Scoring: ear, expansion, and intent

Scoring is the cut you make in the surface of a shaped loaf just before it goes into the oven. Done right, the score opens dramatically as the loaf expands in the oven's heat, producing a tall ridge of crust called the ear. Done wrong, the loaf either splits randomly along its sides or fails to open at all. Neither is what you want.

The score is structural, not decorative. It controls where the loaf expands. It's the most-photographed part of a sourdough but also the most misunderstood: beginners chase the ear without understanding why some loaves get one and others don't.

What scoring actually does

When a shaped loaf hits the hot oven, the gas inside expands rapidly. The dough wants to grow. But the surface of the dough has been tightened by shaping into a taut skin. That skin resists expansion. Without scoring, the loaf splits open along the path of least resistance, usually a random spot on the side or bottom.

Scoring gives the dough a designated weak point. The expansion concentrates there. Instead of an ugly side blowout, you get a controlled opening that becomes the loaf's signature ridge.

If a loaf is well-shaped (good surface tension), well-fermented (lots of gas to release), and well-baked (high enough heat to drive rapid expansion), scoring produces a dramatic ear. If any of those three is missing, even perfect scoring won't produce one.

What you need

A lame (pronounced "lahm") is the standard scoring tool. It's a thin razor blade attached to a small handle. The blade is flexible, allowing you to score at an angle. A lame costs €5–10 and lasts years.

Alternatives that also work: a single-edge razor blade held by hand, a craft knife, or a serrated bread knife (less precise but functional). What doesn't work: a regular kitchen knife. It tears the dough rather than cutting it cleanly. A clean cut is essential.

The classic single score

For most sourdough boules and batards, a single curved or straight score along the top is the standard.

How to make it:

1. 1.Take the loaf from the banneton and place it on a piece of parchment paper or a peel.
2. 2.Hold the lame at a 30–45° angle to the loaf surface: almost flat, not perpendicular.
3. 3.Position the blade at the start of the score line. For a batard, this is one end of the loaf; for a boule, slightly off-centre.
4. 4.Score in one quick, confident motion: 5–10 cm / 2–4 inches long, depth about 1 cm / ½ inch.
5. 5.Don't go back and re-cut. A clean single stroke produces a clean ear. Multiple strokes produce a torn, messy opening that doesn't ear properly.

The angle is the most important detail. A flat, angled cut creates a flap of dough that lifts during oven spring; that lifted flap is the ear. A perpendicular cut creates a slot that opens but doesn't form a ridge.

Why the angle matters so much

Visualise the cross-section of a scored loaf. A perpendicular cut goes straight down. When the loaf expands, the cut just opens wider, like a crack. There's no piece of dough that lifts upward.

An angled cut is different. The blade slices under a thin layer of dough at a shallow angle, creating a flap on one side of the cut. When the loaf expands, that flap lifts upward as a flag, peeling back from the loaf body. The lifted flap is the ear.

Get the angle right and the ear forms naturally. Get the angle wrong and you can score a beautifully fermented loaf and still get no ear, just a splayed crack.

Decorative scoring

Beyond the structural single score, you can add additional shallower cuts for visual effect. Wheat-stalk patterns, leaves, geometric designs: all common on home sourdough loaves.

Two rules:

1. 1.One score should be the structural one, deep enough to open dramatically and produce the ear. The others should be shallow (2–3 mm), purely decorative.
2. 2.More cuts = less expansion at any single cut. Multiple deep cuts spread the expansion across many smaller openings; none of them produces a dramatic ear. If ear height matters to you, keep decorative cuts shallow.

Scoring cold dough vs warm dough

Cold-retarded dough is much easier to score than room-temperature dough. The cold firms the surface enough that the blade glides cleanly without dragging. Score immediately upon taking the loaf from the fridge; the dough is at its firmest then.

Room-temperature dough is softer and stickier; the blade tends to drag rather than slice. A wet blade (dip in water before each cut) helps. So does a faster, more confident motion. Hesitation is what produces tearing.

Common scoring mistakes

Too shallow

A score that's only 3 mm deep doesn't reach far enough into the dough to control where it opens. The loaf often blows out along its sides instead. Aim for 1 cm / ½ inch for the structural score.

Too deep

A score deeper than 1.5 cm / ⅔ inch cuts into the dough's gas-holding structure. The score still opens but the ear is weak; the dough has lost too much integrity at the cut location.

Hesitating mid-score

Stopping the blade halfway through and starting again creates a discontinuous edge that tears rather than opens. Score in one motion, even if that motion is short. Multiple short single-motion scores are better than one long hesitating one.

Scoring perpendicular instead of angled

Most beginners score with the blade vertical, the natural-feeling motion. The result is a loaf that opens but doesn't ear. Practice the 30–45° angle deliberately until it feels normal.

What's happening in the oven

The first 10–15 minutes in the oven are when scoring matters. The dough is still soft and elastic; the gas inside is rapidly expanding from heat. The score opens dramatically during this window: the ear lifts, the crust starts forming around the new opening.

By minute 15–20, the crust has set and no further expansion happens. Whatever the score has done by then is permanent. This is why oven temperature matters so much for ears: a hotter oven (typically 230–250 °C / 450–480 °F for sourdough) produces faster, more dramatic expansion than a cooler one.

Steam in the early bake matters too. A Dutch oven traps the loaf's own moisture; a baking-stone setup needs added steam (a tray of water, ice cubes thrown into a hot pan) to keep the surface flexible enough to expand cleanly. Without steam, the surface dries and cracks before the score has time to fully open.

The takeaway

One confident, angled cut. 30–45 degrees to the surface, 1 cm / ½ inch deep, in a single motion. Done on cold dough straight from the fridge. The ear that forms is the result of good shaping, good fermentation, and good baking; scoring just controls where it appears. Get the structural cut right; treat decorative cuts as secondary.