Sourdough Pizza: Starter, Levain and Dough Management for Flavourful Bases

What sourdough is

Sourdough is a living culture of wild yeast and lactic acid bacteria. Unlike commercial baker’s yeast - a pure culture of a single yeast strain - sourdough is a small ecosystem that you maintain yourself. The wild yeast provides the lift (carbon dioxide, which makes the dough rise), the lactic acid bacteria provide acidity and aroma: lactic acid tastes mild and yoghurt-like, acetic acid sharp and pointed. The balance between the two decides how sour and how complex your pizza tastes in the end.

For pizza, sourdough is not an end in itself. It delivers a flavour that plain yeast cannot reach, and the long fermentation makes the dough more digestible. The price: sourdough needs more time, more attention and an active starter.

Sourdough or yeast for pizza?

The decisive difference is predictability. Baker’s yeast always behaves the same. Sourdough behaves the way its starter happens to be performing - a freshly fed, vigorous starter rises noticeably faster than one that sat in the fridge for two weeks. That is exactly why PizzaPlan requires at least 12 hours of dough management for sourdough: any shorter and the result becomes unreliable.

The starter - the living culture

The starter (also called a mother dough) is the permanent culture you keep in the fridge and feed regularly. It is the source every baking day draws from. Once established, a starter can last for years if it is looked after.

Before every baking day the starter must be refreshed: fed with flour and water 8-12 hours in advance and left at room temperature. Only this wakes the culture from its cold sleep in the fridge and brings it up to full strength.

You can tell an active starter by several signs:

• The volume has roughly doubled after feeding.
• The surface and the inside are riddled with bubbles.
• A spoonful floats in a glass of water (the float test).
• The smell is pleasantly sour and fruity, not sharp or like acetone.

If the starter smells harshly of nail polish remover or a grey liquid has settled on top, it is underfed - then it needs one or two extra refreshes before it is ready to bake with.

Building a levain

From the refreshed starter you build the levain - the active sourdough made specifically for this one dough. The levain consists of flour, water and a portion of starter, and ripens for 4-6 hours at room temperature. The goal is to add it to the main dough exactly when it is at the peak of its leavening power: well risen, but not yet collapsed.

PizzaPlan calculates the levain amounts separately: how much flour, water and starter go into the levain - and it reduces the remaining amounts in the main dough accordingly, so that total hydration and flour quantity come out exactly right. You never have to work out by hand how much flour is already in the levain.

Sourdough dough management for pizza

Sourdough dough management runs through several phases. PizzaPlan turns these into a step-by-step plan, depending on your fermentation time, the flour and the hydration:

1. Autolyse (with wholemeal flour or hydration from 68 %): combine flour and water in advance and let them hydrate for 30-60 minutes. The gluten starts to develop without kneading.
2. Work in levain and salt: knead the ripe levain and the salt into the dough, 8-10 minutes.
3. Work in oil: add the oil last - with spelt flour especially carefully and only briefly.
4. Stretch & fold: stretch and fold every 30 minutes, four times. This builds dough structure without long kneading.
5. Bulk ferment at room temperature: 2-6 hours, depending on the planned total ferment.
6. Cold ferment in the fridge: most of the ripening happens here - slow, cool, flavour-building.
7. Acclimatise: take the dough out of the fridge before baking and let it come up to temperature.

Below 12 hours of total ferment sourdough is not worth it - the acidity and aroma need time. The finest results come from 24-48 hours with a long cold-ferment share.

With or without a yeast boost

For sourdough, PizzaPlan offers a yeast boost as an option - a tiny amount of baker’s yeast that supplements the wild lift:

• Pure sourdough: only the wild culture drives the dough. The full, characteristic aroma - but the timing depends entirely on the day-to-day form of the starter. If it is weak, the dough barely rises.
• With a yeast boost (hybrid): a small amount of yeast makes the lift reliable and predictable, while the sourdough aroma is largely retained. Ideal for beginners, for a young starter, or when the schedule has to hold.

PizzaPlan only factors in the yeast boost for dough management over 12 hours. For shorter ferments it is not offered - that would be more of a yeast dough with a sourdough note anyway.

Common sourdough pizza mistakes

• Starter not active enough: if you bake with a starter that did not double after feeding, the dough will not rise. Refresh it two or three times first, then bake.
• Dough time too short: under 12 hours sourdough cannot develop its aroma and lifts too weakly. Plan generously.
• Dough too sour: managed too warm or ripened too long - the acetic acid takes over. Manage it cooler and do not overrun the cold ferment.
• Too much starter in the levain: speeds up the lift but quickly brings a sharp acidity. Better little starter and more time.
• Salt straight onto the starter: salt inhibits the culture. It only goes into the main dough, never onto the starter or levain.
• Cold dough straight into the oven: a dough taken straight from the fridge is hard to stretch and rises worse in the oven. Let it acclimatise first.

PizzaPlan calculates sourdough - for free

Unlike Biga, Poolish and Li.Co.Li., which belong to PizzaPlan Pro, the sourdough calculation is free. You choose sourdough as the leavening agent, enter the fermentation time, room and fridge temperature - and decide whether to use a yeast boost. The app calculates:

• the levain amounts: flour, water and starter, listed separately;
• the remaining amounts in the main dough, already corrected for what is in the levain;
• optionally the yeast boost for dough management over 12 hours;
• a step-by-step plan from refreshing the starter to baking, with timings matched to your room temperature.

All offline, no account, no tracking. Sourdough works with every pizza style in the app - from Neapolitan to sheet-pan pizza - and with every flour type.

Who built PizzaPlan?

PizzaPlan comes from Forstinning near Munich, written by Christoph, a home pizza baker with his own wood-fired oven. The sourdough management is the same one he uses for his own baking days - no simplifications, no rough estimates. More about the app and the background on the About page.

Sourdough is free. If you want more: PizzaPlan Pro costs a one-off 2.99 € (no subscription) and includes Biga, Poolish, Li.Co.Li., 50+ specific flour brand profiles, sweet yeast doughs and all future Pro features. Play Store · App Store.