Tangzhong starts with the formula
A correct subtraction can still leave your dough too stiff. Tangzhong is a cooked portion of flour and liquid, returned to the bread dough after cooling. It can support a soft crumb, but both the paste allocation and the total liquid need attention.
For a first wheat-bread trial, about 5% of total flour, cooked with five times its weight in liquid, is a useful reference. Around 65°C helps guide cooking; smooth, visible thickening matters as well. These are starting points, not a formula for every flour.
What changes when the flour is cooked?
Heating flour with water or milk gelatinizes some starch. The swollen granules hold water differently from uncooked flour. This can improve moisture retention and slow crumb firming, depending on the bread formula.
Staling is more than drying: starch retrogradation and water redistribution also matter. Tangzhong does not stop these processes or replace good baking and storage. For the broader relationship, see flour water absorption and dough hydration.
Allocate the paste without counting ingredients twice
Here is a calculation for an original formula with 500g flour and 325g liquid:
| Portion | Flour | Liquid |
|---|---|---|
| Original total | 500g | 325g |
| Tangzhong at 5% flour | 25g | 125g |
| Main dough after subtraction | 475g | 200g |
The totals remain unchanged. This is an accounting example, not a tested complete recipe or proof that 325g liquid will be enough. If the liquid is water, the starting hydration is 65%; milk or eggs contain solids as well as water.
Adding the paste on top of every original ingredient would instead give 525g flour and 450g liquid. That accidental change can make the dough sticky and weak. A deliberate liquid increase is a different decision and should be written into the total formula before subtracting the paste quantities.
Cook until smooth and thick, then cool
Whisk the flour and cold liquid together before switching on the heat. Use low to medium heat and stir continuously, including around the base. Stop when the paste thickens smoothly and the whisk or spatula leaves a brief trail; about 65°C is a guide rather than an exact universal boundary.
Do not cook it into a dry lump. Excess evaporation changes the measured liquid; for a small overcooked batch, starting again is often clearer than guessing how much water was lost.
Transfer from the hot pan and protect the surface from drying. Let the paste cool to a temperature compatible with the dough you are making. Hot paste can overheat yeast and raise final dough temperature; refrigerated paste can lower it. Mix it with the wet ingredients, followed by the remaining allocated flour and liquid.
Assess total hydration separately
Cooked starch can make the dough feel firmer at the same total liquid. Subtracting the paste ingredients prevents double-counting; it does not mean that the liquid total must stay fixed.
King Arthur’s conversion guide uses about 75% recipe liquid relative to flour for its soft wheat breads. That is a reference for that approach, not a target for every milk, wholemeal or enriched dough. Research on gelatinized brown wheat flour also found that more water was needed for suitable consistency.
If you increase liquid, record the new total first. You can hold back part of the remaining liquid and add it gradually during mixing. That reserve is already counted; an addition beyond it changes the formula again. Judge the dough after it has combined and developed, not in the first few seconds.
Choose a bread that benefits from softness
Milk bread, sandwich loaves, soft rolls and cinnamon buns fit this aim. Tangzhong is less obviously useful when your priority is a very crisp crust and an open, rustic crumb. Wholemeal flour needs its own assessment because bran and composition affect absorption.
Milk can supply the paste liquid when it is already in the recipe. Its proteins, sugars and fat also affect flavour, browning and softness; do not attribute every difference to cooked starch.
Tangzhong does not replace yeast or sourdough starter. Fermentation still depends on leavening activity, time, dough temperature and ingredients. Extra benefit with sourdough is recipe-dependent rather than guaranteed.
Compare cooled bread and the next-day crumb
Keep other ingredients and processing comparable while testing the necessary liquid adjustment. Record dough handling, loaf volume, fully cooled crumb softness and the next-day texture.
Cool the bread completely before protecting it from drying. For longer keeping, consider freezing and follow the guide to storing bread to keep it soft. Slower crumb firming is not protection against mold or an unlimited storage life.
Diagnostics
Common problems and solutions
Lumpy tangzhong
Cause: Poor cold mixing or overly rapid heating.
Solution: Firm floury lumps remain in the paste. For the next batch, whisk flour and cold liquid smooth before heating gently with constant stirring.
Very hard, dry paste
Cause: Excessive heating and evaporation.
Solution: A dry lump gathers around the spatula rather than a smooth gel. For a small batch, remake the paste and stop when it visibly thickens.
Unexpectedly stiff dough
Cause: Water held in the gel or a flour with higher absorption.
Solution: If allocation is correct but developed dough stays too stiff, check total hydration. Add reserved liquid first, then make any necessary extra addition gradually and record the new total.
Much stickier, weaker dough
Cause: Paste added on top of all original ingredients or excessive extra liquid.
Solution: Add up the full formula. Recalculate the allocation and any intended hydration change; do not hide the error by adding flour blindly.
Good bread deteriorates quickly in storage
Cause: Drying or unsuitable storage despite using tangzhong.
Solution: If the cooled crumb was good initially, review storage. Cool completely, protect from drying and consider freezing for longer keeping. Tangzhong does not establish mold protection.
Technical terms
Terms worth understanding
- Tangzhong
- A portion of flour and liquid cooked together to gelatinize some starch before mixing the main dough.
- Water roux
- An English name for tangzhong; it is not a classical flour-and-fat roux.
- Starch gelatinization
- Heating starch with water so granules swell and the mixture thickens.
- Starch retrogradation
- Reorganization of starch molecules after baking, contributing to crumb firming during storage.
- Yudane
- A related flour-scalding method using very hot or boiling liquid, with a different process and typical ratio.
Frequently asked questions
Answers to common questions
How much flour should go into tangzhong?
About 5% of total flour is a useful first allocation. Common guidance describes 5–10%, but this is not a universal optimum.
Is a 1:5 ratio compulsory?
No. It is a common flour-to-liquid ratio by weight, not a constant for every flour or formula.
Must it reach exactly 65°C?
No. Around 65°C is a practical reference. Also check for a smooth thick paste with a brief spatula trail.
Can conversion need more water?
Yes. Subtract paste ingredients from the chosen formula, then distinguish that allocation from a planned hydration increase. A low-hydration recipe may need more liquid; record it rather than adding the whole paste on top.
Can I use milk?
Yes, when it is part of the recipe liquid. Milk also contributes proteins, sugars and possibly fat, so its weight is not all water and its effects are not solely due to tangzhong.
Does it work with sourdough?
It can be included, but extra softness is not guaranteed. King Arthur found no texture or keeping improvement in three tested sourdough recipes; those trials do not prove that every formula behaves alike.
Is yudane the same technique?
No. Tangzhong cooks flour and liquid together; yudane scalds flour with very hot or boiling liquid, often at a thicker 1:1 ratio. Use the intended method’s formula.