Bread Flour vs All-Purpose Flour (Baking Test)

Bread flour usually has more protein than all-purpose flour, so it can form a stronger dough and a chewier loaf. To compare them fairly, bake two lean loaves with the same 70% hydration, ingredient weights, mixing, proofing, bakeware, and oven conditions. Judge both only after they have cooled fully; equal hydration may not show each flour at its best.

Before you begin, check that your loaf pans or Dutch oven are rated for 230°C / 450°F. A preheated Dutch oven can cause serious burns, so use dry oven mitts and a stable, heat-safe surface. Keep the bakeware and oven position consistent between samples. The goal is to find out what the flour changes, not what a different pan or bake method changes.

I use side-by-side flour tests to make sense of loaf differences that can otherwise seem random. A loaf that spreads more or has a tighter crumb is not automatically a failure; it may show how that flour behaved under the conditions of the test. The method below gives you a fair comparison and helps you decide which result suits your baking.

Flour and Bakeware Setup

This section sets the test’s controls. A controlled comparison changes one main factor: the flour. It keeps the recipe, dough size, handling, proof endpoint, oven setting, and bakeware the same, so differences in the loaves are more likely to reflect the flour rather than a change in method.

Choose the flours and prepare the test

Bread flour often lists 12–14% protein, while all-purpose flour often lists 10–12%. Ranges vary by brand and region, so check the package rather than treating these numbers as guarantees. Protein helps form gluten, the stretchy network that traps gas in dough.

For the clearest comparison, use bread flour and all-purpose flour from the same brand if available. Weigh both flours, label the doughs, and prepare each loaf separately. Use the same oven-rated loaf pans of the same material and size, or the same Dutch oven for both bakes. Do not compare one loaf baked in metal with another baked in a different material.

Baker’s percentages show each ingredient as a share of the flour’s weight. For example, 350 g water divided by 500 g flour is 70%. This makes it easier to scale the recipe while keeping the formula consistent.

Use a scale for the ingredients. Even small measuring differences can change dough firmness, especially when comparing two flours. Record the room temperature and dough temperature as well. Key takeaway: keep the flour as the only planned change.

Controlled Mixing, Proofing, and Baking

This section explains how to mix and bake the loaves without letting timing or handling distort the comparison. Match the doughs by their development and appearance, not only by the clock. Flour can affect how dough feels and how quickly it ferments, so record elapsed time while using visual cues to decide when each dough is ready.

Mix, ferment, and proof to matching endpoints

Mix the two doughs using the same method and for the same amount of time. If you knead by hand, use the same surface and technique; if using a mixer, keep the speed and mixing time consistent. Record how each dough feels, including whether it seems sticky, firm, or easy to stretch. Do not add extra water to one dough in this primary test.

Shape the doughs to equal mass and similar dimensions, then proof them to a matched visual endpoint. Keep the room temperature as steady as you can. If one loaf needs much longer to proof, record that difference rather than trying to hide it. Score both loaves in the same way and at a similar depth.

Preheat the oven and bakeware consistently. Bake at 230°C / 450°F in the same oven position, using bakeware rated for that temperature. A Dutch oven should also be preheated the same way for both loaves. Bake until the center reaches 96–99°C / 205–210°F, checking with a thermometer. Record the bake time; do not use time alone as proof that the loaves are done.

Key takeaway: match the dough’s proof state and final center temperature, and record time as an observation rather than a target.

Cooling, Cleaning, and Test Repeatability

Cooling is part of the test, not a pause to skip. As bread cools, steam escapes and the crumb sets. Slicing one loaf warm and the other cool can make their texture and moisture seem different, even when the real difference comes from the unequal cooling.

Cool fully and keep the next test consistent

Remove each loaf from its bakeware safely. Cool both on a wire rack until they reach room temperature before slicing. The time needed depends on loaf size and conditions, so use the same endpoint rather than relying on a fixed number of minutes. Avoid judging the crumb right after baking: it is still hot and may seem moist or gummy before it has set.

Record each loaf’s baked mass after the same cooling period. Compare loaf height, crust color, and shape. Then cut slices of similar thickness and examine the crumb. Repeat the comparison after the same storage interval if you want to assess how the loaves change over time. Keep storage conditions alike, such as using the same type of bag or container.

For a repeat test, use the same ingredients, bakeware, mixing method, and endpoints. If you change hydration, loaf size, or proofing conditions, record that as a separate test. Cool bakeware before washing, and follow its maker’s care instructions. Key takeaway: compare equal stages of cooling and storage, not just freshly baked loaves.

Serving and Side-by-Side Evaluation

This section turns observations into a useful choice. A fair test does not promise that one flour will always win. It shows how each flour performed in this recipe, at this hydration, with this process, so you can choose based on the loaf you want.

Record differences without overreading them

A stronger dough may hold its shape more firmly, and a loaf made with bread flour may have a chewier bite. But flour brands differ, and the same flour can behave differently in another recipe. Do not treat a single loaf as proof that one type is always better.

If you want each flour’s best possible loaf, run a second test and adjust hydration as needed. Keep the rest of the method steady, and label this as a hydration-adjusted comparison. Do not mix those results with the primary test, since changing the water changes the dough as well as the flour.

Conclusion: use the fixed-hydration test to compare flour under matched conditions. Then, if needed, adjust water in a separate round to see how each flour performs when the dough is tuned for it.

Frequently Asked Questions

These answers cover common choices and test problems. Keep the distinction between a controlled comparison and a best-loaf recipe in mind: the first holds hydration steady, while the second may adjust water to suit the flour. In either case, change one factor at a time and compare cooled loaves.

Can I use all-purpose flour instead of bread flour for a lean loaf?
Yes. It can make a good loaf, though the dough may feel less strong and the crumb may be less chewy. Results vary by brand and recipe.

Does bread flour always make taller bread?
No. Protein level is only one factor. Mixing, fermentation, shaping, proofing, and baking also affect height.

Why use 70% hydration for both flours?
It provides one fixed water level for a fair primary comparison. It may not be the ideal hydration for both flour types.

Should I add more water to the bread flour dough?
Not during the controlled test. Try extra water only in a separate, hydration-adjusted test.

Should both doughs rise for the same amount of time?
No. Match their visible fermentation and proof state, then record how long each takes.

Can I bake the loaves in different pans?
For a fair comparison, use the same bakeware or identical pans made from the same material and size. Different pans can affect baking.

What temperature should the loaf reach inside?
Aim for 96–99°C / 205–210°F at the center. Check with a food thermometer rather than relying only on bake time.

When should I slice the loaves?
Wait until both are fully cooled to room temperature. Warm bread can have a soft, unsettled crumb that makes comparison unreliable.

Can I use a Dutch oven for this test?
Yes, if it is rated for the set temperature. Preheat and use it the same way for both loaves, taking care with hot cookware.

Which flour should I choose for future baking?
Choose based on the texture you prefer and how the flour performs in your recipe. For a more tailored result, compare each flour again at a hydration that suits it.

(This article was written by one of our staff writers, Andrew P. Morrison. Visit our Meet the Team page.)