S2-C1: Tangzhong white bread

S2-C1 is the first soft-wheat lesson. This is not lean/artisan S1 bread: tangzhong, milk, sugar, and butter make the learning goal different.

What This Lesson Studies

The main topic is softness and water retention through tangzhong. This lesson asks whether scalding part of the flour gives a stable soft crumb and better freshness without overbrowning the crust.

Theory

Tangzhong means cooking part of the flour and water into a thick paste, around 65 °C. Starch binds water, so the bread can feel softer and stay moist longer. Milk, sugar, and butter also change flavor, fermentation, browning, and crumb structure. S2 should be judged by softness, thin crust, slicing quality, next-day freshness, and a gentle milk-sweet profile.

Full course map, currently in Russian: Bread Lab curriculum (in Russian).

What Tangzhong Changes

Tangzhong is not an aroma preferment. It is a water-management tool. A small share of flour is heated with water until starch granules swell and thicken the mixture. That paste carries water into the final dough in a less mobile form, so the baked crumb can feel softer and dry out more slowly.

The important practical consequence: do not raise total hydration just because the dough feels manageable. Tangzhong already changes how water behaves. If the loaf is wet or gummy, the next check is cooling, proofing, and bake temperature before adding more water.

Why This Is Not Lean Bread

Milk, sugar, and butter change the control logic.

Ingredient	Main effect	Risk
Milk	Adds lactose, proteins, and a softer dairy note	Faster browning and a heavier crumb if proof is weak
Sugar	Feeds sweetness and browning more than structure	Crust can darken before the centre is ready
Butter	Tenderizes and shortens the crumb	Added too early, it can slow gluten development
Tangzhong	Keeps water in the crumb matrix	If underbaked, the crumb can read as damp rather than soft

That is why S2-C1 is evaluated by softness, even slicing, thin crust, and next-day freshness, not by the open irregular crumb expected from lean hearth bread.

Shaping the Batard (in detail)

Shaping soft tangzhong dough is its own technique. The dough is around 60% hydration plus butter — firm but sticky; enriched, so butter “flows” under warm hands. The goal of shaping is a tight surface without forcing out gas and without tearing the gluten film.

1. Prep the bench (1 min)

Lightly dust the work surface with flour — literally a tablespoon, a thin film. Excess flour leaves dense “unrolled” streaks inside the crumb. Have ready: bench scraper, banneton or pan, contact film or an inverted bowl for the bench rest.

2. Transfer to the bench (1–2 min)

After bulk, the dough is stuck to the container walls. Run the scraper around the perimeter to release. Invert the container onto the bench — the dough should slide down. If it clings, help with the scraper and fingers; do not yank: a jerk tears the gas pockets and you’ll have to re-shape.

After the transfer, the dough sits as one piece with a slight slump and a matte surface. That is normal.

3. Preshape (2–3 min)

Goal — round the dough and order the structure without forcing gas out.

• With the scraper and hands, fold the edges toward the center from four sides, like a dumpling
• Flip seam-side down
• Tighten the surface: with both palms, push the dough away on the bench in small arcs, rotating it a quarter turn between motions; repeat 2–3 times
• Do not press hard — we are ordering the form, not degassing

Result: a round/oval “package” with a tight matte top.

4. Bench rest 10 minutes (not 5)

Cover the dough with contact film or an inverted bowl. A towel on top is not ideal — it abrades the surface and dries it. 10 minutes is the justified minimum for enriched dough:

• 5 minutes is too short: gluten is still under tension after preshape; final shaping will tear the film
• 10 minutes is right: gluten relaxes, the dough stretches without tearing
• 20+ minutes is too long: the dough loses strength and the final batard won’t hold form

If the kitchen is hotter than 25 °C, cut the bench rest to 7 minutes (butter starts to melt, dough overheats).

5. Final shaping of the batard (5 min)

• Flip the dough seam-side up on the lightly floured bench
• Stretch into a rectangle ≈25×20 cm (long side along the future batard axis, short side toward you)
• Fold the top third to the center; seal the seam line with fingers
• Fold the bottom third over; seal
• Turn 90° (long side now toward you)
• Roll into a log from the near edge to the far edge, pressing each turn with the heel of the palm (not the fingers — they tear the dough)
• Seal the seam: press it shut along the full length with the fingers
• Flip the batard seam-side down; roll under the palms across the bench 2–3 times for length and final tension

6. Into the banneton or pan (1 min)

• Into a banneton: dust lightly with flour (thin film); transfer the dough seam-side up (during baking it flips seam-down, the banneton pattern shows on top)
• Into a pan (Pullman or 9×5): transfer seam-side down
• Cover with a dome or large container without contact with the dough
• To the fridge for retard

