How the SCAA Cupping Protocol Evaluates Specialty Coffee

If you’ve ever wondered how professional tasters consistently evaluate coffee quality—beyond just tasting notes—there’s a standardized method behind it. Developed by the Specialty Coffee Association of America (SCAA), this cupping system provides a repeatable framework to assess everything from aroma to defects, ensuring fair and objective comparisons across coffees.

The SCAA’s official cupping protocol uses a specific set of tools, roast levels, ratios, temperatures, and scoring criteria to evaluate specialty coffee. The process includes detailed steps for sample prep, brewing, sensory evaluation, and scoring—with final grades ranging from 'Below Specialty' to 'Outstanding'.

What Is the SCAA Coffee Cupping System?

The SCAA cupping system is a standardized methodology designed to evaluate coffee quality through controlled sensory analysis. Recommended by the SCAA’s Numbers and Standards Committee, this system ensures accuracy when assessing most coffee samples. While too technical for most café use, its methods help anyone better understand coffee flavors during cupping.

Required Equipment & Environment

To follow the SCAA cupping protocol, you’ll need specific tools and conditions:

• Cupping cups: 5–6 oz Manhattan or ‘Rocks’ glasses (175–225ml ceramic bowls also allowed); all cups must be identical in capacity, material, and cleanliness. Optional lids of any material.
• Grinder: To grind samples just before cupping.
• Cupping spoon: Long-handled spoons for breaking crust and tasting.
• Roaster: Must use a SCAA-approved cupping roast profile.
• Water: Fresh, unsoftened, non-distilled water with TDS 100–250 ppm (ideal: 125–175 ppm), heated to 200°F (93°C)—adjust for altitude.
• Other essentials: Quiet environment, clean table, good lighting, absence of distracting smells (no phones or strong odors), pencil, clipboard, score sheets.

Sample Preparation & Roasting Guidelines

The coffee samples must be roasted within a tight window and ground right before use:

• Roast level: Light to light-medium (Agtron whole bean: 58 ±1, ground: 63 ±1; range allowed: 55–60 or SCAA #55). Roast time: 8–12 minutes. No obvious scorching or tipping.
• Cooling: Rapid air cooling (no water); store sealed at room temp (75°F/20°C) once cooled, away from fridge/freezer.
• Brew ratio: 8.25g coffee per 150ml water (midpoint of Golden Cup standard). Adjust coffee dose within ±0.25g to hit target volume.
• Grind size: Slightly coarser than standard drip—70–75% of coffee should pass a US Standard #20 sieve.
• Preparation: Grind samples immediately before cupping. Each cup gets the same dose. Grind enough for at least 5 cups per sample to ensure consistency. Clean grinder between origins. After grinding, let coffee sit no more than 15 minutes before pouring water—or cover and brew within 30 minutes if needed.

The Cupping Process Step by Step

The protocol breaks evaluation into sensory stages, timed to coffee cooling phases:

1. Dry Aroma / Wet Aroma (Fragrance / Aroma)

Before pouring water, smell the dry grounds within 15 minutes of grinding. Then pour hot water (200°F/93°C) to the rim, break the crust after 3–5 minutes of steeping by stirring 3 times with a spoon without disrupting the surface, and evaluate the wet aroma. Score both dry and wet aromas.

2. Flavor, Aftertaste, Acidity, Body, and Balance (160–140°F / 71–60°C)

Once the coffee cools to around 160°F (71°C)—within 8–10 minutes post-pour—start tasting. Slurp to aerate and assess flavor (the primary taste profile), aftertaste (how flavors linger), acidity (brightness), body (mouthfeel), and balance (how these elements harmonize). Repeat tastings as the coffee cools further (to ~140°F/60°C), noting any changes and marking scores with arrows to final values.

3. Sweetness, Uniformity, and Clean Cup (Room Temp / Below 100°F / 38°C)

At or below room temperature (~100°F/38°C), evaluate sweetness (pleasing sugar-like notes), uniformity (consistency across all cups), and clean cup (absence of off-flavors). Each attribute is scored up to 2 points per cup (max 10 total).

4. Overall Impression & Defects (Down to 70°F / 21°C)

As the coffee cools further (minimum 70°F/21°C), give an overall subjective judgment based on all attributes. Also identify defects: taints (mild, non-dominant off-notes like “fermented” or “rubbery,” 2 points per cup) and faults (strong, dominant flaws like “sour” or “chemical,” 4 points per cup). Record affected cups and total defect impact (points × number of cups).

How Coffee Is Scored

Each sensory attribute is graded on a 16-point scale (0.25 increments) from 0–10, though practical scoring ranges from 6.00 to 9.00:

• 6.00–6.75: Good
• 7.00–7.75: Very Good
• 8.00–8.75: Excellent
• 9.00–9.75: Outstanding

The final score combines all positive attribute scores, then subtracts defect penalties. Final quality classifications are:

• 90–100: Outstanding (Specialty grade)
• 85–85.99: Excellent
• 80–84.99: Very Good
• Below 80: Below Specialty Quality (Not Specialty)

FAQ

What is the ideal coffee-to-water ratio in the SCAA cupping protocol?

The SCAA cupping standard uses 8.25 grams of coffee per 150 milliliters of water. This ratio sits at the midpoint of the Golden Cup standard and can be adjusted within ±0.25g to maintain consistency in volume.

What grind size should I use for SCAA cupping?

The recommended grind size is slightly coarser than standard drip coffee—fine enough that 70–75% of the grinds will pass through a US Standard #20 sieve. This ensures proper extraction during the cupping process.

How long should coffee rest after roasting before cupping?

Coffee should be roasted within 24 hours of cupping and allowed to rest for at least 8 hours post-roast. Roasting must be completed 8–12 minutes after first crack, with no scorching or obvious defects.

What temperatures are used for pouring and brewing in SCAA cupping?

Water should be freshly boiled and poured at approximately 200°F (93°C). Adjust temperature for altitude. Brewing begins immediately after pouring, with a 3–5 minute soak before breaking the crust.

How are defects scored in the SCAA cupping system?

Defects are categorized as taints (mild, 2 points per cup, e.g. “rubbery”) or faults (strong, 4 points per cup, e.g. “sour”). The total defect score is the sum of the point value multiplied by the number of affected cups, subtracted from the total attribute score.

What is the final scoring range and what do the grades mean?

Total scores range from 6.00 to 10.00. Final grades are: 90–100 (Outstanding / Specialty), 85–85.99 (Excellent), 80–84.99 (Very Good), and below 80 (Below Specialty Quality / Not Specialty).

Recommended FrontStreet Coffee for Cupping & Evaluation

Try FrontStreet Coffee’s Ethiopia Guji Idido Natural for vibrant fruit and floral notes, perfect for practicing cupping. Their Colombia Huila Popayan Washed offers balanced acidity and caramel sweetness, ideal for evaluating clarity and body. For a classic benchmark, the Ethiopia Yirgacheffe Kochere showcases citrus, jasmine, and berries—great for training on aroma and defects. All three are single origins roasted to highlight distinct profiles. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.