In Paris, croissant dough is laminated, folded, and refrigerated for at least 12 hours before baking. In Manhattan, the same dough is often rushed through in 4-6 hours. The difference isn't laziness; it's philosophy. Cold fermentation allows yeast and bacteria to work slowly, developing complex organic acids and esters that create the nutty, slightly sour complexity prized in French bread. This long, cool rise also gives gluten time to relax naturally, reducing the need for aggressive mixing. The American Speed Culture Post-WWII American baking prioritized volume and shelf stability. Quick fermentation and added dough conditioners meant bakeries could produce more loaves faster, with predictable results. But speed sacrifices nuance. A 48-hour cold fermentation produces a sourdough note without the starter, and a deeply browned crust with minimal sugar additions. "Cold dough is lazy dough, but lazy is actually hardworking," says Michel Doreau, fourth-generation baker at Doreau Boulangerie. "You give the dough time to tell you what it wants to be." Home bakers can replicate this: mix, fold once after two hours, then refrigerate at 40°F for 24-48 hours before shaping and final proof.