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
- 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 15 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.
- Digital kitchen scale (0.1 g)View on Amazon →
- Dutch oven / combo cookerView on Amazon →
- Banneton proofing basketView on Amazon →
- Bread lame + bench scraperView on Amazon →
- High-protein bread flourView on Amazon →
- Danish dough whiskView on Amazon →
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