Charcuterie & Butchery
Caul Fat / Crépine
Also: crépine, crepine, lace fat, omental fat, caul
The lacy, web-like fat membrane from a pig's stomach lining used to wrap sausages, crépinettes, and whole birds, providing self-basting fat and natural casing that dissolves during cooking.
/KAWL FAT / kray-PEEN/English 'caul' from Latin 'caula' (enclosure, sheepfold) via Old French; the anatomical sense of a membranous covering appears in English from at least the 14th century. French 'crépine' from Old French 'crespe' (curly, lacy), referring to the membrane's web-like texture.
Definition
Caul fat — known in French as crépine — is the greater omentum of the pig, a thin, lace-like membrane of fat that envelops the stomach and intestines. Its distinctive appearance, resembling a delicate net or fishnet stocking, results from strands of fat running through a connective tissue matrix. It is harvested during butchery, soaked in cold salted water (or lightly acidulated water) to soften and clarify it, and then spread flat for use. Its value in charcuterie is threefold: First, as a natural casing, it holds loosely bound forcemeats — crépinettes (small, flat pork sausages), faggots, caillettes, and staffed birds — in shape without the preparation required for intestinal casings. Second, as the fat melts during cooking, it continuously bastes the wrapped item from the outside in, keeping lean or dense preparations moist while forming a golden, self-lacquering crust. Third, because the caul is thin and largely dissolves into the surrounding fat by the time the item is fully cooked, it leaves no tough or chewy residual casing to remove — the finished product appears entirely naked. Beyond sausage applications, caul is used to wrap whole quail, boned poultry legs, loins of game, and lean roasts before trussing and roasting. In Greek and Middle Eastern cuisines, the equivalent of caul fat wraps preparations such as the Greek skewered sausage kokoretsi and Lebanese kafta. Lamb caul fat is also used, though less commonly than pork caul. Caul fat is a perishable item; fresh caul keeps refrigerated for 2–3 days and can be frozen for several months.
In use
“The butcher wrapped each crépinette of herbed pork in a single layer of caul fat, knowing the lacy membrane would melt away during pan-frying and leave a glistening, self-basted crust.”
See also
- TechniqueSausage Making
- glossaryForcemeat
- CutPork Belly
Related terms
References
- 1.Charcuterie: The Craft of Salting, Smoking, and Curing — Michael Ruhlman & Brian Polcyn (Norton, 2005)
- 2.The River Cottage Meat Book — Hugh Fearnley-Whittingstall (Ten Speed Press, 2007)
- 3.The Professional Chef, 9th ed. — The Culinary Institute of America (Wiley, 2011)
- 4.Larousse Gastronomique — Prosper Montagné (Clarkson Potter, 2009 ed.)
Confidence: high
Notes
Sourcing and preparation
Caul fat is increasingly available from specialty butchers, farmers' markets, and online heritage-breed pork suppliers. To prepare: submerge in cold water with a splash of white wine vinegar for 30 minutes to remove any residual blood and odor, then gently separate and spread the membrane on a clean surface, removing any thick clumps of solid fat with scissors. Work quickly at room temperature — cold caul tears; warm caul is pliable.
Cooking behavior
At temperatures above 130 °C, the fat strands of caul render completely, basting the enclosed item with continuous pork fat while the connective tissue membrane shrinks and, in most applications, disappears entirely. In braised preparations the rendering is slower, but the effect is the same: a moist, self-saucing interior. For roasted birds or loins, a high-heat finish is sometimes needed to ensure the caul crisps rather than pools beneath the item.
Substitution
When caul fat is unavailable, thinly sliced fatback (bardage) or pancetta can substitute for wrapping duties, though neither dissolves as cleanly. In non-pork preparations, lamb caul fat provides the closest functional equivalent.