A great pie crust is mostly a ratio problem. Flour gives structure, fat gives tenderness and flake, and water brings the dough together. Change the balance and you change the crust completely, from shattering and flaky to crumbly and mealy. This calculator scales the classic ratios to your dish size, so a small tart and a deep family pie both get the right weights.
Flaky crust uses a flour to fat ratio of about three to two by weight, with water at about one third of the flour weight. The fat stays in visible pieces, and those pieces melt in the oven to create steam pockets that lift the dough into layers. Keep everything cold and handle the dough as little as possible, because warm fat blends in and the layers disappear.
Mealy crust uses more fat and less water than flaky crust. The fat coats the flour more completely, so the baked crust feels tender and almost sandy rather than layered. This style suits custard and cream pies, where a sturdy crust that does not go soggy matters more than dramatic flake. It also rolls out more forgivingly for beginners.
Tender short crust sits between the two, with a high fat share and the least water. It tastes rich and melts in the mouth, which works well for fruit tarts and small hand pies. The trade off is fragility, so roll it between parchment sheets and chill it in the tin before baking to keep its shape.
Dish size changes the flour weight faster than most bakers expect. Doubling the diameter quadruples the area, so a 30 centimetre dish needs far more dough than a 20 centimetre one. The calculator uses the square of the diameter, which keeps the thickness of the crust constant instead of letting it get thinner as the dish grows.
A double crust needs about 80 percent more dough than a single crust, not twice as much, because the top crust is usually rolled thinner and trimmed less generously. The calculator applies that factor automatically when you choose a double crust, so you will not end up with a large pile of leftover dough or a top that runs short.
Cold fat is the single most important habit in pie dough. Cut butter or shortening into cubes and chill them, use ice water, and chill the dough for 30 minutes before rolling. Warm dough sticks, tears and loses its layers. If the dough softens while you work, put it back in the fridge for ten minutes rather than fighting it.
Salt at one percent of the flour weight seasons the crust without making it taste salty. It also strengthens the dough slightly, which helps the crust hold its shape in the tin. Add it to the flour before the fat so it spreads evenly, and reduce it only if your filling is already very salty.
Blind baking protects wet fillings. Line the chilled crust with parchment, fill with baking beans, and bake until the edges set before adding a custard or fruit filling. Without this step, steam from the filling soaks the base and no amount of extra baking time will crisp it again.
Leftover dough is useful, not waste. Gather scraps gently without overworking them, chill, and roll them into cinnamon twists or small jam tarts. Re-rolled dough is always a little tougher than the first roll, so treat it as a bonus bake rather than a second pie crust.
A worked example shows the ratio in action. A single flaky crust for a 23 centimetre dish needs 200 grams of flour, 132 grams of cold fat, 66 millilitres of ice water and 2 grams of salt. Those weights look small next to cup measures, but they bake into a crust that is crisp, layered and strong enough to slice cleanly.
Butter, shortening and lard each change the crust. Butter tastes the best and browns beautifully, shortening gives the flakiest texture but little flavour, and lard makes a wonderfully tender crust for savoury pies. Many bakers split the fat half butter and half shortening to get both flavour and flake in one crust.
Calculadora de Proporción de Grasa para Masa de Tarta – Fórmula Crujiente por Molde