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Recipe · German · v1.0

R1-C3: 100% rye-flour pan loaf (Vollkornbrot)

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Third lesson of the rye-flour track: 100% rye-flour pan loaf Vollkornbrot-style on sourdough opara, without wheat flour, scald, or malt.

48 h 40 min Prep time
1 h 15 min Bake time
73 h 55 min Total time
1 pan loaf (~880–920 g) Yield
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Recipe

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For baking now: the final working formula, ingredients, steps, and baking worksheet.

Baking worksheet

Course code R1-C3 — 100% rye-flour pan loaf Vollkornbrot-style; the densest crumb in the course
Hypothesis A mature sourdough opara with 40% prefermented flour and a mandatory 12+ hour rest turn 100% rye-flour bread from a brick into an edible dense crumb with clean acidity
Main variable opara acidity and crumb stabilization after baking
Formula whole rye flour 500 g, water 400 g (80% hydration), salt 10 g; sourdough opara 200 g flour + 200 g water + 20 g inoculum
Starter 3 refreshments: 5+10+10 → 5+15+15 → 20+85+85; from ~190 g final active starter, 15–20 g goes to the refrigerator as a reserve and 20 g goes into the opara as inoculum
Opara 200 g rye flour + 200 g water + 20 g active starter; 10–14 hours at 24–27 °C to a dome and a milky-sour smell
Mix thick paste, not wheat dough; K-beater on Min 1–2 minutes to homogeneity, no windowpane to look for
Proof 24–28 °C until 1.5–1.8x rise; expect 1.5–3 hours, decide by the dough's look
Bake 250 °C 10 min with steam → 200 °C 30 min → 170 °C 30 min to 98–99 °C internal
Slice never before 12 hours after baking, ideally 24 hours; the rye crumb needs stabilization
Sensory acidity, rye aroma, density, knife stickiness, moisture, aftertaste

Lesson block: 100% rye-flour pan loaf Vollkornbrot

R1-C3 is the first pure 100% rye-flour pan loaf in the course without wheat flour, scald, or malt. The main task is to see how a sourdough opara at 40% and a mandatory 12–24 hour rest turn the densest rye-flour formula into an edible bread.

Lesson question
Can 100% rye flour at 80% hydration give a dense but not gummy crumb, and where is the line between "dense is normal" and "underbake or weak opara".
Main variable
Sourdough opara with 40% prefermented flour and a mandatory rest of the finished bread of at least 12 hours, ideally 24.
Why this way
In 100% rye flour there is no gluten network: structure is held by starch, pentosans, and opara acidity. Without a strong opara, rye-flour amylase will destroy starch during baking and the crumb will be gummy.
Expected flavor
Clean rye-flour acidity without a vinegar note, earthy aroma, dense fine-pored moist crumb, long grain aftertaste. Sweetness and malt profile only appear in the next lesson.
Learning format
Multi-day chain: 3 refreshments from the refrigerator at 5+10+10 → 5+15+15 → 20+85+85, opara overnight 10–14 hours, mix with K-beater, proof in the pan, long bake with step-down, and a mandatory rest before slicing.

Theory

  • In 100% rye flour there is almost no gluten: the main scaffold is set by pentosans (water binding) and the starch gel, which only fully sets after crumb stabilization.
  • Opara acidity is not a flavor decoration but a technological tool: it slows rye-flour amylase and stops it from destroying starch when the dough heats.
  • 40% prefermented flour is the lower working bound for home Vollkornbrot; at 20–30% there is a risk of a gummy band at the bottom, at 50%+ the profile drifts to a sourer classic German style.
  • After mixing, the dough is a thick sticky paste, not a wheat ball; looking for a windowpane or adding flour because of stickiness breaks the pentosan-gel structure.
  • Hot rye-flour crumb almost always looks sticky — this is bound water that has not yet redistributed; a slice before 12 hours gives a false-positive gumminess signal.
  • Internal temperature 98–99 °C is mandatory: with underbake a transparent moist zone stays at the bottom, and no amount of rest can "fix" it.

