How to Shape a Sourdough Boule

The boule is the classic round loaf, and the shape most new sourdough bakers attempt first. A good one rises tall in the oven, splits open neatly along its score and slices into broad pieces with a crisp edge all around. A loose one spreads into a wide, flat disk, no matter how good the dough was.

Shaping is about tension. The aim is a smooth, tight outer skin that acts like a balloon, holding the loaf up and channeling the oven's expansion upward. This guide explains the envelope fold, how to round the loaf on the counter, how to pick the right basket and what to change when the loaf will not hold its shape.

Before final shaping

Tip the finished bulk dough onto a lightly floured counter and preshape it into a loose round with a bench scraper. Leave it uncovered for 20 to 30 minutes. That rest lets the gluten relax so the final shape can be tighter without tearing.

At the same time, prepare the basket. Dust a round 20 to 23 cm (8 to 9 in) banneton with rice flour, or line a bowl of the same size with a floured towel. A basket that is too wide lets the loaf spread during proofing; one that is too narrow pushes the dough out over the rim.

The envelope fold

Flour the top of the rested dough lightly and flip it so the floured side is down. Gently stretch the bottom edge toward you and fold it up to the center. Stretch the left side out and fold it over the middle, then do the same with the right side. Finally, stretch the top edge up and fold it down over everything, like sealing an envelope.

Press each fold lightly so it sticks. Then roll the whole package toward you so the last fold becomes the bottom of the loaf, leaving a smooth surface on top.

• Bottom to center
• Left over middle
• Right over middle
• Top down, then roll so the seam is underneath

Rounding on the counter

Place the dough seam side down on a clean, unfloured section of the counter. Cup both hands around the far side of the loaf, with the edges of your palms touching the counter. Pull the loaf toward you a few centimeters; the bottom should catch slightly and the top skin should stretch smooth. Rotate the loaf a quarter turn and repeat.

Four to six pulls are usually enough. The dough should look round and taut, with a slight sheen. If the counter is too floured, the dough slides instead of gripping; wipe it with a damp cloth. If the dough sticks and tears, dust the counter with the barest film of flour.

Sealing and transferring

Turn the loaf over gently and look at the base. If the seam gapes, pinch it closed. A loose seam can open in the oven and leave a lopsided loaf.

Dust the smooth top lightly with rice flour, lift the loaf with a bench scraper and set it upside down in the basket, seam side up. Cover and proof, at room temperature until the dough springs back slowly when pressed, or overnight in the refrigerator.

Seam up or seam down

Most bakers turn the loaf out so the seam is on the bottom and the smooth top can be scored. A single cross, a square or a circle of shallow cuts all work on a boule. Scoring controls where the loaf opens, so the shape stays even.

Some bakers proof the loaf seam side down in the basket instead, so the seam faces up in the oven. The loaf then bursts open along its natural seam, giving a rough, rustic top without scoring. This works best with a well-sealed, slightly stronger dough.

Fixing common boule problems

A boule that spreads wide and low usually lacked tension or was overproofed. Shape more firmly and shorten the proof. A loaf that tears across the top during rounding was pulled too hard or rounded for too long; stop as soon as the skin is smooth. A dense loaf with a big hole just under the crust is often underfermented rather than poorly shaped.

If a dough is very wet and keeps spreading, try a second round of preshaping with a 15 minute rest, then shape again. The extra tightening often gives enough structure to hold.

Common questions

How tight should the skin of a boule be?

It should feel taut and smooth, like a slightly underinflated balloon, and spring back slowly when pressed with a finger. If it is so tight that it tears, you have gone too far; if it sags when you lift it, shape it a little more.

Can I shape a boule without a banneton?

Yes. A medium bowl lined with a well-floured, lint-free tea towel works well. Use rice flour if you have it, since it prevents sticking better than wheat flour.

Why do I need to preshape?

Preshaping organizes the dough into a uniform round and starts building tension. After a short rest, the final shape can be tighter and more even than if you went straight from the bulk container to the basket.