Ground pork and fat, salted, cased and hung until it loses a third of its weight. The white bloom on the outside is a deliberate mould culture doing a job, not a fault, and scraping it all off is a small vandalism.
Coarsely or finely ground lean pork with 20-30% back fat, seasoned, packed into a natural or collagen casing and hung to ferment and dry for four to twelve weeks depending on diameter. The white or grey powdery coating is Penicillium nalgiovense, applied deliberately, which outcompetes unwanted moulds, regulates moisture loss through the casing and contributes flavour. Regional versions differ mainly in grind, seasoning and diameter: French saucisson is usually coarse with pepper and sometimes garlic, Italian soppressata is pressed flatter, Spanish chorizo seco carries pimentón.
Two safety mechanisms working together. Fermentation by lactic acid bacteria — from a starter culture or the environment — converts sugars to lactic acid and drops pH below roughly 5.3 in the first days, which stops pathogens while the sausage is still wet. Then drying takes water activity below the threshold for bacterial growth, measured as weight loss of 30-40%. Nitrate, as cure #2, is used because it converts slowly to nitrite over weeks and so remains protective through a long cure, unlike the faster-acting nitrite in cure #1. The mould coating regulates the drying rate so the outside doesn't harden into a shell that traps moisture inside.
It's finished and nothing improves it. The only variable is thickness.
HowSliced thin at an angle for a coarse-grained saucisson, thinner still for a fine one. Room temperature for twenty minutes before serving.
It renders fat and adds cured savour and, in the Spanish versions, pimentón, without needing to be cooked through.
HowDiced small and rendered from a cold pan, or added late to beans, lentils or a rice dish where it seasons the liquid.
It's the standard entry into fermented charcuterie, and the equipment is a scale, a culture and somewhere cool and humid.
HowLean pork and back fat at roughly 75:25, ground cold, mixed with 2.5-3% salt, 0.25% cure #2, dextrose and a starter culture. Stuffed, fermented at 70-75°F for 48-72 hours, then dried at 55-60°F and 70-75% humidity to 35% weight loss.
It's fat, salt and acid, so it wants something sharp and something plain alongside.
HowCornichons, mustard, bread and a sharp cheese. That's the whole tradition and it exists because it works.
The white bloom is Penicillium nalgiovense, deliberately applied, and it's doing real work — it outcompetes harmful moulds, moderates the rate of moisture loss so the sausage dries evenly, and contributes to the flavour. Scraping it off entirely removes part of what you paid for, and it's edible. Peel the casing back from the portion you're cutting if you prefer, and leave the rest intact. The second error is treating it like fresh meat. Dry-cured sausage is shelf-stable by design and is better at cool room temperature or in a cellar than in a cold fridge, which dries it out unevenly and mutes the flavour. Hang it or keep it wrapped loosely in paper somewhere cool.
Should feel firm with a slight give, not rock hard — over-dried saucisson is chalky. The white bloom should be even and powdery; fuzzy green, black or slimy patches mean it was stored badly. Look at the cut face: fat should be white and distinct, not yellowed or smeared. Coarse grinds generally have more character than fine. French saucisson sec, Italian soppressata and Spanish chorizo seco are all the same category with different seasoning. It keeps for weeks hanging in a cool place and improves slightly as it continues to dry. Two ounces per person on a board.
Doneness: Serve at cool room temperature. Store hanging or loosely wrapped in paper at 50-60°F rather than in a sealed bag in the fridge, which makes it sweat. If curing your own, ferment at 70-75°F then dry at 55-60°F and 70-75% humidity to 35% weight loss.
Yes, and it's there on purpose. It's Penicillium nalgiovense, the same genus used on Brie, applied by the producer to colonise the surface before anything unwanted can. It regulates drying and adds flavour. What's not fine is fuzzy green or black growth or a slimy grey film, which indicate poor storage — those should be wiped with vinegar or the sausage discarded depending on extent.
Two barriers. Fermentation drops the pH below about 5.3 within the first few days, which stops pathogens while the sausage is still moist. Then drying removes 30-40% of the weight as water, taking water activity below what bacteria need. Nitrate provides a third barrier against botulism. All three are measurable, which is why serious home curing uses a scale and a pH meter rather than judgement.
Yes, and it's the standard first fermented project — but unlike a whole-muscle cure, ground and stuffed products carry real botulism risk if the numbers are wrong, because the interior is anaerobic. Use cure #2 at 0.25% by weight, a commercial starter culture rather than wild fermentation, weigh everything, and track weight loss to 35%. A wine fridge with a humidity source works. Do not improvise the cure percentages.