Bread — Autolyse, Stretch-and-Fold, Long Cold Fermentation

Modern artisan bread baking uses three specific techniques in combination to develop gluten structure, improve extensibility, and produce complex flavour without intensive mechanical mixing: autolyse, stretch-and-fold, and long cold fermentation. Autolyse, developed by French bread scientist Raymond Calvel in the 1970s, involves mixing only flour and water (withholding salt, yeast, and levain) and resting for 20–60 minutes before adding remaining ingredients. During this rest, endogenous flour enzymes — proteases and amylases — begin softening gluten bonds and the flour fully hydrates, dramatically reducing the mixing time required to achieve a smooth, extensible dough and improving overall dough structure and extensibility. Salt is withheld because it tightens gluten prematurely; yeast is withheld to prevent fermentation beginning before the gluten is ready. Stretch-and-fold replaces intensive kneading in high-hydration doughs where traditional kneading would be impractical. During bulk fermentation, the dough is stretched upward and folded onto itself in four cardinal directions every 30–45 minutes for the first 2 hours. Each set of folds aligns gluten strands, builds dough strength, and redistributes fermentation gases. High-hydration doughs (75–85% water by flour weight) require this progressive structure-building approach. Long cold fermentation (retarding) slows yeast activity while allowing lactic acid bacteria to continue producing organic acids (lactic and acetic) that develop flavour complexity. A dough retarded in the refrigerator at 4°C overnight or for 8–16 hours develops significantly more flavour than one baked the same day. Cold retarding also tightens the dough structure, making final shaping easier and producing more defined scoring. These three techniques together produce an open, irregular crumb structure, a blistered, glossy crust, and complex flavour — the hallmarks of contemporary artisan sourdough.