SCA Barista key terms

The process of dissolving soluble flavor compounds from coffee grounds into water. The amount extracted determines whether a brew tastes balanced, sour and thin, or bitter and dry.

A brew state where too few soluble compounds have dissolved, typically producing sour, salty, thin, or hollow flavors. Common causes include too-coarse grind, too-short contact time, or too-cool water.

A brew state where excessive soluble compounds have dissolved, typically producing bitter, dry, astringent, or hollow flavors. Causes include too-fine grind, too-long contact time, or too-hot water.

The proportion of coffee to water used in a brew, usually expressed in grams of coffee per gram of water. It strongly influences strength and perceived balance in the cup.

The average particle size produced by the grinder. Finer particles expose more surface area and extract faster; coarser particles extract more slowly.

An uneven flow of water through a coffee bed or espresso puck, where water finds paths of least resistance. It causes uneven extraction, often producing both sour and bitter notes in one shot.

The steps of dosing, distributing, and tamping espresso grounds into the basket to create an even, level bed. Good preparation reduces channeling and improves shot consistency.

Compressing the espresso grounds in the basket with a tamper to form a level, uniform puck. Consistent pressure and levelness help ensure even water flow.

Leveling and spreading espresso grounds evenly within the basket before tamping. Even distribution helps prevent density differences that lead to channeling.

The mass of liquid espresso produced from a given dose of dry coffee, usually measured in grams. Comparing dose to yield helps control strength and extraction.

The duration from when the pump starts until the espresso shot is finished. It is a key control variable for repeatable extraction, alongside dose, yield, and grind.

The layer of foam on top of an espresso shot, formed from carbon dioxide and oils emulsified under pressure. Its color and persistence offer clues about freshness and flow.

The process of injecting air and heat into milk with a steam wand to create microfoam. Proper technique yields glossy, sweet milk suitable for latte art and balanced texture.

Milk textured with very fine, uniform bubbles that appear glossy and paint-like. It integrates smoothly with espresso and is essential for pouring latte art.

Patterns created by pouring steamed milk into espresso, relying on contrast between crema and microfoam. Good technique requires well-textured milk and controlled pour height.

A grinder that crushes beans between two abrasive surfaces, producing more uniform particle sizes than a blade grinder. Uniformity supports predictable extraction and repeatable recipes.

Adjusting a grinder's setting so that a given recipe produces the desired shot time and taste. It must be repeated as beans age, humidity changes, or a new coffee is opened.

Removing mineral scale, mainly calcium carbonate, from equipment using a mild acid solution. Regular descaling protects heating elements and keeps water flow and temperature stable.

A cleaning routine that forces water and detergent backward through the espresso machine's group head and valve. It removes coffee oils and residue that build up during service.

The part of an espresso machine where the portafilter locks in and water is delivered to the coffee. It requires regular cleaning and temperature stability for consistent shots.

The handle-and-basket assembly that holds espresso grounds and locks into the group head. Basket size and cleanliness affect dose and flow.

The concentration of dissolved minerals, primarily calcium and magnesium, in water. It affects scale buildup in equipment and can influence extraction and flavor.

Treating water to remove impurities, sediment, and some minerals before it enters coffee equipment. Proper filtration protects machines and supports consistent flavor.

Scheduled cleaning, inspection, and replacement of wear parts such as gaskets and burrs before failures occur. It reduces downtime and keeps equipment performing consistently.

A standardized method of evaluating coffee aroma, flavor, acidity, body, and aftertaste by steeping and breaking the crust. It allows fair comparison across samples.

A numerical rating assigned by trained tasters using a defined scale and attributes such as acidity, sweetness, and balance. Scores help communicate quality but depend on calibration.

A certified professional who has passed standardized sensory and coffee-knowledge testing. Q Graders apply consistent protocols when evaluating and scoring coffees.

A reference chart organizing coffee aromas and flavors into categories and subcategories. It helps tasters use consistent vocabulary when describing a cup.

A dry, puckering mouthfeel caused by compounds binding with saliva, often linked to over-extraction or certain roast profiles. It is a tactile sensation, not a taste.

The tactile weight or texture of coffee in the mouth, ranging from thin and watery to heavy and syrupy. It is distinct from flavor and aroma.

A bright, lively sensation in coffee, often described as fruity or citric. It is a desirable attribute when balanced, but can taste sharp or sour when excessive.

Evaluating coffee without knowing its origin, roast, or processing, to reduce bias. It is used in training and competitions to test sensory accuracy.

The release of carbon dioxide from roasted beans over days after roasting. Freshly roasted coffee releases gas that can disturb extraction and crema formation.

The date coffee was roasted, printed on packaging. It helps baristas judge freshness and adjust grind and recipes as beans age.

Coffee sourced from one country, region, or farm rather than blended. It highlights distinctive characteristics tied to variety, terroir, and processing.

The ability to follow a coffee's path from farm through processing and export to the roaster. It supports transparency, quality control, and fair pricing.

A sourcing model where roasters buy directly from producers, often with longer-term relationships and quality-based pricing. It aims to improve transparency and producer returns.

A third-party label verifying minimum prices, social standards, and community premiums for producers. It signals ethical sourcing claims to buyers.

How coffee cherries are turned into dried green beans, such as washed, natural, or honey. The method strongly influences flavor, body, and shelf life.

Finding productive uses for coffee waste such as spent grounds, chaff, or pulp, for example composting or energy recovery. It reduces landfill impact and supports circular operations.

Operational practices that minimize discarded materials, including portion control, reusable cups, and recycling. It lowers environmental footprint and cost.

Breaking down organic coffee waste, such as grounds and chaff, into nutrient-rich soil amendment. It diverts waste from landfill and returns nutrients to the soil.