Checkpoints

  • Before building the opara, set aside 15–20 g of active starter in a clean jar in the refrigerator as a mother-culture reserve.
  • The opara has risen 1.8–2.5x, with a dome and bubbles throughout the volume, milky-sour smell without sharp vinegar.
  • After mixing the dough is a uniform thick paste at 26–28 °C; do not add flour because of stickiness.
  • The final proof is judged by height and the appearance of fine cracks, not only by the clock; for 100% rye flour a strong dome is not mandatory.
  • Internal temperature 98–99 °C on the probe at removal; the slice no earlier than 12 hours, ideally 24.

Sensory

Crust
color, thickness, crunch, score opening, bitterness, toastiness
Crumb
moisture, elasticity, gumminess, chew, pore size and distribution
Aroma
separate crust and crumb aroma: floury, yeasty, milky, rye, malty, spicy
Flavor
sweetness, salt, acidity, flouriness, depth, aftertaste
Score
0–10 plus one decision: repeat, increase fermentation, change flour, change bake, or close the lesson

What comes next

  1. If at 12 hours the crumb is dense but the knife does not stick and acidity is clean, the lesson is closed; the next step is R1-C4 (scald and red malt) or R2-C1 (Borodinsky).
  2. If the crumb is gummy and sticky at 24 hours, fix things in order: first opara strength and maturity, then hydration, lastly the bake and center temperature.
  3. If flavor is sharply vinegary, shorten the third refreshment time and the opara, or lower the maturation temperature without reducing the inoculum dose.
Course-frame sources

R1-C3 is the third lesson of the rye-flour track. This is the first pure 100% rye-flour bread in the course: no wheat flour, no scald, no malt, and no spices. The main learning task is to see how a sourdough opara and a mandatory rest turn the densest rye formula from a brick into an edible bread with clean acidity.

What This Lesson Studies

  1. How a sourdough opara controls rye-flour enzymes.
  2. Why a 100% rye-flour crumb is dense by definition — and where the line between dense and gummy lies.
  3. Why a 12-hour rest is mandatory specifically for 100% rye flour.
  4. How to tell an opara error from a hydration or bake error.

Theory of 100% Rye-Flour Bread

In wheat bread the main scaffold is the gluten network. In 60/40 half of that work is done by wheat flour. In 100% rye flour there is almost no gluten: structure is held by starch, pentosans, and acidity.

MechanismRole in 100% rye flourWhat to check
Sourdough oparaMain source of gas, acidity, and enzyme controlDome, bubbles, sour rye smell without vinegar
AcidityStops rye-flour amylase from destroying starchOpara smell, crumb density after rest
PentosansBind water and hold the dough, imitating a gelThick paste, not a flowing dough after mixing
StarchAfter baking forms the main crumb scaffold98–99 °C internal, mandatory rest
PanHolds the dough until acidity and starch take over the workStarting height, 1.5–1.8x rise

If the opara is weak, the crumb will be sticky and gummy even with an ideal bake. If the opara is working but the bread is cut after an hour, the crumb will look sticky by mistake.

Why the Opara Is So Large

R1-C3 uses 40% prefermented flour — the lower working bound for a home 100% rye-flour bread. A smaller share will not give enough acidity, and rye-flour amylase will destroy the starch during baking. On the slice this looks like a gummy band at the bottom or a transparent moist zone.

Share of prefermented flourExpected result
20–30%Often not enough for 100% rye flour; risk of gumminess
40%Working baseline for R1-C3
50%+Stronger acidity, denser crumb, profile closer to classic Vollkornbrot

After a successful control lesson the opara share can shift up or down — but only one variable at a time per iteration.

Why Three Refreshments from the Refrigerator

R1-C3 does not use the culture straight from the refrigerator. After long storage, wild yeast in the starter is slowed, and the balance is shifted toward lactic acid bacteria. Three refreshments at 5+10+10 → 5+15+15 → 20+85+85 are needed for two things:

  1. Boost yeast activity for normal opara rise.
  2. Clear the flavor profile from the sharp vinegar accumulated in the refrigerator.

