Why the Case Makes the Tart

A tart is only as good as the shell that holds it. You can whisk the silkiest crème pâtissière in Christendom, but if your pastry case is pale, soggy or shrunken, the whole thing collapses on the plate. In French baking the case is not a vehicle — it is half the pudding. A properly baked pâte sucrée should shatter cleanly under a fork, taste faintly of butter and vanilla, and hold its shape for hours after the fruit goes in. The good news is that none of this requires years at a Parisian bench. It requires a cold dough, a well-lined tin and a patient twenty minutes in the oven.

Start With Dough That Wants to Behave

Most pastry problems begin long before the oven. For a sweet case, pâte sucrée is the workhorse: around 250g plain flour, 150g unsalted butter, 90g icing sugar, a pinch of fine salt, one whole egg and one yolk. Rub or pulse the butter into the dry ingredients until you have something resembling coarse sand with a few pea-sized flecks left in — those flecks are what give you flakiness. Add the egg gradually and stop the moment the dough comes together; if it looks slightly ragged, it is ready.

• Keep the butter cool but not rock-hard. Around 16-18°C is the sweet spot. Fridge-cold butter shatters into the flour and tears your dough; soft butter greases it into a biscuit.
• Flatten before chilling. Shape into a disc no thicker than 2cm, wrap in cling film and rest for at least 30 minutes. Overnight is better — the gluten relaxes, and relaxed gluten shrinks less.
• Use icing sugar, not caster. Icing sugar contains a little starch, which keeps the dough tender and slows browning at the edges.
• Weigh your flour properly. Scooping straight from the bag can add 20% extra, and that extra flour is what turns delicate pastry into cardboard.

Lining the Tin Without Tears

Roll your dough between two sheets of baking parchment, lifting and rotating it a quarter turn every few rolls so it does not stick. Aim for a 3mm thickness — thin enough to bake crisply, thick enough to survive lifting. Roll to a circle roughly 4cm wider than your tin, then drape it over the rolling pin and lower it into the tin.

Now, and this is the part most bakers rush: ease the pastry into the corners rather than stretching it. Press it gently into the fluted sides with a small ball of spare dough dipped in flour, working from the centre outwards. Never pull. Stretched pastry will spring back the moment it hits the heat. Trim the excess with a sharp knife, leaving a 5mm overhang if you like, as it will shrink up to the rim during baking. Prick the base all over with a fork, then chill the lined tin for at least 20 minutes. Cold pastry holds its shape; warm pastry does not.

Blind Baking, Stage by Stage

Blind baking simply means baking the case empty so it sets firm before any wet filling arrives. Line the chilled pastry with a large piece of crumpled baking parchment — crumpling lets it follow the curves — and fill right to the top with ceramic baking beans, dried rice or pulses. Fill generously: if the sides are unsupported, they will slump.

• Stage one: bake at 190°C (170°C fan) for 15-18 minutes, until the rim is set and barely coloured.
• Stage two: lift out the parchment and beans and return the case to the oven for 5-8 minutes, until the base is dry to the touch and the colour is a pale biscuit gold.
• For a wet filling (fruit, custard, frangipane), brush the hot base with beaten egg white or a thin layer of melted dark chocolate and return it to the oven for 2 minutes. This seals the pastry and keeps your base crisp for days.
• For a fully baked tart, carry on until the pastry is a deep, even gold — around 20-25 minutes in total. Underbaked pastry will never crisp up later.

Why Cases Shrink, Slump and Turn Soggy

Almost every fault has a cause you can fix next time.

• Shrunken sides usually mean overworked dough, too little resting, or pastry that was stretched rather than eased. Handle it less, rest it longer, chill it in the tin.
• Slumped sides are almost always about under-filled beans or a tin greased too heavily, letting the sides slide down.
• A soggy base comes from skipping the second bake or pouring a hot, wet filling into an unsealed case. Always seal, always cool the filling.
• A blond, flabby centre means your oven is running cool. Buy an oven thermometer; domestic ovens routinely sit 15-20°C below the dial.
• Cracked or bubbled bases are the result of too much liquid in the dough or baking on a shelf that is too high. Bake on the middle shelf, never the top.

Storing and Reviving Your Case

A blind-baked case will keep in an airtight tin for three days, or wrapped and frozen for a month — a genuinely useful thing to have on standby. If it softens after a day with filling, a five-minute spell in a 160°C oven will bring the crunch back. Dark metal tins conduct heat fiercely and can blacken a thin base, so if yours is dark, drop the temperature by 10°C and check early. Ceramic and pale metal tins give a slower, more even bake and are kinder to a first attempt. Whatever you use, let the case cool completely in the tin before you lift it out — warm pastry is fragile, and those five minutes of patience will save you a cracked rim and a crossed word.