That Sourdough
Rustic sourdough loaf with a deep ear and a dusting of flour on a linen cloth in morning light

Flour, water, salt and time

Sourdough you can plan, measure and repeat

Good sourdough is less about secret techniques and more about a lively starter, accurate weights and reading the dough. These guides give you all three, in grams and in baker's percentages.

Where to start

If you have never baked sourdough, work through these in order. A new starter takes one to two weeks to become reliable, so begin it today and read the rest while it grows.

Recipes

The core formula at a glance

Almost every recipe on this site is a variation on one simple formula. Flour is always 100%, and everything else is a percentage of the flour weight.

Basic country loaf, one loaf
IngredientWeightBaker's %
Bread flour450 g90%
Whole wheat flour50 g10%
Water375 g75%
Levain (100% hydration)100 g20%
Salt10 g2%
Total dough985 g197%

Change the percentages and you change the bread. More water opens the crumb but makes the dough harder to handle. More levain speeds fermentation. Salt stays close to 2% in nearly every lean loaf. The baker's percentage calculator turns any set of percentages into grams.

What you need

  • A digital scale that reads in single grams. Cups and spoons are too variable for bread.
  • A clear jar with a loose lid for the starter, so you can see it rise.
  • A large bowl or straight-sided container for bulk fermentation.
  • A Dutch oven or lidded casserole that can take 250°C (480°F), or a baking stone with a way to add steam.
  • A banneton or a bowl lined with a floured tea towel, and a bench scraper.
  • A thermometer helps: dough temperature predicts timing better than the clock.

How these recipes are written

Every recipe gives weights in grams, baker's percentages, temperatures in both °C and °F, and a time range rather than a single number. Fermentation depends on your starter and your kitchen temperature, so the ranges are guides. Learn the visual and touch cues in each recipe, and use the schedule planner to fit baking around your week. When a loaf disappoints, the troubleshooting guide works backwards from the crumb to the cause.

Do I have to make my own starter?

No. A friend's starter, or a dried starter from a reputable source, will get you baking sooner. Revive it with the feeding routine in the feeding guide.

Is sourdough just bread with a sour taste?

Not necessarily. Sourness depends on fermentation temperature, time and the balance of yeast and bacteria. A young, warm levain gives a mild loaf; a long, cool fermentation gives a tangier one.