After the third refreshment, out of ~190 g of active starter, 15–20 g goes to the refrigerator as the new mother-culture reserve, 20 g goes into the opara as inoculum, and the rest is discarded or used for pancakes.

How a 100% Rye-Flour Crumb Holds Together

In wheat dough the key question is “did the windowpane develop?”. In 100% rye-flour dough this question does not exist at all. The main question is: “is there enough acid, gas, and bound water?”.

A thick paste after mixing is normal. Dough stickiness on the hands is normal. The dough should not “pull away from the bowl walls”; it should not “gather into a ball”. Trying to knead it like wheat — Kenwood with the hook for 10 minutes — will destroy the fragile pentosan gel structure, and the crumb will turn out denser, not lighter.

Rest as Part of the Recipe

12 hours after baking is not “advice” but a working part of the recipe.

Slice timeWhat you see
1–2 hoursHot sticky crumb, knife smears, falsely looks like gumminess
6–8 hoursPartially stabilized, but moisture is still redistributing
12 hoursMinimum window for honest assessment
24 hoursThe best window for R1-C3
48 hoursFlavor settled, acidity smoothed

If the crumb seems sticky at 12 hours on the first run, check at 24 hours. Often it is not gumminess but a lack of rest.

Full Course Map

Bread Lab curriculum (in Russian) — R1-C3’s place in the overall track.

Theory Sources

Lab Protocol

Control pointWhat to recordWhy for 100% rye flour
After the third refreshmentPeak time, volume growth, smellConfirm yeast activity before building the 40%-flour opara
After 10–14 hours of oparaDome, rise 1.8–2.5x, pH 3.8–4.2 or sour rye smellOpara acidity is the main brake on rye-flour amylase
After mixingDough temperature 26–28 °C, “thick paste” textureThere is no windowpane; control only by temperature and homogeneity
After proofRise 1.5–1.8x, fine cracks on the domeFor 100% rye flour a strong dome is not mandatory
After bakingInternal temperature 98–99 °C, loaf massUnderbake = gummy bottom; full bake = stable crumb
At 12 hours of restKnife stickiness, crumb density, aromaMinimum window for honest 100% rye-flour assessment
At 24 hours of restRepeat stickiness check, rye-flour flavorFinal stabilization of the pentosan gel

Diagnosing Errors

SymptomCause for 100% rye flourWhat to check
Gummy crumb under the knife at 12 hPentosans not yet restedMinimum 24 h before slicing; next time — 36 h
Dome fell in the ovenOverripe opara or overproofOpara 1.8–2.5x, no more; proof to 1.5–1.8x
Dough tears on the bench100% rye flour gives no windowpaneThis is normal; work with wet hands, do not add flour
Crust separates from the crumbWeak fermentationOpara overnight at 24–27 °C, not in the refrigerator first time
Sharp vinegar smellOpara overripe (12+ h at 27+ °C)Shorten to 10 h or refrigerate after 6 h
Gummy band at the bottomRye-flour amylase destroyed starchIncrease opara share to 50% or extend the opara
Transparent moist zone in the crumbInsufficient opara acidityCheck refreshments; the opara should smell pronouncedly sour

Control Questions

  1. Did the starter go through 3 refreshments 5+10+10 → 5+15+15 → 20+85+85 from the refrigerator?
  2. Before building the opara, was 15–20 g of mature starter set aside in a clean jar in the refrigerator as a mother-culture reserve?
  3. Did the opara rise 1.8–2.5x and smell milky-sour, without sharp vinegar?
  4. Is the opara at 40% prefermented flour, the lower working bound for home 100% rye flour?
  5. Is the dough after mixing a thick paste, not a wheat ball? No windowpane was sought?
  6. Did the internal temperature reach 98–99 °C at removal?
  7. Is the slice made no earlier than 12 hours after baking, ideally at 24 hours?
  8. If the crumb seemed sticky at 12 h, was it checked again at 24 h?

