Italian Polenta Croquettes with Gorgonzola Dolce and Walnuts | Crocchette di Polenta, Gorgonzola Dolce e Noci
Crocchette di polenta are what northern Italian kitchens do with yesterday's polenta: cut, crumbed and fried until the crust shatters. Here a hidden cube of gorgonzola dolce waits in the centre, and chopped walnut in the crumb echoes the cheese. Bite through and the core runs soft, creamy and faintly sweet.
Yield: 16 croquettes, serving 6 as an appetizer. Prep: 1 hour, plus 12 hours resting and 3 hours freezing. Cook: 1 hour. Difficulty: intermediate. Course: antipasto.
The Story
Polenta was not always yellow. Before maize crossed the Atlantic and reached the plains of Veneto and Lombardy in the sixteenth century, northern Italians boiled millet, spelt, chestnut flour and chickpea meal into porridges they also called polenta. Maize won because it yielded more per field and fed a large family for days. By the eighteenth century it was the daily bread of the Alpine foothills, poured onto a wooden board, cut with a length of string and eaten hot or cold.
Nothing was wasted in those kitchens, so the cold slice left in the pan became tomorrow's breakfast, toasted on the embers, grilled over the fire or fried in lard. The crocchetta is the refined descendant of that habit, a way of turning leftovers into a dish worth serving to guests. It belongs to the same family as the fried polenta sticks of Lombardy and the polenta fritta sold in the osterie of the Veneto. Polenta and cheese meet everywhere in the north, from baked polenta layered with fontina to the polenta taragna of the Valtellina, stirred through with local mountain cheese.
Gorgonzola is the natural partner. Gorgonzola DOP is made in Piedmont and Lombardy and takes its name from the town east of Milan, where local tradition places its birth among the herds of the autumn transhumance. The dolce version is the young one, matured for at least 50 days, soft, spreadable and mild, with a blue vein that tastes more of cream than of spice. Walnuts grow in the same valleys, and corn, blue cheese and nut have shared northern tables for generations.
The walnut deserves its place. Lombardy and Piedmont have long grown walnut trees along field edges and farm lanes, and the nuts were pressed for lamp and kitchen oil as well as eaten. Their slightly bitter, tannic skin is exactly what a rich blue cheese asks for. Add a thread of honey, as cheese boards in the Langhe still do, and the sweet, salty and bitter triangle that defines this dish is complete.
The croquette itself is a modern kitchen idea built on that old foundation. Where the grandmother cut a cold slab and fried it plain, the restaurant cook hides a cube of cheese inside, so the first bite is crisp and the second is molten. The method is simple, but it rewards patience, because every stage from the pot to the fryer depends on time and temperature rather than on speed.
Ingredients
Serves 6 as an appetizer. Buy a wedge of gorgonzola dolce DOP rather than a spread, and choose coarse polenta that cooks for 40 minutes. Instant polenta will not retrograde into a block firm enough to fry.
For the polenta
Water, 4 1/4 cups (1 L)
Fine sea salt, 1 1/2 tsp (9 g)
Yellow polenta, coarse ground, 1 1/4 cups (200 g)
Unsalted butter, 2 tbsp (30 g)
Parmigiano Reggiano, finely grated, 2 oz (55 g)
Freshly grated nutmeg, 1 pinch
Olive oil, for greasing the dish, 1 tsp (5 ml)
For the filling and crust
Gorgonzola dolce DOP, cold, 5 oz (140 g), cut into 3/4 inch (2 cm) cubes
Walnuts, finely chopped, 1/3 cup (40 g)
Fine dry breadcrumbs, 1 1/2 cups (150 g)
All purpose flour, 1/2 cup (65 g)
Large eggs, 2, beaten with 1 tbsp (15 ml) water
Freshly ground black pepper, 1/4 tsp (0.5 g)
For frying and serving
Peanut or sunflower oil, 2 quarts (2 L)
Baby arugula, 2 cups (40 g)
Lemon juice, 1 tbsp (15 ml)
Extra virgin olive oil, 1 tbsp (15 ml)
Chestnut or acacia honey, 2 tbsp (40 g)
Toasted walnut halves, crushed, 1/4 cup (30 g)
Flaky sea salt, to finish
Lemon wedges, 1 lemon, cut into 6, for serving
Preparation
Cook the polenta
Bring the water and salt to a boil in a heavy 4 quart (4 L) pot. Rain in the polenta in a thin stream while whisking, then switch to a wooden spoon and lower the heat until the surface barely bubbles. Cook for 40 minutes, stirring every few minutes and scraping the corners, until the polenta pulls away from the sides. Off the heat, beat in the butter, Parmigiano and nutmeg. Taste and adjust the salt, remembering that the cheese and Parmigiano are salty. It should be thick enough to hold a standing spoon.
