Scoring sourdough—slashing the dough just before it goes into the oven—is one of those skills that looks purely decorative but serves critical functional purposes. A well-executed score controls where your bread expands during oven spring, prevents random blowouts, and creates that coveted ear (the raised, caramelized ridge that signals a baker who knows what they're doing). Yet many home bakers struggle with scoring: their blade drags through the dough, tears the surface, or produces flat, uninspiring cuts. This guide will teach you exactly how to score sourdough bread with confidence, covering blade angles, depth, timing, and pattern choices that actually work.
Why Scoring Matters: Function Before Beauty
When your dough hits a screaming-hot oven (230-250°C / 450-480°F), the heat causes rapid expansion as gases inside the dough expand and water turns to steam. This is oven spring. Without a score, your loaf will find its own weak point and tear open—usually on the side or bottom where you don't want it. A deliberate score gives the dough a designated place to expand, directing oven spring upward and outward in a controlled way.
Scoring also affects crust development. The exposed interior dough from your cut gelatinizes quickly in the heat, creating a distinct texture and color difference from the outer crust. That dramatic contrast—the golden-brown crust against the lighter, shinier scored area—is what makes a scored loaf visually striking.
Finally, the ear—that elevated flap of crust along one edge of your score—forms when you cut at an angle rather than straight down. The angled cut creates a flap that lifts and caramelizes as the loaf expands. It's not just for looks: a prominent ear signals proper dough strength, adequate proofing, and correct scoring technique.
Choosing Your Scoring Tool: Lame, Razor, or Knife?
Bread Lame with Razor Blade
The traditional tool is a lame (pronounced "lahm"), a handle that holds a replaceable razor blade. Professional bakers and serious home bakers prefer lames because the razor blade is extremely sharp and thin, allowing clean cuts with minimal drag. You can hold a lame at precise angles, and curved blades (slightly bent) make it easier to achieve deep, angled cuts for ears.
Best for: Controlled, angled cuts and creating prominent ears. Ideal if you're scoring regularly.
Straight Razor Blade
A simple single-edge razor blade (the kind used for paint scraping, not shaving) works perfectly well. Hold it between your thumb and forefinger, or tape one end for a handle. Many bakers start here—it's cheap, sharp, and effective.
Best for: Beginners or occasional bakers who want to test scoring before investing in a lame.
Sharp Knife
A very sharp, thin-bladed knife can work in a pinch, but it's harder to control the angle and depth. The thicker blade creates more drag, which can pull and tear the dough surface rather than slicing cleanly.
Best for: Emergency scoring when you have no other option. Not recommended for regular use.
Pro tip: Replace your razor blade frequently—every 3-5 loaves. A dull blade drags and tears rather than slicing, ruining your score no matter how good your technique.
The Critical Variables: Angle, Depth, and Speed
Blade Angle: Straight vs. Angled
Straight cuts (90° angle): Holding your blade perpendicular to the dough surface creates a score that opens symmetrically on both sides. Use straight cuts for decorative patterns (crosses, squares, wheat stalks) where you want even expansion.
Angled cuts (30-45° angle): Holding your blade at a shallow angle—almost parallel to the dough surface—creates an undercut. As the loaf expands, the upper flap lifts to form an ear. Use angled cuts for your primary score (usually a single slash down the length of the loaf) when you want maximum oven spring and a dramatic ear.
The angle is where most beginners struggle. You need to be brave and keep the blade nearly flat against the dough. If your blade is too vertical, you'll just get a wide, flat opening with no ear.
Depth: How Deep to Cut
For the primary score (the one that will create an ear), cut about 6-12mm (1/4 to 1/2 inch) deep. Shallow cuts may not open fully, while cuts deeper than 12mm can cause excessive spreading or deflation.
For decorative secondary scores, go shallower—about 3-6mm (1/8 to 1/4 inch). These cuts add visual interest without competing with your primary expansion score.
Speed and Confidence
Move decisively. Hesitation causes the blade to drag and tear. Practice the motion a few times in the air, then commit. One smooth, continuous stroke is better than a tentative, stuttering cut.
That said, you don't need to slash wildly fast—controlled and steady beats rushed and shaky.
When to Score: Proofing State Matters
Score your dough immediately before it goes into the oven. If you score too early, the cuts will begin to close up as the dough continues to ferment and spread.
Proofing state affects scoring success:
- Slightly underproofed dough: Scores beautifully. The dough has plenty of strength and spring left, so your score opens dramatically with a great ear. The surface has enough tension to support a clean cut.
- Perfectly proofed dough: Still scores well, with good oven spring and a respectable ear. This is the sweet spot most recipes aim for.
- Overproofed dough: Difficult to score cleanly. The dough is too slack and may deflate when you cut into it. Scores open weakly or not at all, and you won't get much of an ear. The blade may drag through the soft, weakened gluten structure.
If your dough is cold from the refrigerator (cold-proofed), it's actually easier to score because the firmer surface provides more resistance. Many bakers cold-proof specifically because it makes scoring more forgiving.
Classic Scoring Patterns and When to Use Them
Single Long Slash (The Classic Batard Score)
One confident cut down the length of the loaf at a 30-45° angle. This is the iconic sourdough score, producing a dramatic ear and excellent oven spring. Position the score slightly off-center for visual balance.
Best for: Oval batard loaves, showcasing oven spring and ear development.
Cross or Square (Boule Score)
Two straight cuts forming a cross, or a square/diamond shape. Use straight (90°) cuts. This pattern allows the round boule to expand evenly in all directions without favoring one side.
Best for: Round boule loaves, rustic presentation.
Wheat Stalk
A central spine with small angled cuts branching off on either side, resembling a grain stalk. The central cut is angled; the side cuts are shallower and straighter.
Best for: Showing off on social media, gifts, or special occasions. Takes practice.
Curved or Crescent Score
A single curved cut following the arc of a round loaf. Cut at an angle for an ear that follows the curve.
Best for: Boules where you want an ear but prefer a single score rather than a cross.
Important: Keep decorative patterns simple until you've mastered basic scoring. Overly complex patterns can cause uneven baking or poor oven spring.
Troubleshooting Common Scoring Problems
The Blade Drags and Tears the Dough
Cause: Dull blade, too much hesitation, or sticky dough surface.
Fix: Replace your blade. Dust the dough surface lightly with rice flour or regular flour before scoring—this dries the surface slightly for cleaner cuts. Move more decisively.
No Ear Forms, Just a Flat Opening
Cause: Blade angle too vertical, cut too shallow, or dough overproofed.
Fix: Lower your blade angle—get it nearly parallel to the dough surface. Ensure you're cutting 6-12mm deep. Check your proofing—overproofed dough won't spring much regardless of scoring technique.
The Score Closes Up Before Baking
Cause: Scoring too early, or dough is underproofed and still actively fermenting/spreading.
Fix: Score literally right before the dough goes in the oven—don't score and then walk away. If the dough is still rising fast at room temperature, consider cold-proofing to slow fermentation.
The Loaf Blows Out on the Side
Cause: Score wasn't deep enough, or the dough found a weaker point (a seam, thin spot, or overproofed area).
Fix: Score deeper and more decisively. Ensure your shaping created even tension across the loaf surface. Check proofing—overproofed areas are weak points.
The Score Opens, But Unevenly
Cause: Inconsistent blade depth or angle during the cut, or uneven dough tension from shaping.
Fix: Practice making one smooth, continuous cut at a consistent angle and depth. Review your shaping technique to ensure even tension.
Practice Makes Perfect: Low-Stakes Ways to Improve
Scoring is a tactile, visual skill that improves dramatically with repetition. Here's how to practice:
Score every loaf in the same place: Choose one simple pattern (like a single long slash) and repeat it on every loaf until the motion feels automatic and your results are consistent. Then add complexity.
Watch your blade and dough closely: Pay attention to how the dough responds. Does it spring back? Does the blade glide or drag? Adjust in real time.
Score cold-proofed dough first: If you're nervous, start by scoring loaves straight from the refrigerator. The cold, firm surface is much more forgiving and gives you confidence to refine your technique.
Don't fear imperfection: Even a poorly executed score usually bakes into something edible and tasty. Every loaf teaches you something.
Final Thoughts: Scoring as Expression and Control
Scoring is where function meets artistry in sourdough baking. It's a moment of control and intention right before you hand your loaf over to the heat of the oven. Master the basics—blade angle, depth, timing—and you'll unlock better oven spring, more consistent results, and the quiet satisfaction of a well-executed ear. Then, when you're ready, scoring becomes a canvas for creativity and personal expression, a signature you leave on every loaf.