Grading Rubric

CriterionBadNormal for 100% rye flourExcellent
Loaf domeCollapsed, craterSlightly convex, fine cracksEven dome, clean cracks
Crumb densityGummy, knife pulls crumbsDense but not stickyDense, springy slice
Knife stickiness at 24 hStrong smearingLight filmKnife clean
AromaSharp vinegar or blandSour rye, cleanLayered, rich
Crumb moistureTransparent zone, gummyEvenly moistStably moist, not gummy
Acidity by flavorDominates, pushyPronounced but not pushyClean, complements the rye flavor

Lesson Conclusion

If the 100% rye-flour crumb is dense but not gummy at 12–24 hours of rest, the knife does not stick, and the acidity is clean — R1-C3 is passed. The next step is either R1-C4 (rye flour with scald and malt) or R2-C1 (Borodinsky). If the crumb stays gummy after 24 hours — first fix the opara, then hydration, and finally the bake and center temperature.

Ingredients

Component Grams Baker's %
Whole rye flour 500 g 100%
Water 400 g 80%
Salt 10 g 2%

Ingredient details

Whole rye flour

Split
200 g into the sourdough opara and 300 g into the final dough
Brand
record the brand and milling before baking
Production date
record before mixing

Water

Split
200 g into the sourdough opara and 200 g into the final dough
Temperature
room temperature; record actual dough temperature after mixing

Salt

Important
if the salt is coarse, dissolve it in water or grind finer

Conditions and equipment

Conditions

Status
R1-C3: theoretical learning lesson, published with a notice
Course position
after R1-C1 (60/40) and R1-C2 (80% rye flour); the first pure 100% rye-flour loaf without wheat flour
Learning block
100% rye flour, sourdough opara, dense crumb, mandatory rest
Main constraint
no wheat flour, scald, malt, or spices
Doneness temperature
98–99 °C internal; probe thermometer required
Lesson-closure state
The lesson is closed if the 100% rye-flour crumb stabilizes for 12+ hours and the knife does not stick.

Equipment

Pan
rectangular pan loaf form (Emile Henry Petit Moule Cake or similar volume)
Mix
Kenwood KVC85.004SI, K-beater on Min; do not use the hook
Oven
top-bottom heat, hand steam or steam generator on the start phase
Control
probe thermometer, scale, starting-height mark for the dough

Nutrition: how to eat this bread

Bread nutrition facts

Per 100 g of bread

182 kcal

protein 5.2 g · fat 1.1 g · carbs 37.1 g

Per slice (50 g)

91 kcal

protein 2.6 g · fat 0.6 g · carbs 18.6 g

Automatic calculation from USDA + Skurikhin database for the baked loaf after evaporation. Numbers are approximate: 1) the database covers ingredients, not finished dough; 2) bake water loss is assumed at 10% — actual loss depends on crust, time, and pan. Add 5–10% in calorie trackers if needed.

Bread is a source of starch and energy. Its nutrition depends on flour, fermentation, salt, enrichment, serving size, and the rest of the plate.

Digestion
More whole grain, fibre, and fermentation usually mean longer satiety. White flour eaten alone is generally digested faster.
Helpful or harmful
Bread is not poison or medicine by itself. Overall diet matters; current guidance prioritizes whole grains, vegetables, fruits, and pulses.
Amount
For most learning tastings, 1–2 slices, about 30–80 g, is enough depending on loaf density.
Best pairings
Pair with protein, vegetables, and moderate fat; avoid making it a large standalone portion with sweet drinks or sweet spreads.

How to eat

  • Taste the bread plain for learning, then eat it as part of a balanced plate.
  • Slice dense rye thinner; with soft white bread, make sure softness does not automatically increase the serving.

Limits

  • Wheat and rye breads contain gluten.
  • For medical conditions, adjust bread type and serving size with a clinician or dietitian.
Sources

Instructions

  1. Prepare the starter

    Take the rye-flour starter out of the refrigerator. Do 3 refreshments: 5+10+10 → 5+15+15 → 20+85+85; the final refreshment at peak.

