Food Science: The Anatomy of a Pie Crust (2024)

Emma Christensen

Emma Christensen

Emma is a former editor for The Kitchn and a graduate of the Cambridge School for Culinary Arts. She is the author of True Brews and Brew Better Beer. Check out her website for more cooking stories

updated May 3, 2019

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Food Science: The Anatomy of a Pie Crust (1)

While you’re busy dreaming up delicious pies to serve at your holiday dinners – or submit to our Best Pie Bake Off! – we thought we’d give you a tour of the part of the pie that sometimes gives us trouble (or nightmares): the crust!

At its most basic, pie crust is nothing more than flour, fat, and liquid. But if that’s all it is, why is pie crust so notoriously difficult to make by hand? Let’s take a look:

Flour: Flour is there for strength, structure, and elasticity. It’s the binder that holds the other ingredients together and, well, makes the pastry a pastry! For pie crusts, we usually use regular all-purpose flour instead of cake or pastry flour because we want some gluten development for structure, but not too much.

Remembermechanical action creates gluten, so it’s important not to over-handle the dough.

Fat: You can use butter, vegetable shortening, lard, or even oil in pie crust, each to a different effect. Butter provides the most flavor and a wonderful melting quality in the mouth, but it tends to not make the most tender pastry. Shortening and lard make a very tender pastry, but don’t always have the best flavor for a sweet pie.

Also, if the fat is left in large pieces, the crust will be more flaky. If it’s incorporated into the flower more thoroughly, the crust will be tender and crumbly.

Liquid: The liquid in a pie crust creates the steam that lifts the pastry and creates flakes. It also gets absorbed into the flour, helping to create gluten. Too little liquid and the dough won’t hold together, but add too much and you’ll end up with a rock-hard crust!

Salt: It might sound odd to have salt in a sweet pie crust, but a pinch or two actually helps boost the flavor without making the crust taste salty.

Sugar: Not all pie crusts have sugar, but those that do will be more tender since sugar interferes with gluten development. In our experience, sugar can also make the pie dough so tender that it’s hard to roll out and transfer to your pan without breaking.

Egg: This makes the dough more pliable and easy to roll out. Eggs also make the crust more compact.

Acid and Alcohol: Both acid and alcohol tenderize pie dough, make it easier to roll out, and prevent it from shrinking in your pan. If these things give you trouble, try substituting a teaspoon of the liquid with lemon juice or a tablespoon or two with liquor. Vodka is often used because it won’t affect the flavor of the dough.

Do you have a favorite recipe for pie dough?

(Image: Flickr member Lisuebie licensed under Creative Commons)

Food Science: The Anatomy of a Pie Crust (2024)

FAQs

Food Science: The Anatomy of a Pie Crust? ›

Liquid: The liquid in a pie crust creates the steam that lifts the pastry and creates flakes. It also gets absorbed into the flour, helping to create gluten. Too little liquid and the dough won't hold together, but add too much and you'll end up with a rock-hard crust!

What is the anatomy of a pie? ›

Pies are defined by their crusts. A filled pie (also single-crust or bottom-crust), has pastry lining the baking dish, and the filling is placed on top of the pastry but left open. A top-crust pie has the filling in the bottom of the dish and is covered with a pastry or other covering before baking.

What is the chemistry of pie crust? ›

Pie crust has one of the shortest ingredient lists: Flour + a little Salt and Sugar + Fat + Water. When flour and water come together the result is a complex network of gluten proteins.

How to make the perfect pie crust according to science? ›

Gluten is what makes bread soft and stretchy – it's desirable in bread, but not in pie dough. Rather, pie dough should be flaky and tender! So, it's important to use cold butter and ice water with your flour, as the coldness interrupts gluten development. Try to not handle the dough too much when mixing.

What is the science behind flaky pie crust? ›

Once it's in the oven, that butter goes from solid to liquid, and the water that separates out turns to gas, which forms air pockets to create flake,” UCLA food scientist and pie expert extraordinary Amy Rowat told Popular Science in 2015.

What is the structure of pie? ›

PIE Structure

A PIE paragraph opens with a main point that your paragraph will discuss, then gives information to support that point, then ends with an explanation of the information.

What is a pie crust called? ›

What is pâte brisée called in English? There are several English names for the pastry dough called pâte brisée in French. In the U.K., it is called shortcrust pastry, a nod to its short or crumbly texture. In the U.S., it is generally called pie pastry or pie dough because it is most often used for pies.

What is the science behind pie making? ›

During baking, chemical reactions occur that transform the raw ingredients into a delicious pie. The Maillard reaction, responsible for browning, adds depth of flavor to the crust. Meanwhile, the pectin in fruits thickens the filling as it cooks, creating a luscious texture.

What is the number 2 most important thing when making pie crust? ›

#2—Add cold water

Before you start making the dough, fill a glass with ice and water. Add the ice water gradually to the dough, about one tablespoon or so at a time, and stop when the dough is just moist enough to hold together when a handful is squeezed.

What is the most important rule in making a pie crust? ›

PIE DOUGH RULES

As important as not overmixing is staying chilled, literally!! That means keeping all elements cold— your counter, ingredients, hands, heart (just kidding!). No, but seriously, cut up your butter into little cubes and chill them before you incorporate them into the flour.

Why cut slits in pie crust? ›

With docking, the holes allow steam to escape, so the crust should stay flat against the baking dish when it isn't held down by pie weights or a filling. Otherwise the crust can puff up, not only impacting appearance but also leaving you with less space for whatever filling you have planned.

What's the difference between pie crust and pastry crust? ›

One of the major differences between the two is the consistency of the crust. While pie crusts are very flaky and light, tart crusts or pastry crusts, tend to be firm and crumbly and not at all flaky.

What causes pie crust to fall apart? ›

The pie dough is too dry!

There are two very important things to point out in those few words– “cold” water and “just until flour is moistened.” It's critical to use cold water to keep the butter cold. The butter should stay firm so it doesn't soften and combine with the flour.

What are the parts of pies? ›

University: Passaic County Community College
  • The two main components of pies are the dough and the filling.
  • Raw pie shells are filled and then baked.
  • Fruit pies contain fruit fillings and usually have a top crust.
  • Soft pies are those with custard-type fillings, that is liquid, liquid fillings that become firm.

What are the four sections of pies? ›

PIES are the four areas of a child's development- physical, intellectual, emotional, and social. Each of these areas is important to a child's overall development and a parent should engage their children in the PIES every day.

How do you describe a pie diagram? ›

A pie chart is a type of graph representing data in a circular form, with each slice of the circle representing a fraction or proportionate part of the whole. All slices of the pie add up to make the whole equaling 100 percent and 360 degrees.

What are the divisions of a pie? ›

The pie chart is divided into sectors for representing the data of a particular part out of the whole part according to the measurements. Pie charts also called pie diagrams, represent each sector or slice as the proportionate part of the whole.

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