Gelato

Gelato is a frozen mixture of milk, sugars, a modest amount of cream and, depending on the school, egg yolk, churned as it freezes. The churning shears ice crystals before they grow large enough to feel gritty, and folds in air. That process, mantecatura, is the whole craft; the rest is arithmetic.

Three measurements separate gelato from American ice cream, and they are worth memorising because they are the only honest answer to the question everyone asks. Fat: artisan gelato sits between 4 and 8% butterfat, while US federal standards require a minimum of 10% for a product to be labelled ice cream, and premium lines run to 16-18%. Air, which the trade calls overrun: 20-35% in gelato, 50-100% in industrial ice cream. An American tub can legally be half air by volume. Serving temperature: a gelateria display runs at -11 to -14°C, a home freezer at -18°C.

Every difference you can taste follows from those three. Less fat means aromatic compounds are not trapped in a lipid film on the palate, so the pistachio tastes more of pistachio. Less air means more product per spoonful, which the mouth reads as density. A warmer serving temperature means your taste buds are not partly numbed and the mass is plastic rather than solid, which is why gelato is served with a flat spatula and ice cream with a round scoop.

Two base families underpin everything: base bianca, eggless, built from milk, cream, sugars and skimmed milk powder, which carries delicate flavours and the whole Sicilian tradition; and base gialla, with egg yolk, richer and more structured, commoner in the north.

Much more direct than ice cream. With less butterfat to coat the tongue, flavour arrives immediately and leaves cleanly instead of lingering as a creamy film: a good hazelnut gelato tastes of roasted hazelnuts and almost nothing else.

The texture is the surprise for most first-timers. It is denser and heavier than expected, and you can feel the weight in a small cup, but softer, closer to a thick custard than to something you have to chip at. It should yield instantly to the spoon and start collapsing within a couple of minutes on a warm day. Anything holding a rigid sculpted shape in the sun was engineered to do so.

Sweetness is moderate: Italian balancing targets 16-22% total sugars, much of it dextrose chosen for freezing point rather than sweetness.

Serve it at -11 to -13°C. Straight from a home freezer at -18°C it is too hard and too cold to taste properly; fifteen minutes in the fridge, not on the counter, brings it into range. It should give under a spatula without running, and use a flat spatula rather than a round scoop, because Italian service smears and folds the gelato instead of compressing it into a ball.

The affogato is the one preparation worth learning: two spoonfuls of fiordilatte or hazelnut in a chilled cup, one short espresso pulled and poured over at the table. Roughly one part coffee to two parts gelato, eaten immediately: it is a temperature contrast, not a coffee dessert, and it collapses within a minute.

Never refreeze gelato that has softened completely. Beyond the ruined texture, a thawed milk base is a growth medium, and refreezing does not undo that.

Gelato is built to be eaten within days of churning, not stored, which is why gelaterie make small batches daily. A sealed tub from a shop keeps its texture best for about a week in a home freezer, kept at the back rather than in the door. Press a sheet of baking paper or foil directly onto the surface before putting the lid back on: the air gap under a lid is where ice crystals form. Commercial tubs carry a date, and that date, with the maker, is the reference.

The change over time is physical and one directional. Water migrates, refreezes into larger crystals and the texture goes from smooth to sandy; the surface dulls and dries, a hard skin forms, and freezer smells transfer into a fat rich base easily. Fruit sorbets crystallise faster than milk bases because there is nothing to hold the water. Every partial thaw and refreeze accelerates all of it, so take out only what you will serve and return the tub straight away. Once a batch has softened all the way through, refreezing rebuilds the crystals rather than the gelato.

Two tells work anywhere. Colour first: real pistachio is a muddy khaki brown, not fluorescent green, and banana is grey beige rather than yellow, because fruit browns and nothing has been added to stop it. Then the display. Gelato piled into tall glossy peaks has been whipped full of air and held up by emulsifiers; the traditional set up is flat metal trays under lids, or covered pozzetti, steel wells sunk into the counter where nothing is visible at all. A shop that hides its gelato is usually confident about it.

Gelato and ice cream are different formulas, not translations. Gelato runs roughly 4 to 8 percent butterfat against 10 to 18 for American ice cream, carries less whipped in air, and is served around minus 12 rather than minus 18, which is why it tastes denser and more intense. Outside Italy the word is a marketing term with no legal weight, so a supermarket tub labelled gelato may be ordinary ice cream. Look for produzione propria or artigianale on the sign, a posted ingredient list, and a short seasonal flavour board rather than forty tubs year round.

Buy it from a gelateria and eat it within the hour: that is what it is built for. In the US, Italian-style shops in New York, Boston, Chicago, San Francisco and Los Angeles sell small cups at 6 to 9 dollars and packed pints at 10 to 16, roughly 18 to 28 dollars a pound. Supermarket pints labelled gelato are usually American ice cream in a smaller tub: check the butterfat and the net weight in grams rather than the volume.

In the UK, London has a real gelateria scene in Soho, Clerkenwell and Islington, and Italian delis and Ocado carry imported tubs. Expect 3.50 to 5.50 pounds for a small tub and 28 to 45 pounds a kilo packed.

The most useful trick in a supermarket freezer is to compare net weight against volume. A 500 ml tub weighing 250 grams is 100% overrun: half of what you are paying for is air. The same tub at 400 grams is dense, low-overrun product, whatever the label calls it.

Sicily has the longest history and the best raw materials. Bronte, on the slopes of Etna, grows the DOP pistachio harvested in odd-numbered years that everywhere else fakes with colouring; Avola grows the almonds behind a dairy-free white gelato close to the Arab original. In Noto, Caffè Sicilia has spent decades working fruit, jasmine and citrus in a way that shaped the whole category. Between Catania and Acireale, gelato in a brioche is a normal breakfast.

Milan is the urban counterweight: a dense, competitive scene around Porta Venezia, Isola and the Navigli, where old neighbourhood shops sit alongside laboratories working single-origin cacao.

Two detours reward anyone who cares about how it is made. At Anzola dell'Emilia outside Bologna, the Gelato Museum Carpigiani sits inside the factory that builds most of the world's batch freezers. And at Longarone, north of Belluno, the international artisan gelato fair fills the last week of November with the Venetian gelato-makers who run shops across Germany, Austria and the Netherlands all season and come home when they close.