  2. Set aside reserve and build the opara

    Before building the opara, set aside 15–20 g of active starter into a clean jar and put it in the refrigerator. Mix 200 g rye flour, 200 g water, and 20 g active starter. Hold 10–14 hours at 24–27 °C to a dome and a milky-sour smell.

  3. Mix

    Put all the opara, 200 g water, 10 g salt, and 300 g rye flour into the Kenwood bowl. Mix with K-beater on Min 1–2 minutes to homogeneity; stickiness is normal.

  4. Transfer to the pan

    Grease the pan, transfer the dough, smooth with a wet spoon or wet fingers; mark the starting height and dough mass.

  5. Proof

    Proof at 24–28 °C to 1.5–1.8x rise; cues — top slightly domes, fine cracks appear.

  6. Bake

    Timers: 250 °C 10 minutes with steam, 200 °C 30 minutes, 170 °C 30 minutes to the first probe check; if the inside is below 98 °C, add 5-minute top-ups at 170 °C.

  7. Rest

    Remove from the pan, cool on a rack uncovered, wrap in cotton/linen. Do not slice earlier than 12 hours, ideally 24 hours. The slice is needed for the crumb conclusion.

A compact step map; notes and comments live in the worksheet.

R1-C3: Vollkornbrot working sheet

The sheet checks a 100% rye-flour pan loaf on sourdough opara. Three refreshments bring the culture to peak, the opara is assembled overnight, mixing and baking happen in the morning, and the slice waits at least 12 hours.

Schedule mode

Pick a starting style.

  1. Day 1, 08:00–18:00

    Refreshment 1

    Take the rye-flour starter out of the refrigerator. Mix 5 g starter inoculum, 10 g water, and 10 g whole rye flour. Base ratio for long fridge storage: 1:2:2. Hold at ~24 °C.

    Step ingredients

    • Starter inoculum 5 g rye-flour starter
    • Water 10 g
    • Rye flour 10 g
    • Yield about 25 g
    Target
    Starter wakes up, shows rise and a clean smell without sharp vinegar.
    Check
    Record the exact time of the first refreshment for journal export.
    Evidence
    Side photo of the jar, time, temperature near the jar.

    10 h timer for this step

  2. Day 1, 18:00 (Day 2 06:00)

    Refreshment 2

    When the first stage gives confident rise, bubbles, and a clean smell, do refreshment 2 at 1:3:3. If the starter is not ready, hold to a clear peak and record the delay.

    Step ingredients

    • Starter from refreshment 1 5 g
    • Water 15 g
    • Rye flour 15 g
    • Yield about 35 g
    Target
    Confident rise after the first refreshment; the next step needs predictable activity.
    Check
    Do not move on by clock alone if the starter has clearly not woken up.
    Evidence
    Time, temperature.

    12 h timer for this step

  3. Day 2, 06:00–16:00

    Refreshment 3

    When refreshment 2 gives a confident peak, do the final refreshment 20+85+85. If refreshment 2 shifted, shift this step as well.

    Step ingredients

    • Starter from refreshment 2 20 g
    • Water 85 g
    • Rye flour 85 g
    • Yield about 190 g: 15–20 g reserve to the refrigerator, 20 g inoculum to the opara, the rest to discard or pancakes
    Target
    Active rye-flour starter at or near peak plus a reserve for the future.
    Check
    Before building the opara, first move 15–20 g of active starter to a clean jar and put it in the refrigerator; weigh exactly 20 g inoculum into the opara. Do not mix the whole jar in.
    Evidence
    Peak time, temperature.

    10 h timer for this step

  4. Day 2, 16:00 (Day 3 06:00)

    Sourdough opara

    Before building the opara, separately set aside 15–20 g of mature starter into a clean jar and put it in the refrigerator — this is the mother-starter reserve for future bakes. The rest goes into the opara. Mix 200 g whole rye flour, 200 g water, and 20 g active starter from refreshment 3. Cover and hold at 24–27 °C to a dome and a milky-sour smell.

