Fumage is the French discipline of smoking foods — both à chaud (hot smoking) and à froid (cold smoking) — a preservation and flavoring technique that relies on the antimicrobial and antioxidant properties of wood smoke compounds, principally phenols, carbonyls, and organic acids. The distinction between the two methods is temperature: cold smoking operates at 15-25°C (59-77°F), which flavors and preserves without cooking the protein, while hot smoking at 65-85°C (149-185°F) simultaneously cooks and smokes. All products to be smoked must first be cured in salt — either dry-cured or brined — as smoking alone does not reduce water activity sufficiently for safe preservation. For cold smoking, the product is placed in a chamber separated from the smoke source, allowing the smoke to cool before contact. The duration ranges from 6 to 48 hours depending on the product: saucisson sec may receive 6-8 hours, while saumon fumé (smoked salmon) requires 12-24 hours at 20-22°C. The wood choice is critical: hêtre (beech, Fagus sylvatica) is the classical French standard, producing a mild, clean smoke; chêne (oak, Quercus robur) imparts deeper, tannic notes; bois de pommier (apple, Malus domestica) offers a delicate sweetness. Resinous woods — pine, spruce, cedar — are strictly avoided, as their terpene-rich smoke deposits bitter, acrid compounds. For hot smoking, the product is placed closer to the smoldering wood; trout (Salmo trutta), duck breast, and pork belly are common candidates, smoked at 70-80°C for 2-4 hours until the internal temperature reaches 63-68°C. The pellicle — a tacky, dried protein film formed on the surface during a 2-4 hour air-dry before smoking — is essential for smoke adhesion. Without it, smoke compounds bead and slide off, producing uneven color and flavor. Fumage is always the final step in a sequence that begins with curing.
{"Always cure before smoking — smoking alone is insufficient for safe preservation","Cold smoke at 15-25°C for flavor without cooking; hot smoke at 65-85°C to cook and flavor simultaneously","Form a pellicle by air-drying the cured product for 2-4 hours before smoking for optimal smoke adhesion","Select hardwoods only — beech, oak, apple, cherry — and strictly avoid resinous softwoods","Control airflow in the smoking chamber to prevent creosote buildup and ensure even smoke distribution"}
{"For saumon fumé, cure the fillet in 50 g salt and 25 g sugar per kg for 12 hours, rinse, form pellicle, then cold smoke over beech for 16-20 hours","A small pan of ice placed in the smoking chamber helps maintain cold-smoke temperatures on warm days","Monitor chamber temperature with a remote probe — fluctuations of even 5°C can shift cold smoking into the danger zone","Sawdust produces a slower, cooler smolder than chips, making it preferable for cold smoking applications"}
{"Smoking uncured product, which is unsafe as smoke alone does not adequately reduce microbial risk","Skipping pellicle formation, causing uneven smoke deposition and blotchy color","Using resinous woods that deposit bitter terpene compounds on the product surface","Cold smoking above 25°C, which enters the bacterial danger zone without cooking the product through","Over-smoking, which deposits excessive creosote and produces an acrid, bitter flavor"}
Ruhlman & Polcyn, Charcuterie: The Craft of Salting, Smoking, and Curing; Larousse Gastronomique; McGee, On Food and Cooking