5 Baguette Defects That Could Ruin Your Production and Hox to Fix Them

The Baguette. Source: https://noevalleybakery.com/

1. Blind Score: The Cut That Won’t Open

What happens: the score heals without lifting an ear (grigne or oreille), leaving a cylindrical loaf with less volume.

Main causes:

Dry skin before baking (skinning): It occurs when surface evaporation exceeds water diffusion from the interior, especially with air moving faster than 0.2–0.3 m/s in the proofing chamber.
A 90° cut: With a perpendicular incision, both lips open equally and the wound heals flat.
Too little initial steam: In rotary rack ovens, forced convection can sweep away surface moisture and seal the cut.

Solution: use an oblique blade angle of 30°–45°, a depth of 6 to 12 mm, a 20 – 33% overlap between strokes and 75 – 85% relative humidity during proofing. On the line, automated systems (ultrasonic, waterjet or robotic spray) remove operator variability.

2. Leathery Crust: Crisp for Only a Few Minutes

What happens: the baguette comes out crisp, but softens and turns rubbery as it cools.

The physics: when it leaves the oven, the crumb has a water activity (a_w) of 0.95–0.98 and the crust only 0.30–0.50. Water migrates into the crust and plasticizes it. According to research from Wageningen University, crispness starts to decline at an a_w of 0.55 and is lost completely around 0.70, when the crust shifts from a glassy to a rubbery state.

Main causes: not opening the damper (ouras) during the last third of the bake, ovens that are too hot with a short bake, too much initial steam, and packaging while the crumb is still warm.

Solution: open the damper in the last third of the bake, make sure the bake is complete, and don’t bag until the crumb center drops to 28–32 °C.

3. Tight Crumb: A Baguette That Looks Like Sandwich Bread

What happens: a dense, uniform crumb, far from the irregular open structure of a traditional baguette.

Main causes: yeast doesn’t create new bubbles, it only expands existing ones. A piston volumetric divider, sheeting rollers set too tight or no intermediate rest (détente) destroy the large cells and break them into uniform micro-bubbles.

Solution:

Intermediate rest: Allow at least 15 to 30 minutes of relaxation before final moulding.
Progressive roller opening: Avoid aggressive single-pass sheeting.

4. Side Blowouts: Pressure Escapes Where It Can

What happens: the dough tears along the side instead of opening at the top score. The result is misshapen or curved pieces that complicate packaging.

The physics: during the first minutes of baking, the baguette behaves like a thin-walled pressurized cylinder. Hoop stress is twice the axial stress, so any weak point yields first. If the seam (soudure) isn’t centered face-down on the tray, it becomes that weak point.

Main causes: a seam displaced to the side, too much dusting flour during shaping, an off-center pressure board, underproofing, or dough with excess strength.

Solution: seam centered face-down, shaper side guides with a 1 mm clearance, a check of pressure board parallelism and adequate proofing (apprêt). Some industrial patents use U-shaped slings to keep the piece from rotating during proofing.

5. Crust Flaking: The Crust That Peels Off in Sheets

What happens: the crust cracks and separates into flakes, which hurts presentation and creates waste. It is especially critical in par-baked frozen baguettes.

Main causes:

Excess ascorbic acid or overproofing: The loaf over-expands and the walls beneath the crust become extremely thin.
Too much steam or an oven that is too hot: Both produce an ultra-thin, “eggshell” crust.
Cooling or freezing with too much airflow: The crust (at about 180 °C) and the crumb (at about 98 °C) contract unevenly. This creates interfacial stress and micro-cracks.

Solution: dose ascorbic acid precisely, use dry steam without liquid droplet carryover, and moderate air velocity in blast chillers and freezing tunnels.

😊 Thanks for reading!

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