Italian Duck Confit Ravioli with Brown Butter, Sage and Piedmont Hazelnuts | Ravioli d'Anatra Confit con Burro Nocciola, Salvia e Nocciole Piemonte
There are two ways to put duck inside pasta. One is to braise it, which gives a wet filling that has to be bound and thickened until it stops tasting of duck. The other is to confit it, which drives the moisture out slowly under fat and hands you meat that needs almost nothing done to it. This recipe takes the second road.
The sauce is three ingredients and no liquid except the water the pasta cooked in. Butter is taken to the point where its milk solids turn chestnut, sage leaves are dropped in to crisp, and toasted Piedmont hazelnuts are crushed over the top. Nothing competes with the filling; everything runs parallel to it.
What makes the dish work is restraint in the filling. Confit duck is already salty from the cure and rich from the fat, so it wants a little roasted shallot for sweetness, a little Parmigiano for savour, and then to be left alone. Cream, breadcrumb and herbs solve a problem that confit has already solved.
Yield: 4 servings, about 48 ravioli. Prep: 1 hour 30 minutes. Cure: 12 hours. Cook: 3 hours 20 minutes. Total: about 17 hours, most of it unattended. Difficulty: advanced. Course: primo piatto. Region: Piedmont, the Langhe and the Roero.
The Story
Piedmont is the Italian region that spent longest looking north. Ruled from Turin by the House of Savoy, whose territory straddled the Alps and whose court spoke French, its kitchens absorbed French method as a matter of course. That is why Piedmontese cooking uses butter where the south uses oil, and why a Gascon technique like confit sits here without any sense of trespass. Duck and goose were preserved under their own fat on both sides of the mountains long before a border was drawn through them.
The pasta belongs to the Langhe. Agnolotti del plin are small filled squares pinched shut with thumb and forefinger, the plin being the pinch itself, and they carry a dough so rich in yolk it turns deep gold. The traditional filling is roast meat left from Sunday, ground with its pan juices, which tells you what these were for: nothing in a farmhouse was thrown out. A confit filling is the same idea with a different preservation method.
The hazelnut is the third Piedmontese element and the one local to nowhere else. The Tonda Gentile Trilobata grows on the hills of the Alta Langa around Cortemilia, carries IGP protection as Nocciola Piemonte, and is prized for a thin skin that slips off after roasting. Piedmont built a confectionery industry on it, gianduja included, and in a savoury kitchen it does the work almonds do elsewhere, with more perfume.
Ingredients
For the duck confit
Duck legs, whole, 4, about 2 lb (900 g) total
Coarse sea salt, 2 tbsp (30 g)
Garlic cloves, crushed, 3
Thyme sprigs, 6
Bay leaves, 2
Black peppercorns, cracked, 1 tsp (3 g)
Duck fat, 3 cups (700 g), enough to cover
For the pasta dough
Italian 00 flour, 1 1/2 cups (200 g)
Durum wheat semola rimacinata, 1/3 cup (50 g)
Egg yolks, large, 8
Whole egg, large, 1
Extra virgin olive oil, 1 tsp (5 ml)
Fine sea salt, 1/4 tsp (1.5 g)
For the filling
Confit duck meat, picked and shredded, 10 oz (285 g)
Shallots, roasted whole and peeled, 2
Parmigiano Reggiano aged 24 months, finely grated, 1/2 cup (40 g)
Egg yolk, large, 1
Reserved duck fat, soft not melted, 1 tbsp (14 g)
Freshly grated nutmeg, a small pinch
Freshly ground black pepper and fine sea salt, to taste
For the brown butter sauce
Unsalted butter, cold, cut into cubes, 7 tbsp (100 g)
Fresh sage leaves, 16
Piedmont hazelnuts, skinned and toasted, 1/3 cup (45 g)
Reserved pasta cooking water, 1 cup (240 ml)
Parmigiano Reggiano, finely grated, 1/3 cup (25 g)
Finely grated lemon zest, from 1/2 lemon
For the water
Water for boiling, 6 quarts (5.7 liters)
Coarse sea salt, 4 tsp (24 g)
Preparation
Cure the duck legs overnight
Rub the legs all over with the coarse salt, cracked pepper, crushed garlic, thyme and torn bay, lay them skin side up in a dish, cover and refrigerate 12 hours. The salt draws water out of the flesh and carries seasoning back in. Past 18 hours the meat turns firm and hard to shred. Rinse the legs, pat them dry and let them reach room temperature.
