Home Coffee Cupping: The Simplified SCA Protocol
Summary: The SCA cupping protocol requires just four things done right: the correct ratio (8.25g per 150ml), the right water temperature (93°C), breaking the crust at exactly 4 minutes, and slurping the coffee from 8 minutes onwards. This guide walks you through each step, explains the why behind each rule, and helps you avoid the mistakes that derailed your first attempt.
The first time I tried to cup coffee at home, I got it wrong in three ways simultaneously. Too little coffee — I eyeballed roughly a tablespoon. Water straight from the boil — I figured hot was hot. And I tasted after two minutes because I was impatient. The result tasted like brown water with a vague coffee suggestion. I didn't understand what all the fuss was about. Then someone handed me the actual SCA protocol, and the same coffee tasted completely different. The ceremony around cupping isn't ceremony for its own sake — the parameters are there because they work.
What cupping actually is — and isn't
Cupping is not a brewing method. You don't drink the result like a cup of coffee. It's an evaluation protocol — a way to assess a coffee's aromatic profile, acidity, body, and aftertaste under controlled conditions. Q Graders (certified sensory evaluators) use it to score coffees on a 100-point scale; the minimum threshold for a coffee to be classified as specialty grade is 80 points.
The reason cupping works as an evaluation tool is precisely its simplicity. No paper filter to absorb oils. No pressure variables like espresso. Just ground coffee, hot water, time, and a spoon. Every variable that could mask or distort the coffee's natural character is removed, leaving only the coffee itself.
That's why the parameters matter so much. The SCA ratio of 8.25 g per 150 ml (approximately 1:18.18) isn't a suggestion — it's the point where the coffee is concentrated enough to evaluate properly but not so intense that it numbs the palate. For a 200 ml bowl, you're looking at about 11 g of freshly ground coffee.
What you need — and what you don't
You do not need professional cupping bowls. Ceramic soup bowls or large mugs in the 200–240 ml range work perfectly well. Here's what you actually need:
- A scale accurate to 0.1g — the single most important piece of equipment
- A kettle that can hold 93°C / 200°F — temperature-controlled is ideal, but resting boiled water for 30–45 seconds gets close
- A burr grinder set to coarse — similar to French press grind size; a blade grinder will produce uneven particle sizes and give you inconsistent results
- Two matching ceramic bowls per coffee — cupping in duplicate helps you spot inconsistencies
- A stainless steel tablespoon — for breaking the crust and scooping the liquor
- A timer — 4 minutes and 8 minutes are non-negotiable
The SCA Flavor Wheel is free to download at sca.coffee and gives you a structured vocabulary to put names to what you taste. Print it or keep it open on your phone.
The protocol, step by step
Step 1 — Weigh and grind
Weigh 8.25 g per 150 ml of water (11 g for a 200 ml bowl). Grind immediately before use — oxidation begins the moment the coffee is ground. Set your grinder to coarse: you're aiming for particle sizes roughly comparable to coarse sea salt. Place the grounds in your preheated bowls.
Step 2 — Smell the dry grounds
Before adding water, nose the bowl. This is the dry fragrance — your first data point on the coffee's character. Take note of what you smell. Florals? Fruit? Chocolate? Nuts? These initial impressions will anchor your evaluation as the coffee develops.
Step 3 — Pour at 93°C and start your timer
Pour your 93°C water directly onto the grounds in one even pour, wetting all the coffee. Start your timer the moment you pour. The wet aroma releases immediately — smell it. You'll often notice different compounds than in the dry fragrance; this transformation is part of what makes cupping interesting.
Step 4 — Break the crust at 4 minutes
At the 4-minute mark, a crust of grounds and foam will have formed on the surface. Position your spoon at the far edge of the bowl, tilt the back of the spoon towards you, and push through the crust with three gentle strokes while nosing the bowl actively. The burst of aroma that releases is one of the most revealing moments in the session. After breaking, use two spoons to skim off the floating foam and remaining particles.
Step 5 — Liquoring from 8 to 10 minutes
From 8 to 10 minutes post-pour, the coffee has settled and cooled enough to taste safely. Dip your spoon just below the surface, lift a small amount of liquid, and slurp it loudly and deliberately. The noise is the point: the air you inhale with the coffee aerates it and projects aromatic compounds toward your retro-nasal receptors. Don't be shy about it.
Taste every couple of minutes as the coffee cools. Coffees with complex profiles often reveal their best qualities at 40–50°C — a temperature range where sweetness and nuance register more clearly than at scalding heat.
The three mistakes that ruin a home cupping
Using too little coffee is the most common. A tablespoon is not a measurement. You need a scale. Underdosing produces a weak, flat result that makes it impossible to read the coffee's character.
Using boiling water is the second. At 100°C you extract harsh, astringent compounds that mask the coffee's best qualities. 93°C is the SCA standard for a reason.
Tasting too early is the third — and the mistake I made. At 2 minutes the coffee hasn't fully extracted and is still too hot to taste accurately. Wait for the 8-minute mark. Patience is part of the protocol.
Frequently asked questions
What is the correct SCA cupping ratio?
8.25 grams of ground coffee per 150 ml of water — a ratio of 1:18.18. For a 200 ml bowl, that's approximately 11 grams. Weighing precisely is more important than the exact number; consistency across sessions is what lets you compare coffees meaningfully.
Do I really need a thermometer — can I just use boiling water?
Boiling water at 100°C extracts bitter compounds the SCA protocol specifically avoids. Target 93°C / 200°F. Without a temperature-controlled kettle, let boiled water rest for 30–45 seconds before pouring. A basic probe thermometer removes all uncertainty for under €10.
What should I be looking for when I slurp the coffee?
Focus on: acidity (citrusy and bright vs. soft and round), body (thin vs. syrupy), sweetness, and specific flavour notes. Use the free SCA Flavor Wheel at sca.coffee to name what you taste. Repeat every two minutes — the coffee's profile changes dramatically as it cools.
Where to go from here
Once the protocol feels comfortable, the real work begins: comparing multiple coffees side by side, tracking how roast levels affect your scores, and developing your personal flavor vocabulary. The guides on expertcafe.be cover origins, roast profiles, and brew methods to give you context for what you taste in the cup.
The FAQ section answers the most common questions about sensory evaluation, including how to read the SCA scoring sheet and the difference between fragrance, aroma, and flavour as defined by the protocol.