Boudin Noir Normand

Ingredients

• 1 litre fresh pig's blood, same-day; stir continuously from collection
• 1 splash white wine vinegar, added to blood immediately as anti-coagulant
• 200 g onions, diced, sweated until soft and golden
• 30 g lard or unsalted butter, for sweating onions
• 200 g Reinette apple or firm cooking apple, diced, sautéed briefly in butter until just golden but still firm
• 200 ml crème fraîche
• For the quatre-épices
• 1 tsp white pepper, ground
• ¼ tsp nutmeg, ground
• ¼ tsp clove, ground
• ¼ tsp ginger, ground
• 1 tsp fine salt
• 1 splash Calvados, optional
• 1 length natural hog casings, soaked and rinsed
• To serve
• 200 g Reinette apple or firm cooking apple, sliced, for sautéing
• 30 g unsalted butter, for sautéing apple slices
• 1 dusting sugar, for the sautéed apple slices
• 500 g floury potatoes, for pommes vapeur

Method

1. 1
   The moment the blood is collected, add a splash of vinegar and stir continuously. Coagulation begins immediately without agitation; the vinegar and motion together keep the blood fluid and workable. The blood is ready when it pours smoothly and shows no fibrous clotting.
2. 2
   Sweat the diced onions in lard or butter over medium-low heat until soft and golden throughout. Separately, sauté the diced apple in butter over medium heat until just golden on the surface but still firm at the centre — they will soften further during poaching. Both are done when they yield no resistance to a knife tip.
3. 3
   Combine the blood, cooked onions, sautéed apple dice, crème fraîche, quatre-épices, salt, and Calvados if using. Stir to a uniform, fluid mixture. The filling is ready when it coats the back of a spoon and the apple pieces are evenly distributed without sinking.
4. 4
   Fill the hog casings with the mixture without air pockets, and tie into sausages of the desired length. Do not prick the casings — a breach allows the blood to leak and the sausage to collapse during poaching.
5. 5
   This is where the dish lives or dies. Bring a large pot of water to 78–80 °C and clamp a thermometer to the pot to maintain this window without deviation. Lower the boudins into the water and poach for 20–25 minutes. The temperature must never exceed 82 °C: above this threshold the blood proteins over-set, producing a grainy, dry interior that no subsequent step can correct. The boudins are done when they feel firm and set under gentle finger pressure and the juices run clear when the tip of a skewer is inserted briefly.
6. 6
   Transfer the poached boudins immediately to an ice-water bath to arrest cooking and fix their shape. Hold until fully cold to the touch.
7. 7
   To serve, griddle the boudins whole over medium heat, starting skin-side down. Hold without turning for 4–5 minutes to develop a proper crust. Continue for a total of 8–10 minutes until the skin is taut, lightly crispy, and the sausage is heated through — or slice thickly and pan-fry in butter to the same result. The boudin is ready when the skin resists a light pinch without yielding.
8. 8
   Sauté the apple slices in butter with a dusting of sugar until golden and tender. Serve alongside the boudin with pommes vapeur. The plate is complete when the blood, apple, and potato are present together.