Cook the legs slowly under fat
Melt the duck fat in a heavy oven dish, settle the legs in fully submerged and cook at 200°F (95°C) for 3 hours. The fat should never bubble beyond the occasional lazy blip: confit is low temperature poaching, and above 210°F (99°C) the fibres toughen before the connective tissue melts. The legs are ready when a skewer meets no resistance at the thickest part of the thigh. Cool them in the fat an hour.
Make the yolk rich dough
Mound the two flours on a board, make a well and add the yolks, whole egg, oil and salt. Draw the flour in with a fork until a shaggy mass forms, then knead 10 minutes until smooth, dense and slow to spring back. It feels firmer than standard egg pasta because there is almost no water in it. Wrap it tightly and rest 1 hour at room temperature so the gluten relaxes.
Build the filling
Pull the skin off the legs, pick the meat from the bones and shred it with two forks, discarding any sinew. Mash the roasted shallots to a paste and fold them through with the Parmigiano, the yolk, the soft duck fat, the nutmeg and plenty of pepper. Taste before adding salt: a cured leg usually needs none. The filling should hold together when squeezed but still show strands of meat.
Roll the sheets thin
Cut the dough into four pieces, keeping three covered. Run each through the machine from the widest setting down, folding and passing twice at the first, then once at each following one, until the sheet is about 1/32 inch (0.8 mm) thick and you can see your hand through it. The yolk lets this dough take that thinness. Keep finished sheets under a damp cloth: a dried edge will not seal.
Fill and seal the ravioli
Lay a sheet out and pipe teaspoon sized mounds of filling in a line about 1 inch (2.5 cm) apart. Mist the sheet lightly with water rather than brushing it, fold the pasta over and press outwards from each mound with the side of your hand to drive the air out before sealing. Trapped air expands in the water and bursts the ravioli. Cut them into squares with a wheel and set them apart on a semola dusted tray.
Toast the hazelnuts and cook the pasta
Roast the hazelnuts at 325°F (165°C) for 10 minutes, rub the skins off in a cloth and crush them roughly. Bring the water to a boil and salt it with 4 tsp (24 g), lighter than usual because filling and cheese both carry salt. Drop the ravioli in and pull straight back to a bare simmer, since a rolling boil tears filled pasta open. They need 3 to 4 minutes, until the sealed edge is tender. Reserve a cup of water.
Brown the butter and finish in the pan
While the ravioli cook, melt the butter in a wide pan over medium heat and let it foam, then subside. When the solids turn hazel brown and the smell shifts from dairy to toasted nut, drop in the sage and stand back as it crackles. Add a ladle of pasta water at once to stop the browning, then lift the ravioli in. Shake the pan a minute, add the Parmigiano off the heat and swirl until glossy.
Plating
Warm the plates properly. Brown butter sets to a greasy film the moment it meets a cold surface, and a plate off the shelf turns a glossy sauce dull before it reaches the table. Shallow bowls beat flat plates, gathering the sauce in the centre instead of letting it spread to the rim.
Arrange ten to twelve ravioli per plate in a single layer, sealed edges the same way and never stacked, since the weight of one on another squeezes filling through the seam. Spoon the remaining sauce over, let the sage fall where it lands, then scatter the hazelnuts so they sit on the pasta rather than in the butter, where they soften within a minute. Finish with lemon zest and Parmigiano and carry the plates out at once.
