Cupping is the standardised method professionals use to evaluate coffee, comparing beans on equal footing rather than relying on a one-off cup made however you happen to brew that day. It sounds technical, but the actual protocol is straightforward enough to run at home with basic equipment.
What you need
- A burr grinder, for uniform particle size
- A digital scale with gram precision
- Uniform cupping vessels, 6 to 8oz capacity, the same for every sample
- A dedicated spoon for tasting
- A temperature-controlled kettle
- A timer
None of this needs to be expensive. A decent home setup covering all of the above is achievable well under $100 if you don't already own most of it.
The standard protocol
Ratio: 8.25 grams of coffee to 150ml of water per cup, kept consistent across every sample you're comparing. Consistency between cups is the entire point of cupping, an uneven ratio undermines the comparison before you've even tasted anything.
Water: heated to 93°C.
Steep: pour the water directly over the grounds and let it steep, undisturbed, for four minutes.
Tasting properly
Break the crust with your spoon, four passes, pushing the grounds back and smelling deeply as you do. Skim off the floating grounds and any foam. Then taste by slurping a spoonful, the aeration spreads the coffee across your palate and up into your retronasal passage, which is where a surprising amount of flavour perception actually happens, not just on the tongue.
Taste each sample multiple times as it cools, coffee shows different characteristics at different temperatures, a coffee that tastes flat piping hot can open up considerably once it's dropped closer to room temperature.
Comparing multiple coffees
The real value of cupping is comparative: brewing several coffees side by side, using identical ratios and timing, makes differences between them far more obvious than tasting them individually on separate days ever would. Take notes as you go, specific descriptors rather than just "good" or "not good," your own vocabulary for this improves quickly with practice.
The takeaway
Cupping isn't a specialised skill reserved for professionals, it's a protocol anyone can run with basic equipment and a bit of patience. If you're trying to genuinely compare a few bags of coffee rather than just brewing them one at a time and half-remembering the difference, this is the method that actually gets you a fair comparison.
