You cannot improve what you do not measure
Every roaster needs a cupping protocol. Not because it looks professional (though it does), but because cupping is how you make real decisions. You cup to evaluate green coffee samples before buying. You cup to dial in a new profile. You cup to verify that your production batches are consistent week to week. You cup to train your palate so you can taste the difference between a good roast and a great one. Without a structured cupping practice, you are guessing.
The SCA protocol, simplified for daily use
The Specialty Coffee Association has a formal cupping protocol. For daily roastery use, here is the practical version:
| Parameter | Standard |
|---|---|
| Coffee dose | 8.25g per cup |
| Water volume | 150ml per cup |
| Grind | Medium (slightly coarser than drip) |
| Water temperature | 200°F (93°C), just off boil |
| Steep time | 4 minutes before breaking the crust |
| Cups per sample | At least 3 (to check uniformity) |
Grind your coffee, place it in the cups, pour water directly onto the grounds, and start your timer. At 4 minutes, break the crust by pushing the floating grounds aside with a cupping spoon while leaning in to smell the aroma. Skim the remaining foam and grounds off the surface. Then wait a few minutes for the coffee to cool enough to taste without burning yourself.
Slurp from the spoon. Aggressively. You want to spray the coffee across your entire palate. Spit into a cup (this is a tasting, not a drinking session). Take notes. Come back to each cup as it cools, because the flavor profile changes as temperature drops. Many defects and qualities only reveal themselves as the coffee approaches room temperature.
What to evaluate
The SCA cupping form scores ten attributes. For daily roastery cupping, focus on these:
Fragrance/aroma. Smell the dry grounds before adding water (fragrance), then smell the wet crust at 4 minutes (aroma). What do you get? Fruit, chocolate, nuts, florals, spice? Or hay, rubber, smoke?
Flavor. The overall impression when you taste. Is it clean and defined, or muddled?
Acidity. Not sour. Good acidity is bright, lively, and gives the coffee structure. Think of it like the difference between flat water and sparkling water.
Body. The weight and texture of the coffee on your tongue. Thin and tea-like, or thick and syrupy?
Sweetness. Does the coffee have natural sweetness, or does it fall flat?
Aftertaste. What lingers after you swallow (or spit)? A long, pleasant aftertaste is the mark of a well-developed roast. A harsh or ashy finish points to overdevelopment.
Cleanliness. Is the cup free of off-flavors? Any taints or defects?
Setting up your cupping table
Consistency in your cupping setup is just as important as consistency in your roasting. Use the same grinder for all cupping (a dedicated cupping grinder is worth the investment). Use filtered water with consistent mineral content. Use identical cups or bowls for every session. Have cupping spoons, a hot water kettle, a scale, a timer, spit cups, and scoring sheets ready before you start.
If your grinder, water, or cups vary between sessions, you are introducing variables that have nothing to do with the coffee. Control everything except the one thing you are evaluating.
How to compare batches
Always cup side by side. If you want to evaluate a profile change, roast one batch on your current profile and one on the modified profile. Cup them at the same time, ideally blind (have someone else set up the cups so you do not know which is which). This eliminates bias and forces you to evaluate based on what is in the cup, not what you expect to taste.
For QC on production batches, pull a sample from each day’s roasts and cup it against your reference standard. If it matches, your production is on track. If it drifts, you catch it before it ships.
Identifying roast defects through cupping
Your palate is your best diagnostic tool. Here is what common roast defects taste like:
| Defect flavor | Likely cause |
|---|---|
| Grassy, raw, sour | Underdeveloped. Not enough time or heat after first crack. |
| Flat, dull, bread-like | Baked. RoR stalled during development. The roast coasted too long at low energy. |
| Bitter, smoky, ashy | Overdeveloped. Too much time or heat after first crack. Oils are carbonizing. |
| Scorched, burnt tips | Charge temperature too high or initial heat too aggressive. Outer bean is damaged before the interior catches up. |
How often to cup
At minimum: cup every new green coffee sample before you commit to buying it. Cup every profile change. Pull random QC samples from production at least once a week, more often if you are running high volume. If you are developing new offerings or dialing in a new origin, you may be cupping daily.
The more you cup, the better your palate gets. And the better your palate, the better your roasting decisions become. It is the most direct feedback loop in the business.
For more on what to do when you identify a defect, read our guide on common roast defects and how to fix them. And if you want to talk equipment, profiles, or anything else about getting your roasting operation dialed in, reach out to us.