Professional Technique
Confit is a moisture removal technique disguised as a cooking one. Fat holds no water, so a leg submerged in it cannot boil and the only liquid leaving the meat is its own. Over three hours at 200°F (95°C) the collagen converts to gelatin while the muscle proteins stay relaxed, and the leg loses roughly a quarter of its weight as water. What is left is denser and more savoury than any braise.
Brown butter is a controlled Maillard reaction in a very small window. Butter is about 16 percent water and 2 percent milk solids, and nothing browns until that water has boiled off, which is what the foaming stage is. Once the pan goes quiet the solids are dry and their proteins and lactose start reacting, producing the nutty aromas the sauce is built on. From pale gold to burnt is about 30 seconds, which is why a ladle of pasta water goes in the moment the colour is right: it drops the pan below the browning threshold and turns fat into sauce in one motion.
Texture and Moisture Control
The filling has to be dry enough to hold a seal and moist enough to eat. Confit meat arrives at roughly the right point on its own and the yolk and duck fat bring it back just far enough, while a filling built with braising liquid weeps into the dough overnight and welds the ravioli to the tray. If the mixture looks wet, chill it 30 minutes and let the fat firm before piping, rather than adding breadcrumb, which makes the filling taste of bread.
The sauce is an emulsion of butter fat in starchy water and the ratio decides everything. A cup of pasta water for 7 tbsp (100 g) of butter is the working figure, added in three parts, and the dissolved starch holds the fat suspended. Filled pasta sheds far less starch than dried pasta, so this water is thinner than you may expect and the pan needs more agitation. Add the Parmigiano off the heat: above about 180°F (82°C) it expels its fat and the sauce breaks.
Professional Mise en Place
Everything except the final two minutes can be done ahead, which is what makes this practical for service.
Equipment and tools
Pasta machine with a steady clamp and a fluted wheel
Heavy oven dish deep enough to submerge the legs
Piping bag with a plain tip, or two teaspoons
Wide low sided pan for the butter, plus a spider skimmer
Trays dusted with semola, damp cloth for the sheets
Prepared ahead
Duck confit, up to 2 weeks ahead, submerged in its fat
Filling, up to 2 days ahead, refrigerated in a sealed container
Pasta dough, up to 1 day ahead, wrapped tight and refrigerated
Ravioli formed, frozen on trays and bagged, up to 1 month
Hazelnuts toasted, skinned and crushed, on the day
Service setup
Water at a bare simmer, salted lighter than usual
Butter weighed cold per order, sage picked and dry
Pasta water jug filled from the first batch and kept hot
Bowls warm, cheese grated, zest cut only at the pass
Chef Tips
Make the confit in a bigger batch than you need. It keeps for weeks submerged in its own fat, improves over the first ten days as the salt evens out, and the spare legs crisp under a grill for a different meal. The strained fat roasts potatoes better than anything else you own.
Weigh the yolks rather than counting them. Egg size varies by up to 20 percent between boxes and this dough has no water to buffer the difference, so small yolks crack at the edges when rolled. You want about 5 oz (150 g) of yolk with the whole egg included. If it fights back at the third setting, rest it 20 minutes rather than adding liquid.
Freeze the ravioli if you are making them more than a few hours ahead. Filled pasta left in the refrigerator takes up moisture from the filling and welds itself to the tray, while frozen ravioli go straight into simmering water with one extra minute and no other change. Spread them apart first and bag them only once solid.
Buy Piedmont hazelnuts if you can find them. The Tonda Gentile has a thinner skin and a more aromatic oil than commodity nuts, which matters where the nut sits on top and is tasted on its own. Toast them the same day: a crushed hazelnut goes stale within hours.
Common Mistakes
Letting the confit fat simmer. Above about 210°F (99°C) the fibres contract and squeeze out the moisture you spent twelve hours seasoning, and the meat shreds into dry threads. The surface should barely move for three hours, and an oven thermometer is worth more than any timer.
Trapping air in the ravioli. Air expands as the pasta heats and forces the seam open, and a burst raviolo empties into the pot. Press outward from the mound with the side of your hand before sealing, and cut only once each pocket is flat against the dough.
