Poilâne Levain.

There are older starters in the world, though most of them come with caveats — oral histories, approximate dates, cultures that were dried and reconstituted along the way. The Poilâne levain is different. It is not the oldest. It is among the best-documented: a working sourdough culture, maintained continuously since 1932, by three generations of the same family, in the same basement, on the same street in Paris.

Each loaf produced at Poilâne is made with a piece of the previous batch held back as the next. This is how sourdough has always worked. But at Poilâne it has worked this way without interruption for 94 years — through the German occupation of Paris, through Lionel Poilâne's death, through a Harvard student running one of the world's most famous bakeries from her dorm room. The culture survived all of it.

The Poilâne levain is inseparable from the people who kept it alive. To understand the culture is to understand the family — each generation building on the last, each one facing a crisis that might have ended the whole thing.

The bread Poilâne makes is not a sourdough in the American sense — tangy, open-crumbed, dramatic. It is a miche (French for "round loaf"), and it is deliberately dense, dark, and long-lasting. Pierre's goal was to revive the bread of the Normandy countryside: large, nourishing, built to keep. Lionel made it famous. Apollonia has kept it exactly the same.

Most of the confusion about what Poilâne bread is made from comes from calling it "whole wheat," which is inaccurate — or "white," which is also wrong. The flour is neither. It is a stone-ground wheat of approximately 85% extraction, meaning that about 15% of the bran has been removed during milling. This produces a flour that sits between white and wholemeal: grey in color, nutritionally dense, with enough bran to develop flavor and enough extraction to have structure.

Most home adaptations of the Poilâne miche substitute a blend of sifted whole wheat and all-purpose flour to approximate the 85% extraction grey flour, which is not commonly available outside France. The ratio most commonly cited: roughly 80% whole wheat to 20% bread flour, sifted to remove the coarsest bran.

The levain is stiff — lower hydration than most American starter protocols, closer to 50-60% rather than the 100% that most English-language recipes assume. This matters. A stiffer levain ferments more slowly, produces more lactic acids than acetic, and results in a milder, sweeter sourness — the Poilâne flavor profile. If you run the same miche formula with a liquid starter, you'll get a tangier, more acidic loaf. Not wrong. Just different.

The miche does not have an open crumb. This is intentional. Apollonia has described the hydration of the dough as deliberately restrained: "A wetter dough is less stiff, allowing the air bubbles in the dough to expand more. Our dough is not overly hydrated, so a Poilâne miche has a more dense, even crumb." If you are hoping for the irregular, lacey holes of a Tartine country loaf, this is not the bread. If you want something that keeps for a week, slices clean, makes excellent toast on day four, and tastes unmistakably of itself — it is the bread.

Finally: the flavor peaks on day 3. Resist cutting into it too soon.

The Poilâne levain itself is not for sale — the culture stays in the bakery, passed batch to batch. What you can buy is the bread it produces. Poilâne ships internationally from poilane.com, though international deliveries have been temporarily suspended due to a logistics issue as of mid-2026. Shipping has historically been available to most countries.

If you want to experience Apollonia's method at home, she teaches her sourdough approach in depth via MasterClass, including her version of the starter (which uses yogurt to jumpstart fermentation — something Pierre never would have done, which she acknowledges). Her cookbook, Poilâne: The Secrets of the World-Famous Bread Bakery (Houghton Mifflin, 2019), contains a full starter-building guide and the miche recipe.