A Neapolitan baked potato cake: boiled potatoes are riced and beaten with eggs, grated Parmigiano or pecorino, butter and milk into a soft dough, then layered in a buttered, breadcrumb-lined dish with diced salami and cubes of provola or mozzarella, topped with more breadcrumb and baked until the surface sets into a crisp golden crust. It is turned out as a single cake and cut into squares. Despite the French name, it is a thoroughly Neapolitan dish, eaten hot as a main course or as a substantial side. The dialect spelling «gattò» (also written gateau di patate) comes straight from the French gâteau.
The name traces to the French gâteau, a generic word for any sweet or savoury cake, adopted into Neapolitan as «gattò». It dates to the Bourbon court of Naples: after the 1768 marriage of Maria Carolina of Austria to Ferdinand IV, French taste took hold in the capital and the high-ranking French cooks brought to the city's noble kitchens were nicknamed «monzù», a Neapolitan corruption of monsieur. The dish is popularly said to have been served at that royal wedding banquet, though a baked potato sformato of humbler, peasant character predates the French label; what the monzù chefs and the period really contributed was the prestige name and the refined court treatment, after which Neapolitan cooks rebuilt it with local salami, provola and mozzarella. There is no single recorded inventor.
The first thing is the crust: a thin, crackling shell of toasted breadcrumb and browned cheese, giving way to a dense, soft, almost custardy potato interior bound by egg. Pockets of melted provola pull into strings as you cut it, and the diced salami lends salt and a faint cured-pork bite throughout. It eats rich and savoury, warm rather than piping hot, the potato mild against the sharp Parmigiano. Done well it holds its shape in a clean square with a moist crumb; overworked or under-dried potato turns it gluey and heavy, and too cool an oven leaves the crust pale and soft instead of crisp.
Riced potato keeps the starch granules intact and the texture light; mashing or food-processing them works the starch and turns the cake gummy, so the potato is pressed through a ricer or sieve while hot and dry. The eggs are the binder — their proteins coagulate in the oven and set the soft mass into a sliceable cake, the same custard logic as a sformato. The breadcrumb lining and topping do two jobs: they release the cake cleanly from the dish and, exposed to dry oven heat, brown by the Maillard reaction into the crisp gratin crust. The cheese is buried inside so it melts to strings rather than scorching, while the surface dries and sets first.
Variations
Family recipes differ on the cheese — provola, scamorza, fior di latte or plain mozzarella — and on the cured meat, with cooked ham, mortadella or Neapolitan salami all common; some studded with cubes of these together. Many fold in cooked peas or, in spring, leave them out. The same construction appears across the South as «gattò di patate» or simply tortino, and an individual-portion version is baked in small ramekins. It is a classic way to use leftover boiled potatoes, and a meatless version skips the salami entirely.
On the Palate
Where Gattò di Patate sits in the Italian flavor cloud
Ingredients
Serves 6
How it's made
8 steps · 45 min active + 45 min waiting
- 140 min
Boil unpeeled potatoes until completely tender, then peel them while still hot.
- 25 min
Press the hot potatoes through a ricer or sieve into a bowl and let the steam escape briefly.
Watch outRice or sieve the potatoes while hot and let the steam escape — never mash or process them, or the worked starch turns the cake gummy.
- 38 min
Beat in eggs, grated Parmigiano, softened butter, a little warm milk, salt, pepper and nutmeg to a soft, smooth dough.
- 43 min
Butter a baking dish and coat it all over with breadcrumbs.
- 56 min
Spread half the potato in the dish, scatter over the diced salami and cubes of provola, then cover with the remaining potato and smooth the top.
- 62 min
Sprinkle the surface with breadcrumbs and dot with flakes of butter.
- 738 min
Bake at 200°C for about 35 to 40 minutes, until the crust is deep golden and crisp.
Watch outButter the dish and coat it fully with breadcrumbs — this both releases the cake clean and browns into the crisp gratin crust.
- 810 min
Rest for 10 minutes, then turn out or cut into squares and serve warm.
Watch outBake until the crust is deep golden and crisp — the egg has to set inside to hold the soft mass as a sliceable cake.
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