Apprêt sur Couche

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The couche (from the French for ‘bed’ or ‘layer’) is the heavy linen cloth used in French boulangerie to support baguettes, bâtards, and other long-form breads during their final proof (apprêt), and the technique of using it properly is essential knowledge for any serious bread baker. The couche provides three functions that no baking sheet can replicate: it absorbs surface moisture from the dough, promoting a dry skin that facilitates scoring and crust formation; it supports the dough’s sides, preventing long loaves from spreading flat during proofing; and it allows close spacing of multiple loaves, maximising the baker’s limited counter and refrigerator space. The couche is made from heavy, unbleached, unwashed linen (toile de lin brut) — never cotton, which is too absorbent and too textured, causing sticking. Before first use, the linen is liberally dusted with flour and rubbed in; over time, the accumulated flour creates a natural non-stick patina that improves with each use (a well-seasoned couche should never be washed, only shaken out and air-dried). To use: the couche is laid flat on a board or table, generously dusted with flour, and the shaped loaf is placed seam-side up on the cloth. The linen is then pulled up to form a pleat (wave) on each side of the loaf, creating walls that support the dough. Multiple loaves are lined up side by side with pleats between them, each supported in its own linen channel. The pleats must be tall enough to support the dough’s full height during proofing. To transfer a proofed loaf from couche to oven, a transfer board (planche de transfert) or flipping board is placed alongside the loaf, which is gently rolled onto it with the couche, then tipped seam-side down onto the loading peel. This transfer must be swift and confident — the proofed dough is fragile and extended handling will degas and deform it.

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