Difference between baking flour and all purpose flour

Take a peek in your pantry: How many kinds of flour do you have? There's probably a bag of all-purpose flour in there for your favorite baked goods like cookies, cakes, and biscuits, but what about bread flour? It's a great flour to have on hand, too—Ree Drummond uses it to make this super-easy homemade bread from Pastor Ryan. So when should you use bread flour vs. all-purpose flour and what exactly is the difference?

First things first—what is flour anyway? The most basic kind of flour in baking is wheat flour, which is made when wheat grains undergo the milling process. The grains are cleaned and tempered with water, then ground and sifted to break down the endosperm of the wheat kernel into a powder. When whole-wheat flour is made, the whole grain is used rather than just the endosperm.

All-purpose flour is the most common kind of flour—and it's the best choice when you're making a recipe that doesn't specify a certain kind. You can buy it bleached or unbleached. Bleached flour has been treated with chemical agents to speed up the flour's aging process, which is beneficial for baking purposes. Either kind is fine for most recipes—it's usually just a matter of personal preference. Bread flour is a little different—read on to find out the difference between bread flour vs. all-purpose flour and when to use them both.

What Is Bread Flour?

The main difference between bread flour and all-purpose flour is their protein content. Soft wheat flours, like all-purpose flour, are usually about 8 to 12 percent protein, while hard wheat flours, like bread flour, contain around 12 to 15 percent protein. This may not seem like a big deal, but a few percent can make a huge difference in your baked goods. More protein in flour means more gluten can develop—and gluten is what gives baked goods structure. Bakers usually prefer bread flour for things that require more body and sturdiness, such as rolls and bread—hence the name!

Does Bread Flour Rise More Than All-Purpose Flour?

Breads made with all-purpose flour will rise just fine—but those made with bread flour will have more structure, so they'll hold their shape better and rise particularly well.

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Cake flour, bread flour, pastry flour, and all-purpose flour (all made from wheat) vary primarily by the type of wheat they're made from and their protein content. This is perhaps the most interesting and certainly the most significant difference between them, especially when it comes to baking.

All About Protein

Protein content determines how much gluten the flour will form, which in turn affects the textural quality of your baked good. Flours with a high protein content create more gluten, which provides a strong and dense structure. Those with a lower protein content form less gluten (lower protein and less gluten get you a light and airy structure-think 'LLL' for Lower protein, Less gluten, Light texture). Let's take a closer look at each of these four flours-from high to low protein content—and chat about the best uses and substitutions.

Bread Flour

With a protein content of approximately 14 to 16 percent, this high-gluten flour is a blend of 99.8 percent hard-wheat flour with a touch of malt barley added to improve yeast activity, plus vitamin C or potassium bromate, which increases gluten's elasticity. In short, it's your go-to flour for yeast breads, which are breads that use yeast as a leavening agent (brioche, croissant, French bread, and sourdough, for example).

Can you use all-purpose flour as a bread flour substitute (and vice-versa)? Yes, you can absolutely make a 1:1 substitute. For 1 cup bread flour, use 1 cup all-purpose, and vice-versa (note that bread and pizza crust made with all-purpose flour may have a little less chew than those made with bread flour, but results will still be good). If you want to try using bread flour as a substitute for all-purpose flour in recipes for yeast doughs that call for all-purpose flour, your breads and pastries will get a welcome extra little lift. You can try using bread flour as a substitute for all-purpose in our No-Knead Onion Rolls.

All-Purpose Flour

This is the flour you probably know very well and (unless you are gluten-intolerant) likely love. Made from a blend of high-gluten hard wheat and low-gluten soft wheat, it's terrific for everything from our favorite Pancake Recipe, Sugar Cookies, and Classic Chocolate Layer Cake, to dredging chicken for Oven Baked Chicken Tenders or Hot Chicken Tacos With White Sauce Slaw, and more.

All-purpose flour (or AP Flour, as it's known in chef speak) is a fine-textured flour with an approximate protein content of 10 to 12 percent. This flour comes in two forms, bleached (which is flour that is bleached by a chemical process) and unbleached (which is flour that is indeed bleached, but is bleached naturally as it ages). Generally speaking, recipes that call for all-purpose flour are best made with such. If you happen to have leftover bread flour, you can use bread flour in place of AP flour (at a 1:1 ratio), for yeast doughs, like the ones mentioned under Bread Flour above.

Pastry Flour and Cake Flour

While these two flours aren't the same, they are both fine-textured soft flours with a low protein content-pastry flour clocks in at approximately 9 percent protein, while cake flour is even lower, with a protein content of about 7 to 8 percent. These flours have just enough protein to give structure to cakes and other tender-crumbed baked goods, while keeping texture deliciously airy and light.

In a pinch, you can pretty easily and successfully substitute AP flour for cake flour and pastry flour, by using this ratio: For every 1 cup of cake or pastry flour called for in a recipe, measure 1 cup of AP flour, then remove 2 tablespoons (this will leave you with 7/8 cup of AP flour, also known as a scant cup, which you can alternatively measure by eye). Add 2 tablespoons cornstarch to your scant cup of AP flour and poof!-you're good to go.

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