Sourdough Shaping Techniques: Boule and Batard

Why Shaping Decides the Loaf

Shaping builds surface tension, and surface tension is what holds a loaf tall in the oven. When the outer skin of the dough is pulled taut and smooth, it behaves like the wall of a balloon: it resists spreading and forces the trapped gas to push the loaf upward during the first 10-15 minutes of oven spring instead of outward. A well-shaped 900 g dough climbs 30-50% in height in the covered phase and opens cleanly at the score. A slack, loosely shaped dough at the same 75% hydration spreads flat within 2-3 minutes of hitting 250 °C / 480 °F heat, no matter how well it fermented.

Shaping runs in two stages. The pre-shape gathers the fermented dough into a loose round in 4-6 tucking strokes and gives the gluten a 20-30 minute rest so it stops fighting you. The final shape then builds the real tension across another 6-10 folds and drags. Skipping the pre-shape on any dough over 600 g leaves you wrestling a slack mass into a tight skin in one move, and the result is uneven tension and a rise that leans 10-20 degrees off center.

Dough Temperature and Timing Before You Shape

Shape at the end of bulk, when the dough has risen 30-50% and shows 3-6 surface bubbles per 100 cm². Dough temperature sets how it handles: at 24-26 °C / 75-79 °F the dough is soft and extensible and shapes in under 60 seconds, while at 20 °C / 68 °F it is stiffer, holds tension well, but needs slower, firmer moves. Hydration sets the difficulty in parallel: a 68-72% dough shapes cleanly with 5 g of bench flour, a 78-85% dough is sticky and rewards wet hands with almost no flour and a shape completed inside 30-45 seconds before it slackens again. A dough that has over-fermented past 60-70% rise will not hold any shape, so judge by rise and jiggle rather than a fixed clock.

Pre-Shaping and the Bench Rest

Turn the bulk-fermented dough onto a surface dusted with about 5 g of flour. Using a bench knife in one hand and your other hand cupped against the dough, push it away from you in 4-6 short strokes while the knife tucks the trailing edge underneath. Rotate a quarter turn (90 degrees) between strokes until you have a loose, rounded mass with a smooth top. The whole pre-shape takes 15-30 seconds and aims for gentle structure, not maximum tension yet.

Let the pre-shaped dough rest uncovered for 20-30 minutes; a colder 20 °C dough needs the full 30, a warm 26 °C dough is ready near 20. During this bench rest the gluten relaxes and the round spreads to roughly 1.5-2 times its width while still holding shape. That relaxation is what makes the final shape effective: a rested dough stretches into a taut skin, while a dough shaped immediately snaps back and tears. If it spreads into a flat 2 cm pancake during the rest, the gluten is weak or the dough is over-fermented; if it barely moves in 30 minutes, give it another 10.

Shaping a Boule

Flip the rested dough so the smooth side is down and the sticky underside faces up. Fold the edges into the center like closing an envelope in 4 moves: top to middle, bottom to middle, then left and right, pressing each fold to seal. Flip the parcel seam-side down onto a bare patch of bench. Cup both hands behind the far side and drag the ball toward you 4-6 times, rotating it 60-90 degrees between drags. The friction catches the underside and rolls the surface skin tighter with each pull.

Keep dragging until the top is smooth and taut and springs back within 1-2 seconds of a light press. A properly tensioned 500 g boule holds a rounded dome roughly 12-14 cm across and 7-9 cm tall. Place it seam-side up into a 22 cm round banneton dusted with 10-15 g of rice flour, so the smooth top faces the basket and the seam sits ready to flip onto your peel at bake time.

Shaping a Batard

Flip the rested dough smooth-side down and gently pat it into a rough rectangle about 20 by 25 cm, long side facing you. Fold the top third down to the middle and the bottom third up over it, a letter fold in 2 moves, then seal the seam lightly. Turn the dough 90 degrees so the seam runs left to right, then roll it away from you into a log in 3-4 turns, using the tension of the roll to tighten the skin. Seal the final seam by pinching along its full length.

With the batard seam-side down, place both hands over the center and rock it back and forth 4-6 times, moving your hands outward to taper each end. A finished 1 kg batard is an even oval roughly 25-28 cm long, 9-11 cm wide, and 6-8 cm tall, with a smooth taut top and no slack folds. Lay it seam-side up in a 25 cm oval banneton dusted with 10-15 g rice flour. The taut skin gives the batard its dramatic ear once you score along its length at a 30-45 degree blade angle.

Seam Side, Banneton, and Rice Flour

The standard is seam-side up in the banneton, smooth-side down. At bake time you invert the basket onto parchment, so the tensioned surface ends up on top and the seam underneath, where you then score. A few bakers proof seam-side down and bake without a top score, letting the seam open naturally, but the seam-up method is more predictable for controlled scoring. Flour the basket with 10-15 g of rice flour rather than wheat: rice flour has almost no gluten and does not gelatinize below 80 °C, so it stays dry and forms a non-stick barrier through a 10-14 hour cold proof at 4 °C / 39 °F. A 50/50 rice-and-wheat mix works if the banneton is well seasoned, but pure wheat flour absorbs moisture and glues the loaf to the coils.

Hydration and Choosing Your Shape

Higher hydration doughs are harder to shape and hold less tension: a 68-72% dough forgives a beginner with 5 g of flour, while an 80%+ dough demands wet hands, near-zero flour, and a shape finished in under 45 seconds. If a dough above 78% keeps slackening, lowering the water by 3-5% often fixes the shaping faster than any bench technique. To see how a hydration change shifts flour and water before you mix, for example dropping an 82% formula to 76%, run the numbers through the hydration calculator. Then match the shape to the dough: a boule suits wetter 78-85% doughs because the round holds tension evenly, while a batard shows off a strong 70-76% dough with a long ear.

Common Shaping Faults and Fixes

A loaf that bakes flat and wider than 18 cm almost always lost its tension. Either the dough over-fermented past 60% rise before shaping, in which case shorten the bulk to stop at a 30-50% rise, or the final shape never tightened because the bench carried 30-40 g of flour; strip it to 5 g and drag on a bare surface. The opposite fault is over-degassing: pressing too hard during shaping crushes the gas out and gives a tight crumb with an average hole under 3 mm. Handle firmly but briefly, folding and rolling rather than kneading, and stop the moment the skin is taut, within 60 seconds total.

A dough that tears and shows a broken surface was under-rested or too dry on top; give a 30 minute bench rest and keep the surface bare rather than dusted with drying flour. A loaf that sticks in the banneton and deflates on turnout needs 15 g of rice flour and a fully sealed seam. Shaping is a skill of touch, so shape 5-10 loaves attentively, log the rise percentage, bench-rest time, and drag count for each, and adjust one variable at a time. The taut skin that delivers a reliable 30-50% oven spring becomes repeatable within a handful of bakes.