Flour, water, salt, time
This handbook records how a handful of flour becomes bread: what protein builds, what water changes, what fermentation adds, and what the oven finishes. Each entry gives the short answer first, then the working detail — ranges, signs, and causes. Nothing here is for sale; the pages exist only to be read.
Three working entries
| Flour kind | Protein (about) | Thirst for water | Best suited to |
|---|---|---|---|
| Cake flour | 7–9% | Low | Tender, close-textured bakes |
| All-purpose flour | 10–12% | Moderate | Everyday loaves and flatbreads |
| Bread flour | 12–14% | High | Chewy, well-risen loaves |
| Whole wheat flour | 13–15% | High but slow | Hearty loaves and blended doughs |
| Rye flour | 8–10% | Very high | Dense, moist, long-keeping breads |
| High-gluten flour | 13–15% | Very high | Bagels and stiff, elastic doughs |
Flour supplies both scaffold and feed: protein builds the gluten network, starch absorbs water and feeds the yeast.
Wheat flour is mostly starch, but its character comes from two proteins, glutenin and gliadin. Wetted and worked, they link into gluten — an elastic web that traps gas. Bread flours carry roughly 12–14% protein; cake flours about half that.
Ash, the mineral residue measured after milling, marks how much of the grain's outer layers remain; European type numbers encode it. Higher-extraction flours ferment faster and taste fuller, but rise less high.
Starch works quietly. Intact granules absorb water slowly; starch damaged in milling absorbs fast and is broken by enzymes into sugars that feed fermentation — one reason two flours of equal protein behave differently.
Each entry is compiled from standard baking-science references and long-established practice, then cross-checked for internal consistency. Ranges are given as working values, not absolutes, and no claim rests on a single proprietary source. Nothing on these pages is sponsored or sold.
Sources and basis
The handbook draws on widely taught bread science and standard reference works; no single source is privileged, and no commercial ties exist.