Dark Rye Flour (Pumpernickel)
1.100× absorption · 8.00–9.00% protein · hydration 90–110%
For sourdough, Dark Rye Flour (Pumpernickel) works best at 90–110% hydration. With 8.00–9.00% protein, it absorbs about 10% more water than standard bread flour.
- Protein
- 8.00–9.00%
- Absorption
- 1.100×
- Hydration range
- 90–110%
- Category
- rye
What is Dark Rye Flour (Pumpernickel)?
Dark rye (pumpernickel flour) is coarser, contains more bran, and has the deepest flavor of all rye flours. Absorption is 10% higher than bread flour baseline. Ash content 2.0%+ indicates high mineral content from extensive bran inclusion. Used in traditional German pumpernickel (100% dark rye, 24+ hour steam bake) and Scandinavian rye breads. Hamelman's pumpernickel formula targets 95-100% hydration with 100% dark rye. Can also be used as 10-20% of a wheat-rye blend for strong rye character without going fully rye. Central Milling, Bob's Red Mill, and Janie's Mill are US reference sources.
How do you bake with Dark Rye Flour (Pumpernickel)?
Dark rye requires very wet, paste-like dough. Scald (mix flour with boiling water) for 24 hours as pre-ferment to maximize water absorption. Pan loaves only — dough is too wet to freestand. Long, slow bake at 325-350°F for 4+ hours for traditional pumpernickel character.
What hydration % for Dark Rye Flour (Pumpernickel)?
Baker's-percentage workable range: 90% — 110%. Absorption is 1.100× bread-flour baseline, so recipes written for bread flour need 10% more water when substituting Dark Rye Flour (Pumpernickel).
Related references on this site
- Dark Rye Flour (Pumpernickel) at 95% hydration — formula — calculator pre-set with this flour and hydration combination
- Dark Rye Flour (Pumpernickel) hydration range deep-dive — 90-110% workable range with technique notes
- Medium Rye Flour — hydration & absorption — same rye family — compare protein and water behaviour
- Light Rye Flour — hydration & absorption — same rye family — compare protein and water behaviour
- Guide: rye flour explained — light vs medium vs dark rye, why rye protein is not gluten, and how much water rye needs
- Full comparison: Dark Rye Flour (Pumpernickel) vs Medium Rye Flour — side-by-side protein, absorption, and hydration-range differences
- Guide: baker's percentage explained — how protein, absorption, and hydration combine in the math
- Guide: whole-grain hydration adjustments — absorption multipliers for whole-wheat, rye, spelt, einkorn
- All flour types — grouped by category (refined, whole-wheat, rye, ancient-grain)
- Reverse calculator: water → hydration % — you have a flour-and-water weight, want the hydration
- Water temperature calculator — your flour temperature is an input — land the dough at the target
- Hydration chart by bread type — typical hydration % for every loaf, at a glance
The gear that makes the math work
A short, honest baking kit. The scale matters most — every weight on this page is in grams. The Dutch oven is what turns a good crumb into a great crust.
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Dark Rye Flour (Pumpernickel) at every hydration level
Dark Rye Flour (Pumpernickel) usually works between 90% and 110% hydration — drier gives a stiffer dough, wetter a slacker one. Tap a level for the technique, the absorption math and a calculator set to it.
| Hydration | Water per 500 g | For Dark Rye Flour (Pumpernickel) |
|---|---|---|
| 55% | 275 g | Drier than usual |
| 60% | 300 g | Drier than usual |
| 65% | 325 g | Drier than usual |
| 70% | 350 g | Drier than usual |
| 72% | 360 g | Drier than usual |
| 75% | 375 g | Drier than usual |
| 78% | 390 g | Drier than usual |
| 80% | 400 g | Drier than usual |
| 82% | 410 g | Drier than usual |
| 85% | 425 g | Drier than usual |
| 90% | 450 g | In its range |
| 95% | 475 g | In its range |