    Step ingredients

    • Whole rye flour 200 g
    • Water 200 g
    • Active rye-flour starter (from refreshment 3) 20 g from what remains after the reserve
    • Yield about 420 g sourdough opara
    Target
    Opara has risen 1.8–2.5x, bubbles throughout, sour rye smell without sharp vinegar.
    Check
    If the kitchen is cool, hold closer to 27 °C. If the opara has clearly overripened and collapsed sharply, you can use it, but the crumb will be more sour.
    Evidence
    Time, temperature.

    14 h timer for this step

  5. Day 3, 06:00–06:05

    Mix

    Put all the opara (about 420 g) into the Kenwood bowl, add 200 g water and 10 g salt, stir. Add 300 g whole rye flour. Mix with K-beater on Min for 1–2 minutes only to full homogeneity, not the hook and not to a windowpane.

    Step ingredients

    • Sourdough opara all of it, about 420 g
    • Water 200 g
    • Whole rye flour 300 g
    • Salt 10 g
    • Dough yield about 930 g
    Target
    Thick sticky paste without dry pockets; dough temperature after mixing 26–28 °C.
    Check
    Do not look for a windowpane and do not add flour because of stickiness. On Kenwood the goal is the same: only homogeneity, no long kneading.
    Evidence
    Dough temperature after mixing, texture photo.

  6. Day 3, 06:05–06:10

    Transfer to the pan

    Grease the pan, transfer the dough, smooth with a wet spoon or wet fingers.

    Step ingredients

    • Dough after mixing all of it, about 930 g
    • Pan grease thin layer, not part of the formula
    Target
    Even surface, clear starting height.
    Check
    Mark the dough height in the pan and the dough mass.
    Evidence
    Side photo, height mark, mass.

  7. Day 3, 06:10–08:40

    Proof

    Proof at 24–28 °C to 1.5–1.8x rise. For 100% rye flour the rise is usually slower than in 60/40.

    Step ingredients

    • Dough in the pan all of it, about 930 g
    • New ingredients none added
    Target
    Top slightly domes, fine cracks or bursting bubbles appear.
    Check
    Record state, not only time; for 100% rye flour a strong dome is not mandatory.
    Evidence
    Kitchen temperature, height.

    2 h 30 min timer for this step

  8. Day 3, 08:40–08:50

    Oven 250 °C + steam

    Place the pan on the rack, add steam at the start. Bake 10 minutes at 250 °C.

    Step ingredients

    • Dough after proof all of it in the pan
    • Steam water for steam; not part of the dough formula
    Target
    Initial heat and moist surface.
    Check
    When the timer rings: remove steam and drop to 200 °C.
    Evidence
    Timer, oven mode.

  9. Day 3, 08:50–09:20

    Oven 200 °C

    Bake 30 minutes at 200 °C without extra steam. 100% rye flour needs a longer main heating.

    Step ingredients

    • New ingredients none added
    Target
    Main heating of the loaf and shape setting.
    Check
    When the timer rings: drop to 170 °C.
    Evidence
    Timer, crust state.

    30 min timer for this step

  10. Day 3, 09:20–09:50

    Oven 170 °C · first check

    After dropping to 170 °C set a 30-minute timer. At the end of the timer do the first probe check.

    Step ingredients

    • New ingredients none added
    Target
    Understand how much remains until 98 °C in the crumb center.
    Check
    If already 98 °C — go to removal. If less than 98 °C — add 5-minute steps.
    Evidence
    Probe and timer.

    30 min timer for this step

  11. Day 3, 09:50–09:55

    Top-up at 170 °C

    If after the first check the inside is below 98 °C, set a 5-minute timer and check again. Repeat until 98–99 °C.

    Step ingredients

    • New ingredients none added
    Target
    98–99 °C in the crumb center.
    Check
    If the top darkens before doneness, cover with foil. When the center reaches 98 °C, remove the bread from the oven.
    Evidence
    Probe, timer.

  12. Day 3, 21:55 (Day 4 09:55)

    Slice

    Cool on a rack 2–3 hours uncovered, then wrap in cotton/linen. Slice after 12 hours as the earliest, ideally 24 hours. For 100% rye flour the rest is not optional — it is part of the recipe.