Chill the polenta for 12 hours
Oil a 9 by 9 inch (23 by 23 cm) baking dish, scrape the hot polenta in and smooth it to a layer about 1 inch (2.5 cm) thick. Press parchment onto the surface so no skin forms. Cool for 1 hour on the counter, then refrigerate for at least 12 hours and up to 48. Do not shorten this rest, because it turns porridge into something you can cut.
Freeze the gorgonzola cubes
Cut the cold gorgonzola into sixteen cubes of 3/4 inch (2 cm), each about 1/3 oz (9 g). Set them apart on a parchment lined plate and freeze for at least 3 hours, until hard as ice. Handle them with a fork or cold fingers so they do not soften, and keep them in the freezer until the moment you shape.
Shape around the frozen core
Turn the cold polenta out onto a board. It should hold like a firm block. Divide it into sixteen portions of about 1 1/2 oz (40 g). With damp hands, flatten one portion in your palm, set a frozen cube in the middle and close the polenta around it. Roll gently into an oval about 2 1/2 inches (6 cm) long, sealing every seam, since any gap becomes a leak in the fryer. Return the tray to the freezer for 20 minutes.
Bread and set the coating
Set out three shallow plates: flour mixed with the pepper, the beaten eggs, and the breadcrumbs mixed with the chopped walnuts. Roll each croquette in flour, shake off the excess, dip in egg, then press into the crumbs until covered. For a sturdier crust, repeat the egg and crumbs once more. Rest the croquettes on a rack in the refrigerator for 30 minutes, which lets the crust dry and grip the surface.
Fry at 350°F
Heat the oil to 350°F (175°C) in a deep heavy pot, at least 3 inches (7.5 cm) deep, with a thermometer clipped to the side. Fry four croquettes at a time for 3 1/2 to 4 minutes, turning once, until deep golden. Let the oil return to 350°F between batches. Lift with a spider onto a rack, salt lightly and hold in a 200°F (95°C) oven while you fry the rest. Fry one test croquette first and cut it open to check that the centre is molten and the polenta is hot, then continue with the full batches.
Dress the arugula
Just before serving, toss the arugula with the lemon juice, olive oil and a pinch of salt. Warm the honey for 30 seconds so it flows in a thin thread. Keep the arugula cold until the last moment so it stays crisp.
Plating
Serve within 5 minutes of leaving the fryer, on warm plates. Give each guest 2 or 3 croquettes, set on a small mound of dressed arugula so the leaves catch any escaping oil and stay bright. Drizzle a thin thread of warm honey over the top and scatter crushed toasted walnuts and a few flakes of sea salt.
Cut one croquette open at the table to show the molten centre, then let guests eat the rest with their hands. Keep the plate spare: the crust, the cheese and the peppery green need nothing else. For a fuller meal, add a dish of sautéed bitter greens or a simple radicchio salad dressed with red wine vinegar, whose bitterness suits the sweet cheese. A small dish of extra honey on the side lets guests decide how sweet to go.
