto-ferments, sauerkraut and kimchi, kombucha and vinegar, miso and koji, hot sauce, curing and drying, and safe home canning. This documentation treats controlled spoilage as a discipline: every claim is anchored to a salt percentage, a temperature, or a pH, not a feeling.

This is the Fermented leaf of the Modernist Food family, beside Frozen (frozen-dessert science) and Pair (the flavor-pairing graph). Where Frozen is built on sugar physics and Pair on aroma chemistry, Fermented is built on salt, acid, and microbial succession.

Understand the Science

Why salt selects for the right microbes, how lactic acid drives pH down, and what the 4.6 line means for safety.

Master the Methods

Brine-submerged lacto-ferments, dry-salt kraut, kimchi paste, kombucha, vinegar, koji, fermented hot sauce, curing, and acidified canning.

Calculate with Confidence

Interactive tools for equilibrium brine, salinity, fermentation timing, and pH/acidity safety. See Calculators.

Preserve Safely

The pH 4.6 botulism line, acidification, mold-vs-kahm triage, and a clear in-scope vs refer-out boundary.

The quantitative spine

Section titled “The quantitative spine”

Throughout this site you’ll work in four numbers:

  • Salt % — always by weight, never by volume
  • pH — the acidity that decides safety (4.6 is the line)
  • TA — titratable acidity (% lactic or acetic), the flavor/finish target
  • a_w — water activity, for curing and drying

Where to start

Section titled “Where to start”
  1. Read How to Use This Guide for navigation and conventions
  2. Read Safety First — the non-negotiables
  3. Try the Brine & Salinity calculator to design your first ferment