In a former warehouse on North Eighth Street in Williamsburg, the air is steeped in the smell of freshly milled flour — not the store-bought kind, but the kind that has just passed through the millstones on site. The dough mixed from it yields a crust with a light, crackly crispness and an open crumb that carries a mineral note of East American grains.
The climate and soils of the US East Coast produce grain with a different profile from Californian or European grain: more pronounced minerality and moderate acidity. The Altbau mill grinds precisely these grains, keeping in the flour particles of bran and germ that give the bread a dense texture and a long finish.
Chad Robertson, the founder of Tartine, has spent two decades experimenting with long fermentation and local ingredients. At Altbau he is for the first time bringing the entire cycle — from grain to loaf — under one roof in New York, where previously he had to rely on deliveries.
The decision to launch his own mill reflects bakers' growing interest in short supply chains and sustainability: East American farmers gain a direct sales channel, while the bakery gains control over flour quality from milling to baking.
The opening took place on 29 October 2026 at 184 North Eighth Street, between Bedford and Driggs avenues. In the first days of November, the Danish baker Frederik Bille Brahe of Atelier September is expected here — a rare chance to try their joint experiments.
Visitors should come early: the fresh bread goes quickly, and the morning ritual — choosing a loaf, feeling its weight and aroma right at the counter — gives the fullest sense of how local grain and a master's hands create a flavor that cannot be reproduced anywhere else.
