What is the best starting temperature for sourdough bread?

Begin at 450–500°F (232–260°C) with steam, then reduce to 425–450°F (218–232°C) after uncovering or venting. For a first attempt at home, 475°F (246°C) followed by 435°F (224°C) is a practical middle setting.

How long should steam remain in the oven?

Use steam for roughly the first 15–20 minutes, or through the first 20 minutes in a covered Dutch oven. Remove it once the loaf has completed most of its expansion so the crust can dry and brown.

Can sourdough bake successfully without steam?

Yes, but the crust may set earlier, limiting expansion and producing a duller, thicker shell. A preheated covered Dutch oven or combo cooker is the simplest way to create a moist baking chamber without adding water manually.

Why is the oven bottom burning before the crumb is done?

The baking surface is transferring heat too aggressively or the loaf is too close to the lower element. Raise the rack, place an empty sheet pan beneath the loaf, or reduce the finishing temperature while extending the bake.

Ideal Sourdough Bread Oven Temperature: Steam and High-Heat Reality

Myth versus reality: one temperature does not control the whole bake

The practical sourdough bread oven temperature for a standard hearth-style loaf is 450–500°F (232–260°C) for the steam phase, followed by 425–450°F (218–232°C) for the drying and browning phase. The first range is a starting point, not a universal setting: oven calibration, loaf size, pan type and dough hydration all affect the result.

This split schedule separates the two main jobs. Initial high heat expands the loaf while moisture keeps the surface flexible; the lower finishing heat drives out excess moisture and develops crust color. A cold-start Dutch oven is a variation on this pattern, with the covered pot retaining the dough's released moisture during the first part of baking.

Reality check: a thermometer reading is not the same as the heat reaching the dough. Dense ovens often cycle above and below the dial setting, while thin baking steels recover quickly after a cold loaf is loaded. Judge the schedule by oven spring, crust color and internal doneness, then adjust one variable at a time.

A scored sourdough loaf baking on a steel inside a hot oven.

Myth: more heat always produces a thicker, darker crust

A hotter oven is not automatically better. Excessive heat can set the crust before the interior has expanded, producing poor oven spring, an overly thick shell or dark patches. It can also make the bottom brown faster than the crumb finishes baking, especially on a thin steel or dark pan.

High heat works best when paired with steam. Water vapor condenses on the cool dough surface, delaying crust formation long enough for the loaf to expand. It also gelatinizes surface starch, contributing to the glossy, crisp crust associated with well-baked sourdough.

Once the steam is removed, the oven needs enough residual heat to evaporate surface moisture and promote browning. If the crust remains pale after the covered or steamed phase, continue baking at the finishing temperature rather than immediately raising the heat. If the bottom darkens too quickly, move the loaf to a higher rack or place another sheet pan beneath it.

Steam rising from a scored sourdough loaf inside a covered Dutch oven.

Myth: steam can be added after the crust has already formed

Steam is most useful during the first part of baking, while the dough surface is still expanding. Adding it late cannot reliably undo a crust that has already dried and set. The exact useful window varies with oven strength, loaf temperature and size, so treat timing as a range rather than a fixed minute.

For an uncovered hearth bake, introduce steam before loading the loaf and contain it for roughly the first 15–20 minutes. A preheated Dutch oven or combo cooker achieves the same basic effect by trapping moisture released from the dough; bake covered for about 20 minutes before uncovering.

Steam safety matters. Never place a glass dish into a hot oven, and avoid pouring water onto oven components unless the manufacturer explicitly permits it. Preheat any empty pan used for steam, keep water away from oven lights and electrical elements, and use long dry oven mitts when adding it.

Preheat the oven, baking steel or Dutch oven for at least 30 minutes after the display reaches temperature.
Score the dough so expansion has a controlled opening during the steam phase.
Load the loaf, add steam or cover the pot, and avoid opening the oven during the first 10 minutes.
Remove the lid or steam source after oven spring, then continue until the crust is deeply colored and the loaf is baked through.

Baking setup	Steam phase	Finishing phase
Preheated Dutch oven or combo cooker	Bake covered at 450–500°F (232–260°C) for about 20 minutes.	Uncover and finish at 425–450°F (218–232°C).
Preheated baking steel or stone	Preheat steam equipment; bake with contained steam for 15–20 minutes at 450–500°F (232–260°C).	Vent the oven and finish at 425–450°F (218–232°C).
No dedicated steam equipment	Bake in a covered, preheated Dutch oven or combo cooker.	Uncover for the remainder of the bake.

Myth: the dial number tells you exactly what the loaf experiences

Many household ovens run hotter or cooler than the dial indicates, and heat can vary substantially between racks. A baking steel or stone also changes heat delivery by storing energy and transferring it quickly to the loaf's base. These differences explain why the same recipe can behave differently in two kitchens.

Place an oven thermometer near the baking surface and compare its stabilized reading with the dial. Use the thermometer to identify the offset, but do not assume it maps every hot or cold zone. For repeatable results, keep the rack position, preheating time and bake vessel consistent while changing the set temperature.

A probe thermometer provides a separate check for doneness. A fully baked sourdough commonly reads around 205–210°F (96–99°C), but temperature alone is not conclusive. Confirm that the crust is well browned, the base sounds hollow when tapped and the loaf feels light for its size after cooling.

Myth versus reality: troubleshooting temperature and steam results

Limited oven spring with a crust that set early usually points to insufficient steam, inadequate preheating or a score that did not cut deeply enough. Check containment first, then raise the initial temperature within the suggested range. A pale, soft crust after the steam phase generally needs more time at the finishing temperature, not another burst of moisture.

Rapid darkening calls for the opposite adjustment. Lower the finishing temperature, move the loaf higher, or shield the base with an empty sheet pan. If the center remains gummy, extend baking at the moderate finishing temperature so the interior can dry without burning the exterior.

Keep a simple bake log containing the set temperature, vessel, rack, steam duration and outcome. Change one factor per bake. Dough fermentation and shaping also influence oven spring, so a temperature change cannot correct every dense or split loaf.

Observed result	Likely issue	Next adjustment
Pale crust with weak color after steaming	Insufficient drying or browning time	Continue at 425–450°F (218–232°C) with the oven vented.
Bottom browns before the interior is done	Too much direct base heat	Raise the rack or place an empty sheet pan below the loaf.
Crust sets before the loaf expands	Weak steam containment or insufficient initial heat	Improve containment and use the upper part of the 450–500°F (232–260°C) range.
Deep color but underbaked center	Finishing heat is too aggressive	Lower the final temperature slightly and extend baking.

A repeatable high-heat sourdough baking schedule

For a typical 750–1,000 g hearth-style sourdough, preheat a Dutch oven, combo cooker, steel or stone at 475°F (246°C) for at least 30 minutes after the oven reaches temperature. Load the dough carefully, create or trap steam immediately, and keep the oven closed for the first 10 minutes.

After 20 minutes covered or steamed, remove the lid or vent the oven. Reduce the setting to 435°F (224°C) and continue for 20–30 minutes, checking color during the final 10 minutes. The exact total time depends on loaf size, hydration and the heat retained by the vessel.

When the crust is evenly browned and the loaf tests done, transfer it to a wire rack. Let it cool fully before slicing so the interior finishes setting and excess moisture can escape. For unusually small or large loaves, use the same two-phase method but adjust the finishing time based on color and doneness rather than copying the schedule exactly.