5.2 Rating Acidity & Sweetness on the CVA Forms

Acidity and sweetness are where coffee cupping most often goes wrong. In the heritage cupping form, a single score blended how much acidity a coffee had with how good it was. The CVA separates those judgments across two forms, and the Q Grader practicals test whether you keep them apart.

Definitions in the CVA standards

SCA-102, SCA-103, and SCA-104 share these definitions:

• Acidity — "the perception of sour taste provoked by the brew, which may vary in intensity and character."
• Sweetness — "the perception of gustatory or retronasal sweetness provoked by the brew."

Both sections are assessed in step 3, liquoring, as the brew cools.

The sweetness definition includes retronasal sweetness. Aromas such as brown sugar, caramel, vanilla, or ripe fruit can make a coffee seem sweet even when sugar content is low. Your sweetness rating should capture the whole sweet impression you perceive.

On the Descriptive Form (SCA-103)

SCA-103 says: "The acidity intensity shall be rated, and its characteristics described through freely elicited terms. The same shall be done for sweetness." Because there are no boxes, your vocabulary matters.

Useful acidity descriptors

Useful sweetness descriptors

Describe the kind and behavior of sweetness, not just its aroma: "brown-sugar-like," "honeyed," "clean and short," "syrupy and lingering," "ripe-fruit sweetness." An SCA practice activity asks cuppers to describe sweetness by its intensity, complexity, or duration rather than relying only on aroma words.

Version note

The Version 1.1 Descriptive Form (September 2023) asked tasters to select either dry acidity (herby, grassy, tart) or sweet acidity (juicy, fruit-like, bright). The Version 2 form (June 2024) dropped that choice. Describe acidity character in your own words instead.

On the Affective Form (SCA-104)

The Affective Form rates eight sections — fragrance, aroma, flavor, aftertaste, acidity, sweetness, mouthfeel, and overall — on a nine-point impression-of-quality scale: 1 = extremely low, 5 = neither high nor low, 9 = extremely high. Affective notes should justify the rating rather than repeat descriptive notes. For example: "acidity bright but slightly sharp at the finish; rated 6."

SCA-104 adds that the impression of quality may reflect your own preference or a known market preference, and must not be influenced by other cuppers in a group setting.

Intensity versus quality: worked examples

The same intensity can earn very different affective ratings, and similar affective ratings can come from very different intensities. That separation is the point of the CVA.

Sweetness in practice

A practice drill for acid character

The SCA's Coffee Sensory and Cupping Handbook describes an older SCAA Organic Acids course. In it, citric, malic, acetic, and phosphoric acids were added to a reference coffee brew to show how each changes the taste of coffee. Matching acids is not a Q Grader exam any more, but the drill still builds a vocabulary for freely elicited acidity words:

1. Brew one clean, medium-acidity washed coffee as a batch.
2. Pour equal cups and leave one unaltered as the control.
3. Add a small, equal amount of a different food-grade acid to each of the other cups, and record what you add.
4. Taste each against the control and write two or three words for how the acidity changed — sharper, fruitier, more vinegar-like, softer.

Repeat the drill with the cups coded blind. The aim is a reliable link between what you taste and the words you write, not chemical identification.

Exam-day habits

1. Rate intensity first, quality second. On a combined assessment, finish the descriptive mark before the affective bubble for each section.
2. Use the full scale. Clustering every coffee at 6–7 on intensity hides real differences.
3. Write at least one word for acidity and sweetness on every Descriptive Form. The descriptive practical is graded on accuracy, and an empty description cannot be accurate.
4. Re-check as the coffee cools. Acidity often seems brighter and sweetness more obvious as the cup cools. If your view changes, mark the change with an arrow rather than erasing.