How to Use a Lame (Rasiermesser) — Scoring Sourdough for Beginners

Simple, practical guide to scoring sourdough with a lame (razor). Learn blade choices, angles, patterns, and troubleshooting to get reliable oven spring and attractive loaves.

What to Expect

This page teaches you how to score your sourdough safely and effectively with a lame (razor). You will learn blade selection, grip, angle, common patterns, and how scoring affects oven spring and crumb development [1][2].

What you'll learn:

  • ✓ How a score controls expansion and directs oven spring
  • ✓ Which blades and angles work best for common loaf shapes
  • ✓ Practical, repeatable scoring patterns for confident results

💭 Scoring skill improves quickly with practice. Your first attempts may be uneven — taste and oven spring matter more than perfect lines.

What You Need

Must have:

Sharp Bread Lame/Scoring Tool

New or fresh blade, handle comfortable in your hand

⚠️ Use a very sharp household razor or new single-edge blade temporarily → more

Proofing basket or lined bowl

Dough holds shape and has a seam you can set up for scoring

⚠️ Use a floured bowl; shaping becomes more important

Baked or proofed loaf on parchment paper

Easier transfer into hot pot after scoring

Alternative: Score on an inverted peel or floured board

Nice to have:

Why scoring matters:

Controls oven spring

A deliberate cut gives the loaf a weak spot so the bread expands where you want it, improving shape and crumb [1].

Prevents random splits

Without a score the crust will rupture unpredictably during oven expansion, often flattening the loaf [2].

Aesthetic and function

Scoring patterns both direct expansion and create the look you want on the final loaf [1].

Ingredients

For: Scoring one standard boule or bâtard

Bread lame or razor 1 Prefer a holder with a comfortable angle
Replacement single-edge blades Several Fresh blade for crisp cuts
Flour for dusting Small pinch Keeps dough from sticking to the blade edge
Parchment or transfer surface 1 sheet Eases movement into hot vessel

Step by Step

Set up seam → choose pattern and blade → score confidently at the right angle → bake

1

Prepare the loaf for scoring

When loaf is ready for bake

Turn your proofed loaf out of the proofing basket onto parchment paper or a floured surface. Position the seam under so the top is smooth.

✓ Loaf has tension on top and shows visible but not collapsed shape
💡 If the dough is very wet, dust lightly with flour to help the blade cut clean lines [1].
2

Choose the blade and hold

Immediate before scoring

Use a fresh single-edge blade in your Bread Lame/Scoring Tool. Hold the lame like a pen with your wrist locked but relaxed.

✓ Blade stable in handle, comfortable grip
💡 A newer blade cuts cleaner and reduces tearing; change blades frequently [2].
3

Angle and depth

As you score

Aim for a shallow, decisive cut: 20–30° for an ear (a shallow angle) or ~45° for a deeper cut. Depth 3–8 mm depending on dough strength.

✓ Blade glides through without dragging; cut is even
💡 Shallow, slashing angles promote an ear; steeper angles give a wider opening [1].
4

Make the motion

One continuous motion

Use a swift, single stroke—no sawing. Move the blade forward across the surface with controlled speed.

✓ Clean line in the dough; surface not torn
💡 Practice the motion on a damp towel to build confidence before cutting your loaf.
5

Simple patterns for beginners

Choose before scoring

Boule: single central cut (1–2 inches). Bâtard: a single long slash along the length. Seeds or wheat-look: multiple parallel cuts.

✓ Pattern fits loaf shape and size
💡 Start with one long slash—it's forgiving and directs a strong ear [2].
6

Transfer and bake

Immediately after scoring

Slide the scored loaf on parchment paper into a preheated Dutch oven or onto the baking surface. Use oven mitts for safety.

✓ Scored lines remain visible as you place the loaf in the oven
💡 Avoid touching the scored surface after cutting—the oils from fingers can seal the cuts and reduce oven spring [1].
7

Observe and adjust

During first minute in oven

If the loaf doesn't open where you scored, consider deeper or sharper angles next time. Keep notes on blade, angle, and hydration.

✓ Loaf opens predictably where scored
💡 Record the blade type and how many bakes it lasted; blade dulling is a common cause of ragged scores [2].

What If It Doesn't Work?

Troubleshooting scoring — common issues and fixes:

Score tears instead of opening

Likely: Blade dull or sawing motion

Fix: Replace blade, use single decisive stroke, try shallower angle

→ More info

Loaf opens in the wrong place

Likely: Insufficient tension or seam not properly placed

Fix: Create more surface tension when shaping and position seam under before scoring [1]

→ More info

No ear formation

Likely: Angle too steep or cut too deep

Fix: Use 20–30° shallow angle for an ear and a quick stroke; practice on smaller loaves to dial angle

Scores disappear in the oven

Likely: Wet surface or handling after scoring

Fix: Dust lightly before scoring, avoid touching surface, transfer quickly to hot vessel [2]

💪 Scoring is a tactile skill — deliberate practice yields fast improvement. Even imperfect scores often still produce excellent bread.

What now?

You want to practice more
→ Try scoring multiple bochkens or smaller rolls to practice angle and speed
You want prettier patterns
→ Study curved and layered cuts to create ears and decorative loaves
You want better oven spring
→ Work on shaping tension and proof timing
You want to understand the science
→ Read about gas expansion, gluten network and crust formation

Sources

  1. [1]
    The Perfect Loaf – The Perfect Loaf – Link
  2. [2]
    Plötzblog – Plötzblog – Link