WBC Barista Judge Handbook: Technical Scoring Breakdown

If you’ve ever wondered how World Barista Championship (WBC) judges decide who makes the cut, the answer lies in a detailed technical scoring manual. This guide breaks down exactly what those seven judges—yes, seven—are looking for, from your workspace setup to your espresso and milk techniques. Whether you're competing or just curious how the pros are evaluated, here’s the insider breakdown.

In short: your final score comes from four sensory judges (out of seven total), with technical judges providing half the score. You’re graded on everything from workspace cleanliness to espresso extraction time and milk texture—with scores ranging from 1 to 5.5, in half-point increments. No changing machine settings, and every step matters.

How the Judging Works

Seven judges evaluate each competitor: one head judge (whose score doesn’t count toward your total), two technical judges, and four sensory judges. Your final score is the average of the two technical judges plus the total from the four sensory judges. All judges must complete both hands-on training and a written test to qualify, and their certification lasts only a few years.

Scoring Basics

All judges use the same scoring range: 1 to 5.5, including half-points (but you must start at 1.5). The lowest valid score is 1, and 5.5 is the highest possible with a half-point. One key rule: you cannot alter any machine settings, such as the filter handle.

Technical Judging Criteria

1. Workspace Cleanliness (Start & End)

Your work area should be tidy. A small amount of coffee grounds around the grinder is acceptable and won’t be penalized. Judges score this from 1 to 6—if it’s extremely messy, you’ll get 0. A well-organized, practical workspace can earn 3 to 5 points. Over-preparing (e.g., pre-pouring water or milk) will drop you to 1–2 points.

2. Cup Preheating

Cups must be hot. Judges expect you to preheat them on the machine during prep time. A hot cup earns 3–5 points. Starting with cups on the table or in water is not allowed and affects your cleanliness score. Cold cups score 0. Preheating method isn’t judged, but it must happen during the 15-minute prep.

3. Clean Towels

You must have at least three clean towels ready at the start of the performance. Using separate towels earns you 1 point.

Espresso Technique

Grinder & Dosing Understanding

Judges want to see you understand your grinder. You should test espresso quality during prep and adjust the grinder if needed. Avoid actions like pulling back the doser lever—they show poor understanding and can damage the spring. Loading coffee, leveling, and tamping are all scrutinized. In finals, few baristas score a full 6 here.

Group Head Flushing

Flush the group head before attaching the portafilter—or before dosing. This step is mandatory every time.

Portafilter Prep

The portafilter must be clean and dry before use. Wipe the rim clean before locking it in. Avoid wasting coffee during grinding and dosing. A little is okay, but losing 10g per shot (100g total) is not. Don’t sweep excess grounds back into the doser—doing so is acceptable, but dumping them into the knockbox is not. In finals, few reach a perfect 6.

Dosing & Tamping

Use the right dose and tamp evenly. Distribute grounds first, then tamp vertically. Judges look for proper distribution and extraction signs. Correct dosing helps assess whether you’re wasting coffee during the process.

Extraction Time

Espresso must be extracted within 20 to 30 seconds. Flavor is the ultimate judge—if your 18-second shot tastes great and you explain why, it may be accepted, but only if the quality is there. Otherwise, it’s a 0.

Milk Technique (Cappuccino)

Espresso Base

The same seven criteria for espresso apply here, starting with evaluating the espresso base before milk is added—look at crema color, thickness, and stability.

Milk Frothing

Use a clean pitcher. Purge the steam wand before frothing until only steam comes out. Clean the wand with a dedicated towel after frothing. Purge again afterward. The pitcher should be mostly empty after pouring—1cm of milk left earns 3–4 points, completely empty earns 5–6.

End-of-Round Cleanliness

At the end of your performance, your workspace should still be tidy. A bit of coffee around the grinder is fine, but major messes score 0. Clean up spills immediately. Hygiene and towel use are scored from 1 to 6. You should have used separate towels for the steam wand, portafilter, and work surface.

Frequently Asked Questions

How many judges score me in a WBC round?

Seven judges evaluate you: one head judge (not counted), two technical judges, and four sensory judges. Your final score combines the average of the two technical judges and the total from the four sensory judges.

What’s the scoring range for technical and sensory judges?

All judges use a 1 to 5.5 scale, including half-points (e.g., 1.5, 2.0, 3.5). The minimum valid score is 1, and you must start half-points at 1.5.

Can I adjust the machine during the competition?

No. You are not allowed to change any machine settings, including the filter handle or other machine components.

How important is workspace cleanliness?

Very. You start and end with a cleanliness score (1–6). A tidy, functional workspace earns 3–5; a mess scores 0. Over-prepping (like pre-pouring water) drops you to 1–2.

What’s the ideal espresso extraction time?

Between 20 and 30 seconds. If you serve an 18-second shot, you must prove it tastes better—and the judges must agree on the quality.

How clean must my milk pitcher be after pouring?

Mostly empty. Leaving 1cm of milk earns 3–4 points; a completely empty pitcher earns 5–6.

Do I need clean towels?

Yes. You must have at least three clean towels at the start, and using them for specific tasks (steam wand, portafilter, workspace) can earn you points.

Recommended FrontStreet Beans for Competition-Level Espresso

For baristas aiming to ace WBC-style espresso routines, FrontStreet Coffee’s Ethiopia Humbera offers bright citrus and floral notes with a juicy body—perfect for showcasing clarity. The PWN Golden Mandheling delivers a classic balanced profile with chocolate and caramel undertones, ideal for traditional espresso pairings. Both beans highlight the precision and balance demanded in technical scoring. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.