A croissant is not bread. It is a laminated pastry — built from alternating layers of dough and butter, folded and refrigerated repeatedly over two to three days until you have something between 27 and 54 distinct layers depending on the method. Each layer contributes to the shattering crust and the airy, honeycomb interior that defines a properly made croissant. None of this happens in a day.
The process begins with the détrempe — the base dough, made from stone-milled flour, whole milk, sugar, salt, yeast, and a small amount of butter. We mix it until smooth, shape it into a flat rectangle, and refrigerate it overnight. This cold rest allows the gluten to relax, lets the yeast begin a slow fermentation that develops flavor, and ensures the dough stays cold enough not to melt the butter block that will be folded in the next day.
Lamination is the heart of the process. A cold butter block — we use 84% fat French-style butter from a Wisconsin creamery — is beaten flat and wrapped inside the détrempe. The combined package is rolled and folded in a sequence called a "turn." We do three turns with a 30-minute refrigeration between each. Temperature control is critical: if the kitchen is too warm, the butter melts into the dough rather than staying as discrete layers, and you get a brioche roll instead of a croissant.
On the final day, the laminated dough is rolled to precise thickness, cut into long triangles, and hand-rolled into the classic shape. The shaped croissants proof for two to four hours at controlled temperature. The yeast creates gas pockets within the layers that will expand dramatically in the oven. We brush each one with egg wash before baking. They bake at high heat for 18 minutes. The first five minutes — when the butter releases steam and the layers explosively separate — is what creates the shatter. That sound when you break one open is the whole point.
Every step exists for a reason. You can compress this into one long day if you work fast and keep everything very cold — but the flavor will not be the same and the layers will be less defined. At Maison Bertrand, we start our croissant process on Tuesday for Thursday's batch, Wednesday for Friday's. There is always dough in some stage of the three-day cycle. This is the only way we know to do it right.
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