Coffee Cupping: How to Cup Coffee at Home

Cupping is how coffee professionals taste and evaluate coffee - and it is one of the most useful skills you can develop as a home roaster. It is not complicated, it does not require expensive equipment, and it will teach you more about your roasting in a single session than weeks of casual tasting.

Most cupping guides are written for consumers - how to appreciate different coffees at a tasting event. This one is written for people who roast. If you are roasting at home and want to know whether your profile is working, whether the green coffee you bought is any good, or why your last batch tasted different from the one before, cupping is how you find out.

This guide covers what cupping is, how to set it up at home, the step-by-step process, what to taste for as a roaster, and how to use cupping to make better roasting and buying decisions. (If you are newer to roasting, our guide on roasting coffee beans at home covers the fundamentals.)

What is coffee cupping?

Coffee cupping is a standardised method of brewing and tasting coffee designed to evaluate its quality as objectively as possible. The coffee is ground coarsely, steeped in hot water in a cup, and tasted directly from the cup with a spoon - no filter, no brewing device, no variables beyond the coffee, the water, and the time.

The method is deliberately simple because the goal is to remove as many brewing variables as possible so you are tasting the coffee itself - not the performance of a pour-over technique or an espresso machine. Every cup is brewed identically, which means any difference you taste between cups is coming from the coffee or the roast, not from how it was made.

This is why cupping is the standard evaluation method across the entire coffee industry - from producers at origin to importers, roasters, and Q graders. And it is why it is so useful for home roasters: it isolates the variables you care about (the green coffee and your roast profile) from everything else.

What you need

You do not need specialist equipment. Most of what you need is already in your kitchen.

• Cups. 

Identical ceramic cups or bowls, ideally 150-200ml capacity and wider at the top than the base. Coffee cups, soup bowls, or small tumblers all work. Two cups per coffee is useful for checking consistency - if the duplicates taste different, something in your process is inconsistent - but it is not essential. One cup per coffee works fine, especially when you are starting out.

• Scales. 

For weighing coffee and water accurately.

• Grinder. 

Set to a medium-coarse grind - roughly the texture of coarse sand. Consistency matters more than precision here.

• Kettle. 

Water heated to around 93-96°C. If you do not have a temperature-controlled kettle, bring it to a boil and wait 30-60 seconds.

• Spoons. 

Wide, rounded soup spoons - one per taster, or two if you are cupping alone (one to skim, one to taste). A tall glass of hot water for rinsing spoons between cups.

• Timer.

• A bowl or cup for skimming grounds into.

• Something to spit into.

 If you are cupping multiple coffees, some people choose to spit into a spittoon or spare cup so they do not consume too much caffeine. However, this is completely optional.

• A notebook.

Write down what you taste so you don't forget.

The coffee cupping ratio

The standard cupping ratio is 1:18 - coffee to water by weight. In practice, that means 11g of coffee to 200ml of water, or if you are using smaller cups, scale it down proportionally. Whatever cup size you use, keep the ratio the same across every cup in a session so that your cupping remains consistent.

Step by step: how to cup coffee

• Grind your coffee. 

Medium-coarse - coarser than you would use for filter, finer than French press. If you are cupping multiple coffees, purge the grinder with a couple of grams of the next coffee before grinding each sample to clear any residue from the previous one.

• Dose into cups. 

Weigh your coffee into each cup at the 1:18 ratio.

• Smell the dry grounds. 

Before adding water, lean in and inhale. Note any aromas - fruity, floral, nutty, grassy, chocolatey. 

• Add water. 

Start a timer and pour your water at 93-96°C into each cup. Pour at a steady pace and try to create a vortex so that all the grounds become saturated.

• Wait 4 minutes. 

The grounds will form a crust on the surface.

• Break the crust. 

At 4 minutes, take a spoon and push through the crust with three gentle strokes, pushing the grounds toward the back of the cup. As you break the crust, put your nose close to the surface - this is when the most intense burst of aroma is released. Note what you smell. Rinse your spoon in the hot water between each cup.

• Skim. 

