The Detmold method is a German system for building rye bread around a long, cool sour rather than around yeast. This is the simplified home version: 40% rye, a cold sour sponge built the night before at 20 °C for fourteen hours (per Food and Agriculture Organization of the United Nations), and dimpling instead of scoring. The result is a moist, deeply sour loaf with the irregular pocketed surface that German bakers call "porung".
The cold sour sponge is the whole method
Take 80 g of the rye flour, mix it with 80 g of water at 20 °C and 2 g of active rye starter, and leave it covered for fourteen hours. It should smell sharply of vinegar and show a honeycomb of small holes. A warm sponge built in four hours tastes flatter and gives the loaf less keeping quality — the long cold build is where the acetic acid comes from, and acetic acid is what preserves rye bread.
| Ingredient | Weight | Baker's % |
|---|---|---|
| Bread flour | 300 g | 60% |
| Medium rye | 200 g | 40% |
| Cold sour sponge (from the rye above) | 160 g | 32% |
| Water | 430 g | 86% |
| Salt | 12 g | 2.4% |
Mixing, and the shortest bulk in the ledger
Rye at 86% hydration plus a sponge is already a very active dough. Two short wet folds, fifteen seconds each, 50 minutes apart, and a bulk of just 2 hours at 26 °C to a 25% rise. Longer than that and the dough becomes a batter that will not hold the dimples you press into it.
Dimpling instead of scoring
The top is dimpled all over with wet fingertips, pressed almost to the base, spaced about 2 cm apart. These pockets fill with steam in the oven and give the loaf its characteristic surface. 240 °C, a long 30-minute steam, and a 55-minute bake — the longest steam of any entry here, because a dough this wet needs moisture well past the point where it has set.
- Crumb rating 4/5: moist with irregular dimple pockets, sour finish.
- 16 hours cold after shaping, then straight into the oven from the fridge.
- Keeps five days; the crust softens on day two and that is expected.
A rye dough this wet cannot be scored cleanly. If you try a blade, it drags, tears, and the loaf opens in one ugly rip instead of a hundred small pockets.
Sources / 参考来源
Published reference works consulted for this log: