How to Score Sourdough Bread: Patterns, Tools, and Timing
Scoring sourdough bread is one of those skills that looks purely decorative from the outside but is actually a fundamental part of the baking process. Those cuts you make across the surface of your dough just before it goes into the oven are not just for show. They control where the bread expands, protect the crust from tearing unpredictably, and give your loaf the kind of dramatic oven spring that separates a truly great sourdough from a dense, pale disappointment. If you have been baking sourdough for a while and wondering why your loaves look nothing like the ones you see on Instagram, the answer is almost certainly scoring.
This guide covers everything a beginner needs to know: the tools to use, when to score, how deep to cut, and a progression of patterns from a simple single slash all the way to the leaf and wheat designs you see in bakery windows. It also covers what goes wrong and why, because understanding failure is the fastest route to fixing it.
Why Scoring Matters More Than You Think
When a shaped sourdough loaf goes into a hot oven, the yeast has one last burst of activity before the heat kills it. Carbon dioxide gas expands rapidly inside the dough, and all of that gas needs somewhere to go. If you have not scored the loaf, the gas finds the weakest point in the crust and bursts through it at random, usually along the side or bottom of the loaf. The result is a misshapen bread with a blowout — a rough, ugly tear that also affects the crumb structure inside.
When you score deliberately, you create a controlled weakness. The dough opens along exactly the line you choose, the crust rises up on either side of the cut in what bakers call an “ear,” and the loaf achieves maximum volume because the expansion is efficient rather than chaotic. A well-scored loaf with a pronounced ear is not just prettier — it has a better crust-to-crumb ratio, a more open interior, and a texture that is noticeably different from a loaf that burst randomly.
Scoring also has a practical diagnostic function. If your score opens beautifully and evenly, your dough was properly fermented and had strong enough gluten to hold the expansion. If the score barely opens at all, your dough was over-fermented and the gluten had already broken down too much to push upward. If the whole loaf spreads sideways rather than rising, the dough was too slack or the gluten was underdeveloped. Your scoring results are a direct readout of how your fermentation went.
The Tools You Need
The Lame
A lame (pronounced “lahm”) is the standard scoring tool used in professional bakeries. It is a thin, razor-sharp blade attached to a handle, and it is designed specifically for cutting through proofed dough without dragging or deflating it. The blade is essentially a double-edged razor blade — the same type used in safety razors — mounted on a curved or straight handle. The King Arthur Baking Company sells a popular version, and many home bakers in the UK order from Bakery Bits, a specialist supplier based in Devon that stocks a wide range of scoring tools as well as bannetons and baking equipment.
The key feature of a lame is that the blade can be bowed into a curve. When you curve the blade and hold it at an angle to the dough, you create the undercut that produces a pronounced ear. A straight blade held at 90 degrees to the surface produces a more open, decorative score that does not ear as dramatically but is better for complex patterns.
Replace your blades frequently. A blade that has been used for more than three or four loaves will have microscopic nicks that drag through the dough, deflating it and tearing rather than cutting cleanly. Replacement razor blades are inexpensive and widely available, and using a fresh blade makes an enormous difference to your results.
A Sharp Serrated Knife
If you do not have a lame, a sharp serrated bread knife can work for a basic single slash, though it is significantly harder to control. The serrations can catch and drag on the surface of the dough if you are not moving quickly and confidently. If you go this route, freeze the dough briefly — about 15 minutes in the freezer — before scoring. The cold firms up the surface and makes it easier to cut cleanly without the dough sticking to the blade.
Scissors
Kitchen scissors are underrated as a scoring tool, particularly for beginners. You cannot create the same flowing patterns you can with a lame, but scissors are forgiving, precise, and very hard to mess up. The classic scissor technique is to hold the scissors at a low angle to the dough surface and make a series of cuts down the center or in a staggered pattern, creating pointed peaks that bloom open in the oven. This technique is common in French baking for the “épi de blé” (wheat stalk) shape, and it works beautifully on both round boules and oval batards.
A Stencil and Flour
For surface decoration that is separate from the structural scoring, many bakers use paper stencils dusted with rice flour. You place the stencil on the proofed loaf, dust generously with white rice flour (which stays white and powdery in the oven rather than browning like wheat flour), remove the stencil, and then add your structural scores around the design. This technique does not replace scoring but adds a beautiful visual layer on top of it.
When to Score: Timing Is Everything
The single biggest mistake beginners make with scoring is doing it at the wrong time. Sourdough can be proofed in two ways — at room temperature or cold-proofed in the refrigerator overnight — and both methods have different optimal scoring moments.
Cold-Proofed Dough
If you have shaped your dough and placed it in a banneton (proofing basket) in the refrigerator overnight, score it straight from the fridge. Do not let it warm up on the counter first. Cold dough is firmer and holds its shape better during scoring. The blade moves through it cleanly, and the cuts stay open rather than closing up before you get the loaf into the oven. Cold dough also produces better oven spring because the contrast between the cold interior and the hot oven temperature creates a more dramatic temperature gradient, giving the yeast a rapid burst of activity before the crust sets.
The standard cold proof for a beginner sourdough is 8 to 16 hours at approximately 39°F (4°C). Within that range, the dough stays active enough to rise well but cold enough to be manageable at scoring time.
Room Temperature Proofed Dough
If you are doing a same-day bake with a room temperature proof, score the dough the moment it has finished proofing — not before, not after. Under-proofed dough scored too early will have a very tight, dense crumb and the score may not open properly because the gluten network is still too strong. Over-proofed dough scored too late will be slack, spread sideways, and the score will barely open because the gas structure has already started to collapse.
For a same-day bake, most beginners are looking at a 3 to 5 hour room temperature proof at around 75°F (24°C), though this varies significantly based on the strength and hydration of your starter and the ambient temperature of your kitchen. The “poke test” is your friend here: poke the proofed dough with a floured finger. If it springs back slowly and incompletely, it is ready to score and bake.
Scoring Technique: The Fundamentals
Before you make a single cut, set up your workflow so that you can move directly from scoring to oven in under two minutes. Have your Dutch oven preheated at 500°F (260°C) for at least 45 minutes. Have your parchment paper cut to size. Turn the dough from the banneton onto the parchment, and then score immediately. Every second you hesitate after the dough hits room temperature is a second you lose from your oven spring potential.
Hold the lame at roughly a 30 to 45 degree angle to the surface of the dough for a standard ear-producing score. A shallower angle produces a more dramatic ear; a steeper angle produces a more open, decorative cut. The cut should be swift and decisive — one smooth motion, not a sawing back-and-forth. Aim for a depth of about half an inch (1 to 1.5 cm). Too shallow and the score closes up during baking; too deep and you deflate the loaf.
Do not worry about making the cut perfectly straight. A slight curve actually looks more natural and professional than a ruler-straight line. What matters is consistency of depth and angle along the full length of the cut.
Scoring Patterns: From Simple to Advanced
The Single Slash
This is where every beginner should start. One confident cut, slightly off-center on a batard (oval loaf), running from one end to the other at a shallow angle. This produces a single dramatic ear and is the signature look of a classic French pain de campagne. Master this before attempting anything more complex. Seriously — get twenty loaves with a good single-slash ear before you add more cuts.
The Double Slash
Two parallel cuts running the length of a batard, offset slightly from center. This opens the loaf along two lines and produces a slightly different crumb structure — a little more even across the width. It is the second pattern to learn and a good step toward understanding how multiple scores interact.
The Cross or Square (for Boules)
On a round boule, a cross score — two cuts intersecting at the center — is the traditional beginner pattern. Score these at 90 degrees to the dough surface rather than at the shallow lame angle, since you want the loaf to open outward in four directions rather than produce ears. This is also a good entry point for boule