Checkpoints

What to check	Norm	If off
Surface after final shape	Tight, smooth, doesn’t stick to hands	Lightly dust with flour, retighten
Seam	Fully sealed, doesn’t open	Press shut again with the heel of the palm
Dough temperature	Up to 26 °C	If higher — 10 min in the fridge before shaping
Batard shape	Symmetric, no skew	Roll under the palms again, even the ends

Before Loading (Pre-Bake)

Cold retard finishes the final proof — the loaf is ready for the oven. The main question: take it out earlier to “warm up” to room temperature, or straight from the fridge onto the stone?

Short answer: take out 15 minutes before, no longer

Cold dough is easier to handle and gives better oven spring. But 10–15 minutes on the bench are useful — to let surface condensation evaporate (the loaf “sweats” in the first minutes; a wet surface won’t take a clean score and won’t respond well to steam).

Why NOT a long warm-up (30–60 min)

1. Enriched dough (milk + 20 g sugar + 20 g butter) softens at room temperature; the loaf loses height and batard symmetry
2. Cold retard has already completed proofing: an extra 30–60 minutes on the bench pushes it past peak (finger poke stops springing back → dense crumb and side cracks)
3. Cold dough = cleaner scores: the lame doesn’t stick, the score opens wide and even
4. Cold surface holds off crust formation longer — more oven-spring window

Why 10–15 minutes are still useful

1. Surface condensation evaporates — cleaner score, steam does its job
2. Stones and oven reach target temperature right at the end of these 15 minutes — synchronization
3. Surface is slightly softer for a careful transfer to the peel

Practical protocol

Time before loading	Action
−60 min	Turn on the oven (210 °C, top-bottom, with stone)
−15 min	Take the loaf out, remove the cover, let the surface dry
−5 min	Score (long longitudinal for a batard, or 3–4 angled at 30°), prepare steam
0 min	Load onto the stone, steam immediately

If the kitchen is warmer than 25 °C

Shorten the warm-up to 5–7 minutes (butter melts fast). You can score straight from the fridge and gently pat any moisture off with a paper towel.

Proofing and Bake Diagnostics

Underproofing usually shows as tight lower crumb, tearing, and a loaf that springs unevenly. Overproofing shows as a weak top, poor oven spring, and a fragile slice. In enriched dough the window can feel wider because the dough is soft, so the finger-poke test should be paired with volume and dough strength.

Bake by internal temperature, not by the old timer alone. This bread contains milk and sugar, so crust colour is a weak doneness signal: the crust may look finished while the centre still needs time.

Freshness Check

The real test is not the first warm slice. Check again the next day.

Time	What to check
1–2 h after baking	Softness, moisture, crust thickness, clean dairy-sweet aroma, no wet gumminess
Next day	Whether the crumb stayed soft, slices cleanly, and avoids rubbery or dry texture

If the bread is only good warm, the method did not meet the lesson goal.

Theory Sources

• King Arthur Baking: Tangzhong technique — practical explanation of water roux and soft bread.
• The Staling and Texture of Bread Made Using the Yudane Dough Method — study on scalded flour, water retention, softness, and staling.
• Arabinoxylans as Functional Food Ingredients: A Review — background on water binding in cereal systems.
• Chemistry of bread aroma: A review — review of fermentation, baking, crust, and bread aroma.

Home Adaptation

This lesson keeps the professional soft-bread idea in a home format. Tangzhong is cooked in a small pan to a thick paste, ideally near 65 °C, then cooled before mixing. The loaf uses a normal oven, stones or a heavy tray, steam, and a probe thermometer.

Do not judge S2-C1 by lean/artisan S1 standards. Sugar, milk, butter, and tangzhong change browning, softness, slicing quality, and staling speed. The required home check is next-day freshness.

Control Questions

1. Was the tangzhong smooth, thick, and unscorched?
2. Did the paste cool before mixing so it did not overheat the yeast?
3. Was the dough smooth without overheating?
4. Was proofing stopped before the loaf weakened?
5. Was the bread removed by 94–95 °C internal temperature rather than a fixed old time?
6. Was softness checked after cooling and again the next day?

Sensory Card

After cooling and on the next day, record softness, moisture, springiness, milk note, sweetness, crust aroma, crust thickness, crumbliness, aftertaste, and staling speed.

Lesson Conclusion

Working version: keep the formula and confirm the real bake window near 30–32 minutes. The second required conclusion is softness and freshness after storage.