Grilled Peaches with Amaretti and Mascarpone

Every so often a pudding arrives that asks for almost nothing and gives back a great deal, and this is one of them. Ripe peaches, a hot grill, some crushed amaretti and a bowl of mascarpone: that is the whole shape of it, and it comes together in the time it takes the coffee to brew after dinner. I make it all through peach season, and I make it for people I want to impress precisely because it looks like far more effort than it is.

The magic is heat against fruit sugar. A raw peach at its August peak is a wonderful thing, but a grilled one is a different, deeper pleasure: the surface sugars caramelise into a bittersweet crust, the flesh softens and floods with juice, and a faint smokiness settles over everything. Add cold, faintly tangy mascarpone and the crunch of amaretti and you have contrast on every axis, warm against cold, soft against crisp, sweet against a savoury nuttiness. It is Italian in spirit, the sort of thing you would be served on a terrace, and it barely qualifies as cooking.

Peaches, fire and the Italian instinct

Grilling stone fruit is an old Mediterranean habit, born of the sensible logic that if you already have a fire going for supper, the peaches may as well have a turn on it. In Italy, baked and stuffed peaches — pesche ripiene, filled with crushed amaretti and cocoa — are a classic of the Piedmontese table, and this dish borrows that pairing and speeds it up. The affinity between peach and amaretto is not an accident. Amaretti carry the flavour of bitter almond, which comes from the same aromatic compound, benzaldehyde, found in the kernel inside a peach stone. Almond and stone fruit are, botanically, close cousins, both members of the Prunus family, and your palate registers that kinship as a kind of rightness. It is the same logic behind Bakewell tart with frangipane and raspberry, where almond and tart fruit lean on each other.

Choose your peaches with care, because they are most of the dish. You want them ripe enough to smell fragrant at the stem end and to give slightly under a thumb, but firm enough to hold their shape on the grill. A rock-hard peach will not caramelise or soften properly; an over-ripe one will collapse into the bars and stick. Freestone varieties, where the flesh releases cleanly from the stone, make life much easier. Nectarines work just as well and are, if anything, more forgiving because their firmer flesh grills neatly. Out of season, this is not the dish to attempt; a pallid supermarket peach in March will taste of nothing no matter how hard you char it.

The clever bit: brown the butter for the crumble

Amaretti crushed over cream is already a lovely thing. What lifts this version is browning the butter before the biscuits go in. Butter is roughly a fifth water and a small amount of milk solids, and when you heat it past the point where the water boils off, those milk proteins toast and turn the fat nutty, caramel-scented and gold. Toss the crushed amaretti through that hot brown butter and two things happen: the biscuits pick up a deep, roasty, almost butterscotch note, and as the mixture cools it clumps and crisps into little clusters that stay crunchy against the cream.

It takes an extra three minutes and a bit of attention, because brown butter turns to burnt butter in a matter of seconds once it hits colour. Keep the heat moderate, swirl the pan, and pull it off the moment it smells like toasted hazelnuts and the flecks at the bottom are the colour of a conker. The pinch of flaky salt stirred in at that point is what makes the crumble taste like a proper salted-caramel thing rather than merely sweet. If you love that browned-butter depth, you will recognise it from browned-butter and pecan blondies; it is one of the great cheap upgrades in a home kitchen.

The mascarpone, and why cold matters

Mascarpone is a fresh Italian cream cheese, rich and mild, and it needs very little help. Beat it cold, straight from the fridge, with icing sugar for sweetness, vanilla for warmth and a squeeze of lemon to cut the richness and stop it cloying. The lemon does real work here; without a little acid the mascarpone sits heavy against the sweet fruit.

The one caution is not to overbeat it. Mascarpone has a high fat content and, worked too hard or for too long, it will go from silky to grainy and eventually split into buttery curds and weeping liquid. A quick beat until it is smooth and holds a soft peak is all you want; stop the moment it thickens. Keeping it cold until the last second is deliberate, because the contrast of cold cream sliding over the warm, juicy peach is half the point of the dish.

Putting it together, and a few tips

Timing is the only thing to manage, and there is not much of it. Grill the peaches first and let them sit warm; make the crumble; beat the mascarpone; assemble at the table. Everything can be prepped an hour ahead, with the crumble kept in a dry bowl at room temperature so it stays crisp, and the peaches and mascarpone in the fridge. I would grill the peaches to order if I could, but reheated for a minute in a warm oven they are still very good.

A thread of honey over the top is optional and depends on how sweet your peaches are; a properly ripe August peach may need none at all, while an early-season one is grateful for it. Taste and decide. A little more flaky salt at the very end never hurts. One practical note on the grill itself: get it genuinely hot before the fruit goes on, and oil the peaches rather than the bars, so the sugar caramelises into a crust instead of steaming. If the halves stick when you try to turn them, they are not ready; give them another thirty seconds and they will release cleanly once the caramel has set. A cast-iron griddle indoors holds heat better than a thin nonstick pan and gives you those dark bar marks that make the plate look the part.

Variations worth trying

Swap the peaches for apricots, halved and grilled a touch more briefly, and the almond kinship gets even louder. Figs, cut in half and grilled cut side down until jammy, are gorgeous with the same mascarpone and crumble, and turn this into something you could serve well into autumn. If you would rather a cleaner finish than mascarpone, cold zabaglione with Marsala and berries spooned over the warm fruit is a more grown-up, more Italian move, and the Marsala plays beautifully against the char.

For an adult version, a splash of amaretto liqueur over the peaches as they come off the grill, or stirred into the mascarpone, doubles down on the almond theme. And if you are cooking outdoors anyway, do the peaches over real charcoal; the extra smoke is worth the walk to the barbecue. However you finish it, serve it the moment it is assembled, warm fruit and cold cream, before the crumble has a chance to soften. That short window is where the whole pleasure lives.