How to Review Coffee Like a Pro (And Stop Wasting Money on Bad Beans)

Most coffee reviews are useless. They tell you a coffee is "smooth" or "bold" without a single number you can act on. You can do better. I'm going to walk you through a practical, repeatable method to review coffee yourself—no fake expertise required. This is for anyone who's tired of guessing whether a bag of beans is worth $22 or $8. Follow these steps and you'll judge coffee on evidence, not marketing.

1. Start with a clean, controlled brew

Before you judge any coffee, you need a baseline. That means brewing with the same recipe every time. The Specialty Coffee Association's Golden Cup standard recommends 55 grams of coffee per 1 liter of water, with a ±10% tolerance—roughly 50–60 g/L (SCA). In practice, that's a 1:16 to 1:18 coffee-to-water ratio by weight. For a single 12-ounce cup, that's about 20–22 grams of coffee to 350–360 grams of water. Get a cheap kitchen scale. Eyeballing scoops is how you end up reviewing your own inconsistency instead of the coffee.

2. Match your grind to your method—exactly

Grind size isn't a preference; it's a variable. The grind size chart maps it precisely: extra-coarse for cold brew (12–24 hour steep), coarse for French press and percolator, medium-coarse for Chemex, medium for flat-bottom drip, medium-fine for V60 pour over, fine for moka pot, and extra-fine for espresso and Turkish coffee (Roast Coffee Co. grind size). If you're reviewing a coffee and your grind is off, you're reviewing your grinder, not the bean. A $15 hand grinder set to medium-fine will beat a $200 blade grinder every time.

3. Control your water temperature and time

SCA recommends water at about 200°F ± 5°F (roughly 93°C ± 3°C) at the point of contact with the coffee. Contact time should be 1–4 minutes for fine grind (pour over), 4–6 minutes for medium grind (drip), and 6–8 minutes for coarse grind (French press) (SCA). For pour over specifically, the target is 200–205°F, medium-fine grind, and a 3–4 minute total brew time (Roast Coffee Co. pour over). If you don't have a thermometer, boil water and let it sit for 30–45 seconds. That's not perfect, but it's close enough to start.

4. Taste for the two numbers that actually matter

Forget vague descriptors. The Golden Cup targets are 1.15–1.35% total dissolved solids (TDS) for strength and 18–22% extraction yield for how much of the dry coffee mass dissolved into the water (SCA). You can't measure those without a refractometer, and you don't need to buy one. But you can taste for them. Under-extracted coffee (below 18%) tastes sour, salty, and thin. Over-extracted (above 22%) tastes bitter, dry, and hollow. Your job as a reviewer is to say which side of that range a cup falls on. That's actionable. "Smooth" is not.

5. Use a simple cupping protocol for comparison

If you're comparing multiple coffees, cup them side by side. The SCA cupping protocol uses 8.25 grams of coffee per 150 milliliters of water, water with a TDS of 125–175 ppm, and a grind slightly coarser than drip (PyraBrew cupping). Evaluate five cups of the same coffee to check uniformity—one defective cup penalizes the entire lot (PyraBrew cupping). For home use, three cups is fine. The point is to taste blind and take notes before you look at the bag. You'll be shocked how often the $12 coffee beats the $28 one when you don't know which is which.

6. Know what can go wrong (and how to fix it)

Here's the warning: pre-ground coffee starts going stale within 15–30 minutes of grinding because the larger exposed surface area oxidizes faster (Roast Coffee Co. grind size). If you're reviewing pre-ground coffee, you're reviewing stale coffee. Buy whole bean and grind immediately before brewing. The other common failure is water. SCA water guidelines call for odor- and color-free water with a pH of 6–8 and total hardness of 40–175 ppm, and the SCA water standard sets a TDS target of 150 mg/L with an acceptable range of 75–250 mg/L (SCA Water Standard). If your tap water tastes like chlorine, your coffee will too. Use filtered water. That single change can improve a cup more than upgrading your brewer.

7. Review the roast level honestly

Roast level changes everything. First crack occurs around 196–205°C (385–401°F) and marks the transition into drinkable coffee and the end of light roasts (Roast Magazine). Second crack occurs around 224–230°C (435–450°F) and marks the threshold for medium-dark to dark roasts (Roast Magazine). A light roast is typically 180–205°C, stopped at or just after first crack, with bright, fruity, high-acidity flavor. Medium is 210–220°C, balanced and nutty. Dark is about 240–250°C, with a shiny oily surface and bold, smoky, low-acidity flavor (Roast Magazine). When you review, state the roast level and whether the flavors match. A dark roast that tastes ashy isn't "bold"—it's over-roasted. Say so.

The single most important thing to remember

You are not reviewing coffee to sound smart. You are reviewing it to decide whether to buy it again. Every number in this guide—55 g/L, 1.15–1.35% TDS, 18–22% extraction, 8.25 g per 150 ml—exists so you can make that decision with evidence. If a coffee tastes sour, your grind is too coarse or your water is too cool. If it tastes bitter, the opposite. Adjust one variable at a time, taste again, and write down what changed. That's the whole method. It works on a $10 bag and a $40 bag. And it will save you from ever again buying a coffee just because the label said "artisanal."

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
• Roast Coffee Co. pour over - https://www.roastcc.com/learn/how-to-make-pour-over-coffee
• PyraBrew cupping - https://www.pyrabrew.com/education/cupping
• SCA Water Standard - https://scaa.org/PDF/ST%20-%20WATER%20STANDARD%20V.21NOV2009A.pdf