Sourdough bread, with its tangy flavour, chewy crust, and airy crumb, has captivated bakers and food lovers for centuries. In recent years, this ancient bread-making method has surged in popularity, thanks to its artisanal appeal, health benefits, and the rewarding challenge of crafting something from scratch. Whether you’re a novice or a seasoned baker, this guide will equip you with the knowledge, recipes, and troubleshooting tips to master the art of sourdough.
The science of sourdough: Why it’s unique
Sourdough stands apart from commercial yeast-based breads due to its natural fermentation process. Instead of store-bought yeast, sourdough relies on a wild yeast and lactic acid bacteria (LAB) culture—commonly called a starter. This symbiotic mixture ferments the dough, breaking down gluten and starches, which enhances flavour, texture, and digestibility.
Wild yeast: Captured from the environment, wild yeast (often Saccharomyces exiguus) leavens the dough slowly, creating complex flavours.
Lactic acid bacteria: LAB produce lactic and acetic acids, contributing to sourdough’s signature tang and acting as natural preservatives.
Health benefits: The long fermentation increases bioavailability of nutrients, reduces gluten content, and lowers the bread’s glycemic index.
Understanding this science is key to troubleshooting and refining your sourdough process.
Essential tools and ingredients
Before diving into the recipe, gather these tools and ingredients:
1. Sourdough starter: Active, bubbly, and fed 4–12 hours before use.
2. Flour: High-quality bread flour (for structure) and whole-grain flour (for flavour and nutrients).
3. Water: Filtered or non-chlorinated, at room temperature.
4. Salt: Fine sea salt (2% of total flour weight).
5. Kitchen scale: Precision is critical—measure ingredients by weight.
6. Dutch oven: Traps steam for a crisp crust.
7. Banneton (proofing basket): Shapes the loaf and wicks moisture.
8. Dough scraper: For handling sticky dough.
9. Lame or razor blade: Scores the dough to control expansion.
Step-by-step Sourdough recipe
Total time: 24–36 hours (including starter prep and fermentation)
Yield: 1 loaf (800g)
Day 1: Prepare the leaven
Feed your starter: Mix 20g active starter + 100g water + 100g bread flour. Let rise until doubled (4–8 hours).
Day 2: Mix and bulk fermentation
Autolyse: Combine:
350g bread flour
50g whole wheat flour
300g water
Let rest 1 hour to hydrate gluten.
Add leaven and salt:
Mix in 100g leaven + 10g salt.
Knead 5–10 minutes until smooth.
Bulk fermentation:
Let dough rise at 75°F (24°C) for 4–6 hours.
Perform 3–4 “stretch and folds” every 30 minutes to strengthen gluten.
Shape and proof
1. Pre-shape: Turn dough onto a floured surface, form a loose ball, and rest 30 minutes.
2. Final shape: Tighten into a boule or batard. Place seam-side up in a floured banneton.
3. Cold proof: Refrigerate 12–16 hours to develop flavour.
Bake
1. Preheat: Place Dutch oven in a 500°F (260°C) oven for 1 hour.
2. Score: Turn dough onto parchment, slash the top with a lame.
3. Bake:
20 minutes covered at 500°F (260°C).
25 minutes uncovered at 450°F (230°C) until deep golden.
4. Cool: Let rest 2 hours before slicing.
Common sourdough mistakes and troubleshooting
Dense or gummy crumb
Cause: Under-fermentation or insufficient gluten development.
Fix: Extend bulk fermentation time or ensure proper stretch-and-folds.
Flat loaf
Cause: Over-proofing or weak starter.
Fix: Shorten proofing time or refresh starter more frequently.
Pale crust
Cause: Oven temperature too low.
Fix: Preheat Dutch oven longer or increase baking time.
Excessive sourness
Cause: Long cold proof or high acetic acid production.
Fix: Reduce cold proof time or feed starter more often.
Advanced tips for perfecting your sourdough
Experiment with hydration: Higher hydration (75–85%) yields an open crumb but requires skilled handling.
1. Incorporate whole grains: Replace 20% of bread flour with rye, spelt, or einkorn for nutty flavours.
2. Boost flavour with add-ins: Fold in seeds, nuts, or dried fruit during shaping.
3. Master scoring: Use decisive, swift cuts at a 45° angle for optimal “oven spring”.
4. Maintain starter health: Feed 1:1:1 (starter:water:flour ) daily if kept at room temperature, or weekly if refrigerated.

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