Professional Technique
Two things make this croquette work, and both take time rather than skill. The first is retrogradation. Freshly cooked polenta is a soft gel: the starch granules have swollen and released amylose into the water. As the mass cools, those amylose chains slowly realign into an ordered, rigid network that locks the water in place. That reorganization is not instant. After an hour the polenta is only lightly set, and it collapses in the fryer. After at least 12 hours in the refrigerator at 40°F (4°C), and ideally 24, the block cuts cleanly, holds a corner and molds around the cheese without smearing. Freezing does not substitute for this rest.
The second is the frozen heart. Gorgonzola dolce is soft and fatty, and it starts to flow well below body temperature. A cold cube would liquefy within the first minute of frying and push through the weakest seam. Cut into 3/4 inch (2 cm) cubes of about 9 g and frozen solid for at least 3 hours, the cheese stays rigid while the crust sets in the first 60 to 90 seconds, then softens and melts just as the croquette finishes at 3 1/2 to 4 minutes. A cube under 1/2 inch (1.2 cm) melts too early, and one over 1 inch (2.5 cm) stays icy in the centre.
Oil temperature closes the loop. At 350°F (175°C) the crust seals fast. Below 325°F (165°C) it absorbs oil before setting and the cheese escapes, while above 375°F (190°C) the walnut crumb scorches before the core melts. Keep a thermometer in the pot and adjust the flame between batches.
Texture and Moisture Control
A crisp crust needs a dry surface and a body that does not steam. Retrograded polenta binds its water inside the gel, so little vapor pushes against the coating in the hot oil, and the crust stays intact instead of blistering and cracking. Pat the shaped croquettes dry before flouring, since a wet surface makes the flour paste and the crumbs slide off.
The walnut in the crumb adds nutty flavour and browns quickly, so trust colour rather than the clock. Inside, the goal is a polenta that is creamy but set, wrapped around a cheese that has just melted, not one that has drained away. Serve promptly, because the centre thickens as it cools and the crust softens as steam migrates outward, which is why holding times beyond 20 minutes cost crispness.
Drain on a rack, never on paper, so steam escapes from underneath. Salt while the surface is still glossy with oil. Hold the finished batches uncovered in a 200°F (95°C) oven, and dress the arugula last, because lemon and oil wilt it in minutes and the acidity is what cuts the richness of the cheese. A squeeze of lemon over the hot croquettes does the same.
Professional Mise en Place
Equipment and tools
Heavy 4 quart (4 L) pot for the polenta and a deep heavy pot for frying
Deep fry thermometer, spider, wire rack and rimmed tray
9 by 9 inch (23 by 23 cm) dish, parchment and a small bowl of water for damp hands
Three shallow plates for the breading and a sharp knife for cubing the cheese
Prepared ahead
Polenta cooked and chilled 12 to 48 hours ahead
Gorgonzola cubed and frozen the day before
Croquettes shaped, breaded and refrigerated up to 4 hours ahead
Walnuts chopped and toasted for the garnish, honey measured out
Frying oil filtered and measured into the pot
Service setup
Oil at 350°F (175°C) and oven at 200°F (95°C)
Warm plates, arugula ready to dress, honey warmed
One person frying, one person plating, so the croquettes never wait
Kitchen towels and a lid nearby for any oil spill or flare up
Thermometer checked in the oil before the first batch goes in, so the temperature is steady from the start
Cutting board wiped dry so nothing slides while you plate
Chef Tips
Choose gorgonzola dolce that is cold and firm from the fridge, since a very ripe, runny wedge will not cut into clean cubes. Use coarse ground polenta, not instant, because it sets to a sturdier block. Pull the frozen cubes from the freezer only as you shape, a few at a time.
Toast the walnuts for the garnish, but add the chopped walnuts to the crumb raw, since they toast in the fryer. Fry one test croquette first and cut it open, then adjust the oil temperature or the frying time before committing the whole batch. Rest the finished croquettes on the rack for 1 minute before serving so the centre settles.
Season the polenta a little more assertively than you would for eating hot, because chilling dulls salt. Scale the recipe up freely, but shape in batches of eight so the frozen cubes never sit out.
