Garum (Salt to Protein Weight)

100% (baseline)

Whole fish or protein — Oily, enzyme-rich fish (anchovies, mackerel, sardines, sprats) ferment fastest; leaner proteins require longer or added koji enzymes

15–18% of protein weight

Non-iodized salt — Coarse sea salt or pickling salt; iodized salt suppresses both autolytic enzymes and halophilic fermentation bacteria

0 (optional: small amount for submerging whole fish)

Water — Traditional garum uses no added water; the fish releases its own liquid; some modern recipes add water if using lean proteins with little intrinsic moisture

Weigh your protein. Calculate salt at 15–18% of its weight. Combine salt and fish (whole, guts intact for maximum enzyme contribution, or ground for faster surface area) in a sterilized container. For traditional garum: pack into an earthenware vessel, weight to keep protein submerged beneath its own liquid as it releases, cover loosely, and ferment at 25–35 °C for 3–6 months, stirring occasionally. For modern accelerated garum (Noma method): combine ground protein, 15% salt, and an equal weight of rice koji (for additional enzymes) in a vacuum bag or sealed container; ferment at 60 °C in a dehydrator or temperature-controlled bath for 8–12 weeks, checking pH (target below 4.5 before straining). Strain through a fine-mesh sieve lined with cheesecloth. The amber-to-brown liquid is the garum; press the solids (pâte) separately — it is a concentrated paste condiment in its own right.

• Keep the protein fully submerged below its own liquid at all times — aerobic surface exposure encourages off-putting surface molds rather than halophilic LAB.
• At the traditional 25–35 °C, expect 3–6 months; at 60 °C (accelerated method) 8–12 weeks. The trade-off: lower temperature produces more nuanced, layered flavor; higher temperature is faster but the flavor is somewhat more one-dimensional.
• pH monitoring is essential for modern garum safety: once pH drops below 4.5, the acidic environment is self-preserving. Traditional garum relies on salt as the primary protection rather than pH.
• Adding rice koji (30–50% of protein weight) dramatically accelerates proteolysis in lean proteins that lack abundant autolytic enzymes — essential for beef, poultry, and insect garums.
• Filter first through a coarse strainer, then through cheesecloth, and finally optionally through a coffee filter for a crystal-clear liquid if appearance matters.
• Finished garum keeps indefinitely refrigerated due to its high salt content, low pH, and complete absence of surviving spoilage organisms.
• Use sparingly — even a few milliliters in a sauce, braise, or vinaigrette adds deep background umami without the fishy aroma of too much fish sauce.

• Colatura di alici (Italian)

  Anchovy garum from Cetara; 20–25% salt for extended maturation (up to 3 years); strained through a traditional terzigno barrel; higher salt, longer time, extreme complexity

• Nuoc mam / Nam pla (Southeast Asian fish sauce)

  Commercial equivalent; typically 20–25% salt, 12–18 months in outdoor vats; anchovy-based in Vietnam, mackerel or anchovy in Thailand

• Modern beef garum (Noma)

  15% salt + equal weight koji added to ground beef; 60 °C for 8–10 weeks; deeply savory, bloody-sweet aroma; koji enzymes compensate for beef's lower autolytic enzyme content

• Chicken wing garum

  Lean protein requires koji supplementation; 15% salt + 30–50% koji by protein weight; ferments well at 60 °C in 6–8 weeks; mild, roasted-umami flavor

• Grasshopper garum (Noma)

  Insect-based; 15% salt + koji; 60 °C; ~4 weeks due to high autolytic enzyme content; strong umami with nutty, mushroomy notes

• Garum allec (fish paste byproduct)

  The pressed solids after straining; used in ancient Rome as a cheaper, paste-form condiment; analogous to shrimp paste or prahok in Southeast Asia

• Shio Koji (Salt to Koji Weight)

  Enzyme-driven condiment using the same enzyme-assist approach as modern koji garum, but at shorter timescales

• Miso (Koji to Soybean Ratio)

  Parallel tradition: mold-enzyme-driven protein breakdown, but plant-protein base and paste rather than liquid form

• Kimchi Paste Ratio

  LAB fermentation with saeujeot (fermented shrimp) drawing on the same salt-to-protein preservation logic as garum

1. 1.The Noma Guide to Fermentation — René Redzepi & David Zilber (Artisan, 2018)
2. 2.Koji Alchemy — Jeremy Umansky & Rich Shih (Chelsea Green, 2020)
3. 3.The Art of Fermentation — Sandor Ellix Katz (Chelsea Green, 2012)
4. 4.Around the Roman Table — Patrick Faas (University of Chicago Press, 2003)
5. 5.Fish Sauce: A Global Pantry Essential — Harold McGee, On Food and Cooking (Scribner, 2004)

Confidence: high