    Step ingredients

    • Finished loaf whole loaf after the rest
    • New ingredients none added
    Target
    Crumb dense, moist but not gummy; the knife does not stick.
    Check
    Describe acidity, knife stickiness, density, flavor. If the early slice was sticky, repeat at 24 hours.
    Evidence
    Tasting note, slice photo.

    12 h timer for this step

For readers who want to understand why the formula changed.

R1-C3 hypothesis

If the sourdough opara gives enough acidity and the crumb is held for 12+ hours after baking, a 100% rye-flour pan loaf will turn out dense but not gummy, with clean rye acidity.

Base version

R1-C1 and R1-C2 already showed the behavior of the rye-flour starter, rye stickiness, and pan proof. R1-C3 removes wheat flour and any additions (scald, malt, spices), leaving only three variables: opara quality, hydration, and rest time.

Iteration analysis

01 100% rye-flour bread holds together by acidity, not by dough structure
What went wrong
In wheat bread the crumb is held by the gluten network; in 60/40 half the work is done by wheat flour. In 100% rye flour these supports are absent.
Observation
Without wheat flour, crumb structure is set by starch, pentosans, and opara acidity. A weak opara leads to gumminess even with the right bake.
Hypothesis
An opara with 40% prefermented flour will give enough acidity to control rye-flour enzymes.
Decision and why
Make a large opara: 200 g flour and 200 g water + 20 g inoculum, 10–14 hours to a dome.
Conclusion
If 40% prefermented flour gives a good rise and acidity without gumminess, the dose can later be reduced to 30%.
Evidence
Prefermented flour
200 g of 500 g total flour = 40%
Opara hydration
100%
02 The post-bake rest is part of the recipe, not an option
What went wrong
In 60/40 a slice at 1–2 hours already shows something meaningful; in 100% rye flour an early slice always gives a sticky crumb.
Observation
The hot rye starch gel holds water; moisture redistribution takes 12–24 hours.
Hypothesis
A slice before 12 hours gives a false-positive gumminess signal.
Decision and why
The working sheet specifies mandatory rest of 12 hours as the earliest cut; ideally 24 hours.
Conclusion
If the crumb stays sticky at 12 hours, troubleshoot opara acidity and bake-through, not flavor.
Evidence
Earliest slice time
12 hours after baking
Optimal time
24 hours

Version history

  • v1.0May 25, 2026in development
    Problem
    In the R1-C rye-flour track, after R1-C1 (60/40) and R1-C2 (80% rye flour), a transition is needed to a pure 100% rye-flour pan loaf without scald or malt.
    Change
    Created R1-C3: 500 g whole rye flour, 400 g water (80%), 10 g salt, sourdough opara with 40% prefermented flour; multi-day sheet with 3 refreshments and a mandatory 12-hour crumb rest.
    Conclusion
    The lesson checks whether a sourdough opara at 40% and a mandatory rest can give a stable 100% rye-flour crumb in a pan loaf without help from wheat flour or scald.

Questions

Why is 100% rye flour the densest crumb in the course?

100% rye flour has no gluten network like the one wheat dough uses to hold large pores. Structure is held by starch, pentosans, and acidity; the result is a dense fine-pored crumb, and that is normal for Vollkornbrot, not a defect.

Why are 12 hours of rest mandatory?

Right out of the oven the rye crumb is still unstable: the hot starch gel and bound water must redistribute. A slice at 1–2 hours will show stickiness that disappears in 12 hours.

Can it be baked as a hearth loaf, without a pan?

Pure 100% rye-flour dough holds a hearth shape poorly without rye sifted flour or a grain base. For the control lesson it is simpler to use a pan and not mix variables.

Why such a large opara (40% prefermented flour)?

In 100% rye-flour bread the opara acidity makes the crumb edible: without it rye-flour enzymes destroy the starch and the bread turns gummy. 40% is the lower working bound for home Vollkornbrot.