Cupping for Value: How to Review a Coffee Like a Pro

Sixty-six percent of American adults drink coffee daily, and specialty coffee is at a record 48% of past-day consumption (NCA). That's a lot of people sipping, but almost none of them know how to actually review a coffee. Most "reviews" you see online are glorified diary entries: "I tasted berries and chocolate." That's not a review; that's a mood board. Working in this field, we judge coffee by numbers—extraction yield, TDS, roast level, and a 100-point scale. If you want to move from casual sipper to someone who can tell a roaster why their batch missed, you need a protocol. Here's how we actually do it, step by step.

Start with the Beans: Roast Level and Grind

Imagine you're a home brewer who just bought a bag from a local roaster. The label says "medium roast." Before you brew, you need to know what that means. Roast levels are not arbitrary: light roasts stop at or just after first crack (196–205°C), medium roasts land between first and second crack (210–220°C), and dark roasts go through second crack (240–250°C) (Roast Magazine). That temperature range determines flavor: light roasts are bright and acidic, medium roasts are balanced and nutty, dark roasts are smoky and low-acid.

For a review, the roast level is your baseline. It tells you what to expect. If a "medium" roast tastes like burnt rubber, you know they pushed it too far. Grind size is next: the grind size chart maps grind to method, and for a V60 pour over you want medium-fine (Roast Coffee Co. grind size). But grind isn't just about method—it's about extraction. The SCA Golden Cup standard calls for 55 grams of coffee per liter of water, with a tolerance of 50–60 g/L (SCA). That's your starting ratio. If you're brewing a 12-ounce cup (about 355 mL), that's roughly 19–22 grams of coffee. Get a scale. Eyeballing is how reviews go wrong.

The Cupping Table: Where Reviews Actually Happen

You don't have to be a Q Grader to review coffee, but you should borrow their protocol. The SCA cupping method uses 8.25 grams of coffee per 150 mL of water, water with a TDS of 125–175 ppm, and a grind slightly coarser than drip (PyraBrew cupping). You evaluate five cups side-by-side to check uniformity; one defective cup penalizes the whole lot (PyraBrew cupping). That's a crucial lesson: a single bad bean or a stalled roast ruins the batch. So when you review, don't just brew one cup. Brew two or three, from different parts of the bag, and note if they taste different.

The cupping scale runs 0–100, and specialty grade starts at 80 (Roast Coffee Co. specialty). But you don't need to assign a number if you're not a certified taster. What matters is consistency: does the coffee taste the same across cups? Does it have a clean finish or a lingering bitterness? Those are objective observations. The SCA cupping protocol also evaluates ten attributes, including aroma, flavor, aftertaste, acidity, body, and balance (PyraBrew cupping). That's your checklist. If you can say, "Acidity was bright but astringent," you're already ahead of 90% of online reviewers.

Brewing to the Golden Cup: Extraction and TDS

Now you're ready to brew. The Golden Cup standard isn't just about ratio—it's about hitting a target. The brewed strength should be 1.15–1.35% total dissolved solids (TDS), and the extraction yield should be 18–22% of the dry coffee mass (SCA). That means you're extracting the right amount of flavor compounds without over- or under-extracting. Over-extracted coffee tastes bitter and dry; under-extracted tastes sour and weak.

How do you hit that? Start with the ratio (55 g/L) and adjust your grind. The SCA recommends a contact time of 1–4 minutes for a fine grind (pour over), 4–6 minutes for medium (drip), and 6–8 minutes for coarse (French press) (SCA). That's your guide. For a pour over, use water at 200–205°F (93–96°C) and aim for a total brew time of 3–4 minutes (Roast Coffee Co. pour over). If your extraction is off, your review should say so. Don't blame the beans if your grind is too fine.

Water matters more than people think. The SCA water standard calls for a TDS of 150 mg/L, with an acceptable range of 75–250 mg/L, and a pH of 6–8 (SCA Water Standard). Hard water (calcium and magnesium) helps extraction; alkaline water buffers acidity (SCA Water Standard). If your tap water is weird, your review is invalid. Use filtered water. That's non-negotiable.

What to Write: From Numbers to Verdict

So you've cupped, you've brewed, you've measured. Now write the review. Start with the roast level and the beans' origin—if the bag says "Ethiopia, washed process," note that washed processing yields a clean, bright cup (ECF). Then give your extraction numbers: what TDS did you hit, and what yield? If you don't have a refractometer, you can approximate by taste—but you should note that you're estimating.

Here's where the opinion comes in. We'll say it plainly: most specialty coffee is overpriced for what it is. The fact that specialty grade is 80+ on the cupping scale doesn't mean it's worth $30 a bag. Specialty roasters pay 2–5x the commodity price for high-quality lots (Roast Coffee Co. specialty), but that cost doesn't always translate to a better cup. When you review, ask: is this coffee worth the price? Compare it to a commodity coffee at half the price. If the difference is marginal, say so.

Also, consider the roast level's effect on caffeine. Light roast has slightly more caffeine by weight, but in a brewed cup the difference is less than 5% (Roast Coffee Co. roast levels). So don't fall for the "dark roast = more caffeine" myth. If you're reviewing a decaf, note that it must have at least 97% of caffeine removed, and a typical cup has about 2 mg vs 95 mg for regular (NCA decaf). That's relevant for people who drink coffee for the ritual, not the buzz.

Finally, use a paper filter. Harvard nutrition experts recommend it because unfiltered coffee can raise LDL cholesterol (Harvard Chan). That's a health note, but it also affects flavor: paper filters remove oils that contribute to body and bitterness. If you're reviewing a French press, note that the brew is unfiltered and will taste different. That's not a flaw; it's a choice.

Bottom line

The single best move for any coffee reviewer is to adopt the SCA cupping protocol, even in simplified form. Use a consistent ratio, grind, and water; taste multiple cups; and record those observations. That's how you move from "I liked it" to "This is a 82-point coffee with a clean finish but a slightly astringent acidity." That's a review that means something.

Sources

• SCA - https://sca.coffee
• Roast Magazine - https://roastcc.com/learn/coffee-roast-levels
• Roast Coffee Co. grind size - https://www.roastcc.com/learn/coffee-grind-size-chart
• PyraBrew cupping - https://www.pyrabrew.com/education/cupping
• SCA Water Standard - https://scaa.org/PDF/ST%20-%20WATER%20STANDARD%20V.21NOV2009A.pdf
• NCA - https://www.ncausa.org/Newsroom/Grounds-for-celebration-Americans-remain-committed-to-coffee