Michetta (Rosetta Roll)

A michetta is a 70 to 90 gram soft-wheat roll with five petals opening around a raised centre. Its defining feature is invisible from outside: it is hollow. Tear one open and you find an empty chamber with a paper-thin film of crumb clinging to the crust, and nothing else.

That void is engineered. The dough is deliberately dry, refined between rollers until it is smooth and tough, stamped with a five-pointed iron and then proved upside down. In a steam-injected oven the trapped moisture inflates the roll, the stiff dough cannot follow the expansion, and it pulls away from the middle.

In Milan the michetta is simply what bread means: bought by weight at the prestinaio, the local word for baker, and eaten with anything. Elsewhere in Italy the same roll goes by the name rosetta. In 2007 the city of Milan granted it a Denominazione Comunale, a municipal mark with no legal force outside the city but a clear statement of ownership.

Mild, clean and almost neutral: this is not a bread with a flavour agenda. There is no sourness, no discernible fat and only a whisper of malt sweetness. What you taste is toasted wheat crust, because crust is nearly all there is.

The pleasure is structural. Fresh from the oven the shell shatters under your teeth with a dry crack, and then there is simply nothing to chew: the roll disappears. It is closer to eating a very thin, very fresh cracker shaped like a ball than to eating bread.

The hollow also changes what a filled roll tastes like. With no crumb to absorb, the salami or mortadella inside stays entirely itself, and the bread reads as texture rather than flavour. This is why Milanese fillings are dry and fatty: the bread contributes crunch and nothing more.

Three hours after baking that crack is gone, the shell has softened and the roll tastes of very little. There is no salvaging it beyond a spell in a hot oven.

Treat it as a container. Split it, fill it, close it: the hollow exists so that you do not have to hollow it out yourself, which is what people do to ordinary rolls before making a sandwich.

In Milan the filling comes from the salumeria next door: salame Milano, mortadella, cooked ham, coppa, with or without butter. Gorgonzola with walnuts is equally local. Keep the filling dry and fatty; tomato, wet mozzarella or any generous sauce will go straight through the shell within minutes, because there is no crumb to absorb it.

At the table it can be torn and used to mop a plate, but it is not the best tool for the job. Milanese braises (ossobuco, cassoeula, tripe) want a denser bread with crumb to soak.

Stale michette earn their keep. Halve them, pull out the film of crumb, toast the shells and use them as edible bowls for a baked egg or a soup. Ground up, they give an unusually fine breadcrumb, which is exactly what you want for breading a Milanese veal cutlet.

One rule above all others: buy it within a couple of hours of when you plan to eat it. This is not a bread you shop for in advance.

Almost all crust and almost no crumb means almost no water reserve, and that governs everything. A michetta is at its crispest for perhaps three to five hours after baking, which is exactly why Milanese bakeries fire several batches through the day rather than one in the morning. Left in a paper bag on the counter it holds up for half a day, the crust gradually softening as the little moisture in the shell migrates outward. Sealed in plastic the same shift takes about an hour and the crust turns leathery. By the following morning the shell has dried through and gone hard and brittle.

The fridge makes it worse, since bread firms fastest at temperatures just above freezing. Three to five minutes in a 200°C oven, with a quick spray of water, brings the crackle back for maybe half an hour before it toughens again. Freezing on the day of baking works better than keeping one overnight: bagged, it holds a month and comes back from frozen in a hot oven in six to eight minutes. Filled rolls soften quickly as the filling wets the shell.

Pick one up before you look at it. A real michetta weighs 60 to 90 grams and feels startlingly light, because the inside is very nearly empty: a thin shell of crumb, a papery crust and a hollow chamber in the middle. The top is stamped into five lobes around a raised central button, and the crust is pale gold and matte rather than shiny, thin enough to shatter under a thumb. That hollow comes from a stiff low hydration dough with a long biga and from proving the stamped rolls upside down.

The rosetta sold in Rome is the same roll under a different name. The Austrian kaiser roll shares the five lobed stamp but is full of crumb and often seeded and glazed. Most bakeries abroad that sell something called michetta produce a solid roll with the right shape and none of the void, which is the whole difference. Generic Italian rolls in supermarket bags are denser again and softer throughout. In Milan they cost 30 to 60 cents each and are usually sold by weight at 4 to 6 euro a kilo.

Any neighbourhood bakery in Milan, and the timing matters more than the address: aim for mid-morning or around five in the afternoon, when fresh batches come out. Bread is sold by weight, so expect 4 to 6 euros per kilo, which works out at 25 to 40 cents per roll since a kilo holds twelve or thirteen. In the historic centre it climbs to 7 euros per kilo.

Supermarket versions run cheaper, at 3 to 4.50 euros per kilo, but they are usually part-baked and finished in store: the shape survives, the hollow generally does not.

Outside Lombardy, ask for rosetta and expect similar prices. Outside Italy, be realistic: no importer can build a supply chain around a three-hour product, and rolls sold abroad as michette are solid bread in the right shape.

For reference when shopping elsewhere: a New York deli hard roll costs roughly 1 to 2 dollars each; a Portuguese papo-seco in a UK Portuguese bakery is usually 40 to 70 pence. Both are better substitutes than a bad imported michetta.

Milan, and specifically the bakeries of Porta Romana, Isola, Brera and the streets around Porta Venezia, where small independent prestinai still bake several times a day. The full ritual involves two shops: the roll from the baker, the filling from the delicatessen.

Peck, on via Spadari a minute from the Duomo, has been the city's grand food shop since 1883 and is the place to understand the range of what goes inside a Milanese roll. The covered municipal markets (Wagner, Isola, Santa Chiara) put a bakery and a salumeria under one roof, which is more efficient.

Milan is not a city that makes a spectacle of its bread, and that is part of the appeal: the michetta is an everyday object bought in seconds and eaten standing up. Watching the lunchtime queue at any decent bakery near an office district tells you more than any tasting.

If you are travelling further, the same roll appears across Lombardy and Piedmont under the same name, and across Rome and central Italy as the rosetta: in the delicatessens of Prati and around the Trionfale market, a rosetta with prosciutto is an institution in its own right.