Serve with a sharp element. A squeeze of lemon, pickled pears or a peppery green all lift the richness of a fried blue cheese centre and keep each bite fresh.
Common Mistakes
Chilling the polenta for only 2 hours. It looks set but has not retrograded, so it slumps and cracks in the oil. Give it 12 hours, or overnight, and it will slice cleanly.
Skipping the freezer. Room temperature cheese melts before the crust sets and leaks into the oil.
Cutting cubes too small. Under 1/2 inch (1.2 cm) they melt early and vanish, leaving a hollow shell and a greasy pot.
Overcrowding the pot. More than four at a time drops the oil below 325°F (165°C) and makes the crust greasy and heavy.
Leaving seams open. Pinch and roll every join closed before breading, because even a small crack lets molten cheese run into the oil.
Using instant polenta. Precooked meal never forms a firm, cuttable gel, so the croquettes stay soft, lose their shape and burst open when fried.
Frying straight from the counter. Croquettes that have warmed for an hour lose their frozen core. Keep them cold until the oil is ready, and fry no more than one batch ahead of service.
Wine Pairing
Franciacorta DOCG: Lombard metodo classico bubbles and bright acidity cut through the frying oil and the fat of the cheese. Brut versions with low dosage keep the pairing dry, and a Satèn style adds a softer, creamier texture that mirrors the cheese. The fine mousse scrubs the palate after each crisp bite, while the yeasty, toasty notes echo the walnut crust. Serve it well chilled at 45°F (7°C).
Lugana DOC: A dry white from the shores of Lake Garda with saline minerality and citrus acidity. It refreshes against the creamy blue cheese without competing, and its almond finish sits beside the walnuts. A medium body gives it enough weight to stand up to the crust, and it is served chilled at 48°F (9°C), which suits a hot fried dish very well.
Barbera d'Asti DOCG: A red with high acidity and soft tannin, so it slices through gorgonzola richness rather than clashing with the blue vein. Cherry fruit brightens the polenta, and the modest structure never overwhelms the delicate crust. Serve it slightly cool at 60°F (16°C) to keep it lively, and let its acidity carry through the rich blue cheese from the first bite to the last.
Valtellina Superiore DOCG: Nebbiolo from the Alpine terraces of Lombardy, dry and tightly wound, with firm acidity and fine tannin. It stands up to the salty, pungent cheese and suits polenta, which has long been served with it in the same valleys. Choose a younger bottle rather than an aged one, so the tannin stays soft and fruity against the sweet honey.
Storage & Reheating
Fried croquettes are best eaten within minutes. Leftovers keep in a shallow airtight container in the refrigerator for up to 2 days. Reheat on a rack in a 400°F (200°C) oven for 8 to 10 minutes, never in a microwave, which turns the crust soft and the centre runny.
For the freezer, freeze the unfried breaded croquettes on a tray, then bag them for up to 2 months. Fry straight from frozen at 350°F (175°C) for 5 minutes, in small batches. Do not refreeze thawed croquettes. Cooked polenta keeps refrigerated, covered, for 3 days before shaping. Store the frozen cheese cubes in a sealed bag for up to 1 month. Let leftover oil cool completely, then strain used frying oil once through a fine sieve and keep it for one more use only, since reused oil darkens quickly.
Nutrition
Per serving, based on 6 servings of 2 to 3 croquettes:
Calories: 520 kcal
Total Fat: 30 g
Saturated Fat: 11 g
Trans Fat: 0.3 g
Unsaturated Fat: 19 g
Cholesterol: 100 mg
Sodium: 1050 mg
Total Carbohydrates: 47 g
Fiber: 3 g
Total Sugars: 7 g
Added Sugars: 5 g
Protein: 16 g
Lactose: under 1 g
Micronutrients: calcium, phosphorus, vitamin B12, vitamin A, selenium, manganese, magnesium
These figures are estimates and vary with the cheese and the oil absorbed.
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