Canard au Sang: The Legendary French Pressed Duck Recipe

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Few dishes in French cuisine carry as much ceremony as canard au sang — pressed duck in blood sauce. At Paris's La Tour d'Argent, each duck has arrived with its own serial number since 1890, and more than a million numbered ducks have crossed the dining room. Here is the history, the technique, and an adapted recipe for home cooks.

The History of Pressed Duck

From Rouen to Paris

Pressed duck began in Rouen, Normandy, where a 19th-century chef is credited with first roasting a young duck rare and extracting its juices for sauce. It was Frédéric Delair, born in Rouen, who elevated the dish to legend when he made it the signature of La Tour d'Argent on the Quai de la Tournelle around 1890. Auguste Escoffier later carried the recipe to London's Savoy.

The Numbered Ducks

Since 1890, every duck served at La Tour d'Argent has received a numbered certificate. The guest book reads like world history: number 328 went to Edward VII in 1890, number 40,312 to King Alfonso XIII, number 53,211 to Emperor Hirohito, number 112,151 to Franklin D. Roosevelt. The restaurant prepares roughly 250 ducks a week and has long since passed its millionth bird.

How Canard au Sang Is Made

The Roast

It starts with a young duck — traditionally a caneton from Challans in the Vendée. The bird is roasted only briefly, until rare, then rested. The legs, breasts, and liver are removed and set aside.

The Press and the Blood Sauce

The remaining carcass goes into an ornate silver duck press, where pressure extracts the blood, marrow, and juices. Tableside, the maître d'hôtel builds the sauce au sang: the pressed juices reduced with red wine, enriched with butter and cognac, and thickened with the ground, seasoned liver.

Two Courses From One Duck

The breast is thinly sliced and served nappéd with the blood sauce. The legs return as a second course — typically crisped or grilled and served simply, often with a green salad.

Canard au Sang at Home: An Adapted Recipe

A true pressed duck requires a duck press, but this adaptation captures the spirit — rare duck breast in a dark, glossy, cognac-laced sauce.

Ingredients

  • 1 whole young duck (about 2 kg), or 2 duck breasts plus 2 legs
  • Salt and freshly ground pepper
  • 2 shallots, finely minced
  • 250 ml dry red wine
  • 250 ml rich duck or veal stock
  • 60 ml cognac
  • 80 g cold butter, cubed
  • 1 tsp red wine vinegar or lemon juice

Method

  1. Score the duck skin, season generously, and roast at 220°C (425°F) until the breast reads rare — about 20–25 minutes for breasts alone, or until a whole bird's breast is still pink. Rest 15 minutes.
  2. Carve the breasts off the bone and slice thinly. Separate the legs and crisp them skin-side down in a hot pan; keep warm for the second course.
  3. In the same pan, soften the shallots in rendered duck fat. Add the red wine and reduce by two-thirds. Add the stock and reduce until syrupy.
  4. Off the heat, whisk in the cognac, then mount the sauce with cold butter a cube at a time. Finish with vinegar or lemon juice and season.
  5. Warm the sliced breast gently in the sauce — do not boil — and serve immediately, legs to follow.

Note: the authentic sauce uses blood pressed from the carcass. If your butcher can supply fresh duck blood, whisk in 2–3 tablespoons at the end and bring just to a bare simmer for food safety.

Frequently Asked Questions (FAQ)

What is canard au sang?

Canard au sang — literally "duck in blood" — is the classic French pressed duck: a young duck roasted rare, its carcass crushed in a silver press, and the extracted blood and juices built into a rich sauce with red wine, butter, and cognac. It has been the signature dish of Paris's La Tour d'Argent since 1890.

Can you make pressed duck without a duck press?

Yes, in adapted form. The home version above roasts the duck rare and builds a glossy sauce from reduced duck stock, red wine, cognac, and butter, finished with duck blood from a butcher if available. It captures the flavor and presentation; only the tableside pressing ritual is lost.

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