2.2 Main Taste Solutions Practical: Sweet, Salty & Sour Intensities

Coffee cupping depends on separating taste — what taste buds detect — from aroma perceived through the nose. The Main Taste Solutions practical removes coffee entirely and tests the taste side alone, using water-based solutions.

What the SCA says the exam evaluates

According to the SCA's preparation guidance, this practical "evaluates a participant's ability to detect and describe main tastes and their intensities in both simple and complex solutions." The SCA's practice advice is specific:

• Prepare sweet, salty, and sour solutions according to the "Taste Basics" section of the WCR Sensory Lexicon.
• Vary the quantities of sugar, salt, and citric acid to create and practice different intensities.
• Sensory Skills Foundation and Intermediate courses provide structured practice with main taste solutions.

The SCA does not publish the exact concentrations, number of cups, or pass mark used in the exam. Your goal is to become reliable at two judgments: which taste or tastes are present, and how strong each one is.

Reference concentrations you can verify

Two official documents give reference solutions.

World Coffee Research Sensory Lexicon (2016), Taste Basics — each reference has an intensity on the lexicon's 0–15 scale:

The lexicon serves each reference in a covered one-ounce cup. Lexicon 2.0 (October 2017) added globally available FlavorActiV references for 24 attributes, including sour, bitter, and salty.

SCA Standard 103 (Descriptive Assessment) gives qualitative examples for each main taste: salty 0.20% sodium chloride, sour 0.04% citric acid, sweet 0.52% sucrose, bitter dark-roasted coffee at about Agtron 35, and umami 0.10% monosodium glutamate.

Converting percentages to a recipe

These are weight-per-volume percentages: grams of solute per 100 mL. Multiply by 10 to get grams per liter.

Use a scale that reads to 0.01 g for the acid and salt, odorless water, and clean glassware. Label cups with random three-digit codes and record the key separately.

Building an intensity ladder for practice

Because the exam asks about intensity, train with at least three levels of each taste. A simple method is to double the concentration between steps. The levels below are practice suggestions, not SCA exam concentrations:

Practice in this order:

1. Known references — taste each ladder in order, low to high, and memorize the steps.
2. Blind single solutions — a partner hands you coded cups. Name the taste and the level.
3. Two-taste mixtures — for example, medium sweet with low sour.
4. Three-taste mixtures — sweet, salty, and sour together at different levels.

Why complex solutions are harder

Tastes interact when they are mixed:

• Sweet–sour suppression. Sugar reduces perceived sourness and acid reduces perceived sweetness. A low acid level inside a medium-sweet solution can disappear entirely, so tasters report "sweet only."
• Salt and bitterness. Salt is well known to suppress bitterness. At low levels it can also round a solution so it seems sweeter or smoother.
• Confusing low levels. Low salt and low citric acid can both cause mild salivation and a dry edge. Tasters who sip quickly often swap them.

To protect yourself from these traps:

• Taste in a fixed order — sweetness first (front of the tongue, immediate), then sourness (salivation, sharpness), then saltiness (a slower savory or briny edge).
• Compare against your references whenever they are allowed. Re-taste the medium reference before deciding between two levels.
• Avoid phantom tastes. If you cannot confirm a taste after a second sip, do not report it.

Technique on exam day

• Take a consistent sip volume and let it cover the whole tongue before spitting.
• Rinse with neutral, room-temperature water between cups and pause a few seconds before the next sip.
• Write your answer for each cup before moving on, then use spare time to re-check only the cups you marked as uncertain.

Why this matters for cupping

The CVA Descriptive Form asks you to record up to two main tastes — salty, sour, sweet, bitter, or umami — that stand out across flavor and aftertaste. It also asks you to rate acidity and sweetness intensity on 15-point scales. Calibrated taste ladders make those judgments repeatable. Chapter 5 covers how acidity and sweetness are described on the CVA forms.