Baking Sourdough Bread in a Dutch Oven
Scoring, steam, the two-stage bake, and how to know the loaf is actually done rather than merely brown.
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Sourdough is baked in a preheated Dutch oven at 250°C: twenty minutes with the lid on, so the loaf's own steam keeps the crust soft while it rises, then twenty to twenty-five minutes with the lid off at 230°C to set and colour the crust. It is done when the internal temperature reaches 96–98°C and the base sounds hollow when tapped. Cool it for at least two hours before cutting — the crumb is still setting.
Why a Dutch oven
Bakery ovens inject steam. A home oven cannot, and an unsteamed loaf sets its crust in the first five minutes and then has nowhere to expand. A heavy lidded pot solves this by trapping the water evaporating from the dough itself: for twenty minutes the loaf bakes in its own steam, the crust stays soft, and the oven spring — the last big rise — can happen.
Then the lid comes off, the steam escapes, and the crust bakes hard. Two ovens in one pot.
The bake
Preheat the pot with the oven for at least forty-five minutes. The loaf goes in cold, straight from the fridge — a cold, firm dough scores cleanly and holds its shape while the pot's heat drives the oven spring.
| Stage | Temperature | Time | What is happening |
|---|---|---|---|
| Preheat | 250°C | 45 min+ | Pot and lid fully saturated with heat. Do not skip. |
| Lid on | 250°C | 20 min | Oven spring. The loaf rises by a third; the crust stays pale and soft. |
| Lid off | 230°C | 20–25 min | Crust sets, colours and blisters. Rotate once if your oven is uneven. |
| Check | — | — | Internal 96–98°C. Deep brown, not tan. Hollow when the base is tapped. |
| Cool | Room temp | 2 h minimum | The crumb is still setting. Cutting early gives a gummy centre. |
Scoring
Turn the loaf out of the basket onto a square of baking paper, seam-down. With a razor blade or a very sharp knife, make one confident cut about a centimetre deep along the length of the loaf, holding the blade at a shallow angle. This is the loaf's release valve: without it, the crust splits wherever it is weakest and the shape goes with it.
One cut is enough. Decorative scoring is for photographs; a single deep slash gives the best rise.
Reading the finished loaf
| What you see | What it means | Next time |
|---|---|---|
| Dense, tight crumb, little rise | Under-fermented in bulk, or weak starter | Bulk longer; check the starter doubles in 6 h before you begin |
| Flat, spread out, large holes near the crust | Over-fermented, or over-retarded | Stop the bulk earlier; retard 12–16 h, not longer |
| Pale crust, gummy centre | Under-baked, or cut too soon | Full time with the lid off; cool 2 h before cutting |
| Crust burst at the side instead of the score | Score too shallow, or dough too warm to score | Score deeper and straight from the fridge |
| Very sour | Long retard or a hungry starter | Shorten the retard; feed the starter closer to peak |
