Sbrisolona — the crumbly almond and cornmeal cake of Mantua

i. Origin & history

Torta sbrisolona belongs to Mantua (Mantova), the city in eastern Lombardy that was ruled for nearly four centuries by the Gonzaga family. It began, as the story usually goes, as a country cake made from what a farming household had to hand: maize flour, which spread across the Po Valley in the seventeenth century, lard rather than butter, and hazelnuts or whatever nuts were available. Over time, wealthier kitchens refined it with almonds, white flour, butter and sugar, and it became a cake worthy of a court table. The Gonzaga connection is part of the city's own telling and should be taken as tradition rather than documented fact.

The name comes from the Mantuan dialect word brisa, meaning a crumb, and the related verb for crumbling. Sbrisolona translates as something like 'the crumbly one' or 'the very crumbly cake', and it is a fair description: the finished cake shatters when you break it. Nearby areas use related names, and Mantuans themselves often call it simply la sbrisolona.

It is also known as torta delle tre tazze, the 'three-cup cake', after the old method of measuring equal cups of flour, cornmeal and sugar, and many family recipes still use equal weights of the main ingredients. Today it is a protected traditional product of Mantua, sold in every bakery in the city in large, flat rounds, often wrapped in cellophane, and it is a common Christmas gift.

Sbrisolona is not a crumble in the British sense, nor a polenta cake. There is no fruit layer underneath, and it contains no raising agent; it is closer to a giant, irregular shortbread biscuit. It also differs from the moist torta di polenta of other Italian regions, which is a soft cake made with eggs and ground almonds.

ii. Why the dough is never pressed together

The texture of sbrisolona comes from the way the dough is assembled. The fat is rubbed into the dry ingredients only until it forms uneven crumbs, and the small amount of egg yolk is added just to make those crumbs cling together in clumps. The mixture is then scattered into the tin, never kneaded or pressed into a sheet. Each clump bakes into a hard, crisp nugget, and the gaps between them become the fault lines along which the cake breaks.

Cornmeal gives the cake its gritty crunch and its golden colour. Unlike wheat flour, maize contains no gluten-forming proteins, so it adds crunch without toughness. The traditional cornmeal is fioretto, a fine grade of polenta flour; coarse polenta makes the cake hard and sandy rather than crisp.

Almonds are used both chopped in the dough and whole on top, and traditionally they are left unpeeled. The skins add a slightly bitter, toasty edge that balances the sugar. Some old recipes also include a few bitter almonds or a little almond extract to strengthen that note.

The choice of fat matters more than in most cakes. Lard, the original fat, gives the shortest, crispest crumb, because it is pure fat with no water. Butter adds flavour but contains about 15 per cent water, which develops a little more gluten and makes the cake slightly harder. Many Mantuan cooks use half lard and half butter for the best of both, and this is the version below.

iii. Ingredients

Makes 12 servings · scroll the side panel to adjust

• 150 g plain flour
• 150 g fine cornmeal (farina di mais fioretto)
• 150 g caster sugar
• 150 g skin-on almonds, plus 20 whole almonds for the top
• 75 g cold unsalted butter, diced
• 75 g cold lard, diced (or more butter)
• 2 egg yolks
• 1 unwaxed lemon, finely grated zest
• 1 tsp vanilla extract
• 1 pinch salt
• 1 tbsp icing sugar, to dust

The equal weights of flour, cornmeal, sugar and almonds are the old three-cups principle and make the recipe easy to scale. Fine cornmeal, labelled fioretto or fine polenta flour, is essential; instant or coarse polenta gives a gritty texture. Lard gives the most authentic crumb; if you prefer, use 150 g of butter in total. Chop the almonds coarsely by hand or pulse them briefly; ground almonds would make a dense, pasty cake. A few cooks add a splash of grappa or a little bitter-almond extract with the yolks.

iv. Method

1. Heat the oven to 180 °C (350 °F), conventional heat. Butter a 26 cm round tart or cake tin and line the base with baking paper.
2. Coarsely chop the 150 g of almonds into pieces about the size of a grain of rice or a little larger. Keep the 20 whole almonds aside.
3. In a large bowl, mix the flour, cornmeal, sugar, chopped almonds, lemon zest and salt.
4. Add the cold butter and lard and rub them in with your fingertips until the mixture forms irregular crumbs, from fine sand to the size of a pea.
5. Beat the yolks with the vanilla and drizzle them over the crumbs. Toss with a fork and your fingers until the crumbs start to cling together in loose clumps. Do not knead.
6. Scatter the mixture into the tin in an even layer about 1.5–2 cm deep, without pressing it down. Dot the whole almonds over the surface, pushing them in lightly.
7. Bake for 35–45 minutes, until deep golden all over and firm at the edges. The centre will still feel slightly soft but will crisp as it cools.
8. Cool completely in the tin, at least 1 hour. Lift out, dust with icing sugar and break into rough pieces at the table.

v. Tips & common mistakes

• Do not press the crumbs down. A compacted sbrisolona bakes into a solid shortbread that cuts cleanly and is far too hard. The loose, lumpy surface is the point.
• Keep the fat cold. Warm butter or lard turns the crumbs into a paste, and the cake loses its crispness.
• Bake until properly golden. Pale sbrisolona tastes floury and stays soft in the middle. The colour should be a deep honey-gold.
• Use a wide tin. A thick layer will not crisp through. A 26–28 cm tin gives the traditional flat, wide cake.
• Let it cool fully before breaking it. Warm sbrisolona crumbles into dust; cold, it breaks into clean, irregular shards.
• Do not cut it with a knife. Mantuan custom, and the texture itself, say it should be broken with the hands — or, in some homes, with a firm tap of the fist on the centre.

vi. Variations

Every Mantuan family claims its own version. Some use all butter, some all lard; some add a whole egg instead of yolks for a slightly firmer cake. Hazelnuts, which may well be closer to the peasant original, replace part or all of the almonds in some recipes. Modern bakeries sell versions with chocolate chips, dried figs or candied orange, and Mantuan restaurants sometimes serve a spoon dessert of crumbled sbrisolona with mascarpone cream or zabaione.

Its closest relatives are the crunchy almond biscuits of northern Italy — the hazelnut baci di dama of Piedmont and the Tuscan biscotti — and, outside Italy, the Scottish shortbread, which uses a similar butter-sugar-flour ratio but is pressed into a solid block.

vii. Serving & storage

Sbrisolona is broken at the table and served in rough pieces at the end of a meal, with a glass of sweet wine or grappa. In Mantua it is also dipped in or soaked with grappa, and it is a familiar sight on the table at Christmas, when it is given as a present. It pairs well with zabaione, mascarpone cream or vanilla ice cream.

Sbrisolona keeps very well. Stored in an airtight tin at room temperature, it stays crisp for two weeks. It also freezes well: wrap it whole or in large pieces in cling film and then foil, and freeze for up to three months. Thaw at room temperature in the wrapping, then crisp in an oven at 160 °C (320 °F) for 5 minutes if it has softened.

ix. More from Italian

• Zabaione — warm Marsala custard
• Baci di Dama — hazelnut 'lady's kisses'
• Ricciarelli — Sienese almond biscuits
• Fennel Seed Biscotti — twice-baked biscuits
• Shortbread — Scottish butter biscuit
• Boterkoek — Dutch butter cake