After breaking all the cups, use one or two spoons to gently remove the floating grounds from the surface. You want a relatively clean surface to taste from. Do not stir or disturb the grounds that have settled to the bottom.

• Wait until the coffee cools. 

Begin tasting around 8-10 minutes after pouring. At this temperature, flavours are more perceptible than when the coffee is scalding hot. Some cuppers wait until 15 minutes for the first taste but you can taste as the coffee cools as the flavour will change.

• Taste. 

Take a spoonful and slurp it - loudly, deliberately. The slurp aerates the coffee and spreads it across your whole palate, which helps you perceive flavour, acidity, body, and aftertaste more clearly. Rinse your spoon between every cup and you can spit if you are cupping many samples.

• Taste again as it cools. 

This is one of the most important parts of cupping. Coffee changes as it cools - good coffee often gets more interesting, revealing new flavour notes at lower temperatures. Taste the same cups at least two or three times over 15-20 minutes and note how they evolve.

What to taste for as a home roaster

This is where cupping for roasters diverges from cupping for consumers. You are not just asking "do I like this?" - you are asking "what is my roast doing to this coffee?"

The table below maps common tasting observations to their likely causes and what to adjust. It is not exhaustive, but it covers the defects and patterns you are most likely to encounter.

The most useful diagnostic habit is tasting as the cup cools. Well-roasted coffee gets more interesting at lower temperatures - new flavours appear, sweetness becomes more apparent, complexity develops. Coffee with roast defects does the opposite: whatever flavour was there when hot disappears, leaving something flat or unpleasant. If your coffee tastes reasonable at first sip but lifeless five minutes later, the roast is the most likely cause.

Using cupping to compare roast profiles

One of the most powerful things you can do as a home roaster is cup two different roasts of the same coffee side by side.

Roast the same green coffee with two different profiles - maybe one with more energy in the early phase, one with more development time, one lighter, one darker. Cup them blind (have someone else label the cups, or label the bottoms and shuffle them). Taste without knowing which is which.

This is how you learn what your roasting decisions actually do to the cup. You will discover that small changes - a few seconds more development, 5°C more charge temperature - can produce meaningful flavour differences. And you will learn which direction you prefer.

Over time, this builds your palate and your roasting intuition simultaneously. You stop guessing and start making decisions based on what you taste.

Using cupping to evaluate green coffee

If you buy green coffee from us and want to evaluate it before roasting a full batch, cupping a sample roast is the most reliable way. Roast a small sample, cup it alongside other coffees, and compare different coffees you are considering buying. Cupping two or three options side by side is the most reliable way to decide which one suits your roasting and your palate.

Cupping also helps you decide what roast level suits a new coffee. Roast the same green at three or four different levels and cup them all. You will see where the acidity is brightest, where sweetness peaks, and where the coffee starts to lose character. That gives you a clear target for your main batch.

Tips for better cupping

Cup blind whenever you can. If you know which cup is which, your expectations will influence what you taste. Shuffle the cups, label the bottoms, and taste without looking.

Do not talk about what you taste until everyone has finished. If someone says "I'm getting raspberry," everyone else will start tasting raspberry too. It is more useful to taste independently, write your notes, then compare.

Focus on one quality at a time. If trying to assess everything at once feels overwhelming, pick one attribute per pass - acidity on the first round, sweetness on the second, body on the third. This makes the process more manageable and your notes more specific.

Use the SCA Flavour Wheel. The SCA Coffee Taster's Flavour Wheel is a useful reference for putting words to what you taste. Start from the centre (general categories like "fruity," "nutty," "chocolatey") and work outward to get more specific.

Cup regularly. Cupping once is interesting. Cupping regularly is transformative. Try to cup every roast, even if it is just a quick assessment before you brew the rest of the batch. The more you cup, the faster your palate develops.

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Wrapping up

Cupping is the single most useful habit you can develop as a home roaster. It takes 15 minutes, uses equipment you already have, and teaches you more about your coffee and your roasting than any amount of reading or theory.

Set up a cupping every time you try a new coffee or adjust a roast profile. Taste blind when you can. Write everything down. And pay attention to how the cup changes as it cools - that is where the most useful information lives.