7 Tips for Better Oven Spring in Sourdough Bread

Oven spring is the moment of truth. You open the Dutch oven after twenty minutes and either see a loaf that has risen dramatically, split along the score, and developed a gorgeous ear, or you see a flat disk that barely moved. If you consistently get underwhelming oven spring, the good news is that it is almost always fixable. Here are seven adjustments that collectively transformed my results.

1. Do Not Over-Ferment

This is the number one cause of flat loaves, and I put it first because it was my problem for months. Over-fermented dough has already used up most of its gas-producing potential during bulk fermentation. There is not enough energy left for a dramatic rise in the oven. The gluten is also weakened by prolonged acid exposure, so the structure cannot support expansion.

If your dough feels slack, sticky, and over-risen when you shape it, bulk fermentation went too long. Aim for a 50-75% volume increase during bulk, not a full double. Under-fermented dough will give you better oven spring than over-fermented dough, so when in doubt, shape earlier rather than later.

2. Shape With Tension

A well-shaped loaf has a taut surface that acts like a balloon skin, containing the expanding gases during baking. A loosely shaped loaf expands outward instead of upward because there is nothing holding the structure together. My shaping guide covers the technique, but the key concept is surface tension. Each fold during shaping should tighten the outer skin of the dough.

3. Bake From Cold

Loading a cold, retarded dough straight from the refrigerator into a screaming-hot oven produces better oven spring than a room-temperature dough. The cold retard firms up the fats and tightens the gluten, giving the dough more structural integrity during those first critical minutes. The temperature differential also means the outer crust takes longer to set, allowing more expansion before the surface hardens.

4. Preheat Your Dutch Oven Properly

Your Dutch oven needs to be screaming hot. Preheat your oven to at least 475°F (245°C) with the Dutch oven inside for a minimum of 45 minutes, ideally an hour. Many home ovens cycle their temperature and take longer to stabilize than the preheat indicator suggests. An oven thermometer is a worthwhile investment to verify your actual temperature.

5. Score Decisively

Your score line is the relief valve that directs where the bread expands. A shallow, tentative score restricts expansion. A confident, decisive cut about half an inch deep (at a 30-45 degree angle for an ear) allows the bread to open freely along the score. Use a sharp lame or razor blade and commit to the cut in one swift motion. Hesitation creates ragged, tearing scores that look and perform poorly.

6. Maximize Steam

Steam keeps the crust soft and pliable during the first phase of baking, allowing maximum expansion before the surface sets. If you use a Dutch oven, keep the lid on for the full 20 minutes. Every time you open it to peek, steam escapes. If you use a steam tray method, use boiling water (not cold) and add an ice cube or two for sustained steam release.

7. Check Your Starter

A sluggish starter produces a sluggish rise. Your starter should at least double in volume within 6-8 hours of feeding. If it takes longer, the yeast population is weak and your bread dough will not have enough gas production for good oven spring. Feed your starter consistently for a few days before your bake, and use it at peak activity (doubled, bubbly, passes the float test). My feeding guide covers how to get your starter performing at its best.

One final thought: do not compare your oven spring to photos on social media. Those are often taken from the most favorable angle, sometimes with lenses that exaggerate height, and always represent someone's best result, not their average. Focus on consistent improvement in your own baking rather than matching someone else's highlight reel. Your bread is for eating, not for Instagram.