Boiling filled pasta hard. A rolling boil tumbles the ravioli against each other and tears the seams. Bring the water to a boil, drop the pasta in and pull the heat straight back to a bare simmer for the 3 to 4 minutes they need.
Overworking the filling. Blitzed in a processor, confit duck becomes a pate that tastes of nothing in particular and feels pasty against the dough. Shred it with forks and leave the strands visible.
Taking the butter too far. Once past hazel brown the solids scorch and the whole sauce turns acrid, and there is no correcting it. Watch the colour rather than the clock and have the pasta water ready to stop the pan the second it is right.
Wine Pairing
Barbaresco DOCG: The senior match and the one this dish was written for. Nebbiolo from the Tanaro side of the Langhe has high acidity and firm but fine tannin, which cut straight through browned butter and confit fat, while its dried rose, tar and cherry aromatics sit alongside the sage rather than under it. A bottle with six or seven years on it has softened enough not to bully the filling.
Barbera d'Asti DOCG: The weekday answer in Piedmont and a good one here. Barbera has almost no tannin and unusually bright acidity, so it refreshes the palate between forkfuls without adding grip to a rich plate. Look for an unoaked bottling: barrel vanilla never agrees with the hazelnuts.
Roero Arneis DOCG: The white from the sandy left bank of the Tanaro, a real option rather than a compromise. Arneis is dry and restrained in aroma, with a faintly bitter almond finish and enough texture to meet butter, and that almond note lands directly on the toasted hazelnut. Served at 50°F (10°C) it keeps a heavy plate feeling lighter.
Ghemme DOCG: Nebbiolo from the volcanic soils of Alto Piemonte, north of the Langhe and cooler by several degrees. Leaner and more mineral than Barbaresco, with a savoury iron note and sharper acidity that works against the salt of a cured leg. The lighter body leaves room for the sage, which a bigger wine flattens.
Dolcetto d'Alba DOC: The bottle a Langhe household actually opens on a weeknight. Dolcetto is deeply coloured but soft, low in acid and modest in tannin, with dark plum fruit and a bitter almond finish that echoes the hazelnut. Served cool, around 59°F (15°C), it slides under the brown butter without asking for attention.
Storage & Reheating
The confit is the great keeper. Legs fully submerged in their strained fat hold 3 weeks in the refrigerator and 6 months in the freezer, and the fat seal does the work, so no part of a leg should break the surface. The finished filling keeps 2 days refrigerated and does not freeze well alone, since the yolk goes grainy on thawing.
Raw ravioli freeze better than they refrigerate. Spread them apart on a semola dusted tray, freeze solid in about 2 hours, bag for up to 1 month and cook from frozen with one extra minute. Refrigerated raw ravioli should be cooked within 4 hours, since the filling dampens the dough from inside.
Dressed ravioli keep 1 day refrigerated and should never be frozen once sauced. To reheat, put them in a wide pan with 3 tbsp (45 ml) of water per portion and a knob of butter, cover 2 minutes over low heat, then uncover and swirl until the sauce comes back. A microwave splits the butter and toughens the pasta; add the hazelnuts fresh.
Nutrition
Per serving, based on 4 servings of about 12 ravioli each:
Calories: 890 kcal
Total Fat: 56 g
Saturated Fat: 25 g
Trans Fat: 0.8 g
Unsaturated Fat: 29 g
Cholesterol: 520 mg
Sodium: 1080 mg
Total Carbohydrates: 55 g
Fiber: 3 g
Total Sugars: 3 g
Added Sugars: 0 g
Protein: 40 g
Lactose: 1 g
Principal micronutrients: iron, zinc, selenium, phosphorus, calcium, vitamin A, vitamin E, vitamin B12, niacin, folate
These figures are estimates. Cholesterol is high because of the yolk count in the dough, and the fat total depends on how much confit fat stays with the meat after picking.
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